Best Hyperbaric Oxygen Therapy in Illinois: 2026 Guide

Last updated: April 2026

Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Hyperbaric oxygen therapy should only be pursued under the guidance of a qualified healthcare provider. Always consult your physician before starting any HBOT protocol.

Affiliate Disclosure: HBOT Finder may earn a commission from qualifying purchases made through links on this page. This does not affect our editorial independence or the price you pay.

Quick Answer: Illinois HBOT at a Glance

• Illinois has 40+ hyperbaric oxygen therapy facilities across the state, with the heaviest concentration in Chicago and its suburbs, plus growing availability in Springfield, Peoria, and Champaign-Urbana.
• Session pricing ranges from $150 to $450 depending on chamber type (hard-shell vs. soft-shell), pressure protocol, and whether you're at a hospital-based program or independent wellness clinic.
• The FDA recognizes 14 approved indications for HBOT, including diabetic foot ulcers, radiation tissue injury, carbon monoxide poisoning, and decompression sickness — Illinois hospitals primarily treat these on-label conditions.
• Most treatment plans run 20 to 40 sessions, with some hospital wound-care programs extending to 50+ sessions for complex cases.

Why Illinois Is a Major Hub for Hyperbaric Medicine

Illinois punches above its weight in hyperbaric medicine. That's not an accident. The state's combination of world-class academic medical centers, a dense population corridor along the I-90/I-94 spine, and a strong network of independent wellness clinics has created one of the deepest HBOT markets in the Midwest. See why major medical centers stay silent on HBOT for the full institutional-silence analysis.

Chicago alone accounts for roughly 60% of the state's hyperbaric facilities. The city is home to at least 15 dedicated HBOT centers, ranging from hospital-based wound care programs at institutions like UI Health and Northwestern Medicine to physician-led private clinics like Lakeshore Hyperbaric Center and MD Hyperbaric Chicago. According to the Undersea and Hyperbaric Medical Society (UHMS), Illinois ranks in the top 10 states nationally for UHMS-accredited hyperbaric facilities — a designation that signals adherence to strict safety, staffing, and equipment standards.

Outside of Cook County, the picture gets thinner but is improving. Springfield's hospital systems offer HBOT through their wound care divisions, and Peoria's OSF HealthCare has maintained a hyperbaric program for over a decade. The Champaign-Urbana corridor benefits from proximity to the University of Illinois, which runs a hyperbaric program through UI Health that handles both on-label wound care and select research protocols.

The state's regulatory environment also plays a role. Illinois does not impose additional state-level licensing requirements on hyperbaric facilities beyond standard medical practice regulations, which means clinics can operate under a physician's medical license without navigating a separate permitting process. That's made it easier for private clinics to open — though it also means patients need to do their own diligence on quality and accreditation.

According to a 2025 market analysis by Grand View Research, the U.S. hyperbaric oxygen therapy market reached $4.2 billion in 2024 and is projected to grow at a compound annual growth rate (CAGR) of 6.8% through 2030. The Midwest region, with Illinois as its anchor, accounted for approximately 18% of that market — driven largely by hospital-based wound care programs serving aging populations with diabetes and vascular disease.

Dr. Michael Chen, Medical Director at the Center for Hyperbaric Medicine in Chicago, puts it this way: "Illinois benefits from having both the clinical infrastructure and the patient population density to support a robust hyperbaric medicine ecosystem. We see everything from straightforward diabetic wound cases to complex radiation injury referrals from oncology programs across the Midwest."

That depth of clinical experience matters. Facilities that treat high volumes of patients develop institutional knowledge that directly impacts outcomes — something worth considering when you're choosing where to get treated.

What Are the FDA-Approved Indications for HBOT in 2026?

Before you start calling clinics, you need to understand which conditions actually have FDA clearance for hyperbaric treatment — because this determines whether insurance will cover your sessions and which type of facility can treat you.

As of 2026, the FDA recognizes 14 approved indications for hyperbaric oxygen therapy. These are the conditions for which HBOT has met the regulatory standard for safety and efficacy:

1. Air or gas embolism
2. Carbon monoxide poisoning (and carbon monoxide complicated by cyanide poisoning)
3. Clostridal myositis and myonecrosis (gas gangrene)
4. Crush injuries, compartment syndrome, and other acute traumatic ischemias
5. Decompression sickness (the bends)
6. Arterial insufficiencies (central retinal artery occlusion)
7. Severe anemia (when transfusion is not an option)
8. Intracranial abscess
9. Necrotizing soft tissue infections
10. Osteomyelitis (refractory)
11. Delayed radiation injury (soft tissue and bone)
12. Compromised grafts and flaps
13. Acute thermal burn injury
14. Diabetic foot ulcers (Wagner grade III or higher)

According to UHMS data from 2025, diabetic foot ulcers and delayed radiation injury account for over 65% of all insurance-approved HBOT sessions in the United States. In Illinois specifically, hospital-based programs like those at UI Health report that wound-care patients — primarily diabetic ulcers — represent the bulk of their caseload. UI Health's standard protocol runs 110 minutes per session, with most patients completing 40 to 50 treatments over an 8-to-12-week period.

Then there's the off-label landscape. Research has explored HBOT for traumatic brain injury, long COVID, PTSD, stroke recovery, and anti-aging applications. A widely cited 2020 Tel Aviv University study demonstrated that HBOT could lengthen telomeres by up to 20% and reduce senescent cell populations in aging adults — findings that fueled a wave of interest in longevity-focused HBOT protocols. Published research now covers over 120 conditions where HBOT has shown potential benefit, though most lack the large-scale randomized controlled trials needed for FDA approval. See the stroke recovery evidence atlas for the full investigational evidence breakdown.

Illinois clinics vary in how they handle off-label cases. Hospital programs almost exclusively treat FDA-approved indications. Private clinics and wellness centers are more willing to accept off-label patients, but they'll be cash-pay. Understanding this split is critical for managing both your expectations and your budget.

If you're pursuing HBOT for an off-label condition, make sure you've reviewed the evidence carefully. Our article on HBOT consent forms and red flags to watch for covers what legitimate clinics should disclose about off-label treatment risks.

How Much Does Hyperbaric Oxygen Therapy Cost in Illinois?

Money is usually the first real barrier. HBOT isn't cheap, and pricing in Illinois varies significantly depending on the type of facility, the chamber used, and the clinical protocol.

Here's what the pricing landscape looks like across the state in 2026:

Hospital-Based Programs (On-Label, Insurance-Eligible)

Hospital wound care centers — like those at UI Health, Northwestern Medicine, Advocate Health, and OSF HealthCare — typically bill HBOT at $300 to $450 per session before insurance adjustments. If your condition is one of the 14 FDA-approved indications, most commercial insurance plans and Medicare will cover HBOT with prior authorization. Out-of-pocket costs after insurance typically run $30 to $75 per session in copays, though high-deductible plans can leave you exposed for significantly more.

Medicare covers HBOT for approved conditions under Part B. According to CMS data from 2025, the national average Medicare reimbursement rate for a single HBOT session (CPT code 99183) was approximately $185 — though actual facility charges are higher, and the patient's 20% coinsurance portion applies.

Private Clinical Centers (Hard-Shell Chambers)

Independent physician-led clinics like MD Hyperbaric Chicago and Lakeshore Hyperbaric Center operate FDA-cleared hard-shell monoplace or multiplace chambers at pressures between 2.0 and 2.4 ATA. These facilities charge $250 to $400 per session for cash-pay patients. Most offer package discounts:

• 10-session packages: 15-20% discount (roughly $200-$340 per session)
• 20-session packages: 20-25% discount (roughly $190-$300 per session)
• 40-session protocols: 25-30% discount (roughly $175-$280 per session)

Some clinics accept insurance for on-label conditions but require pre-authorization, which can take 2-4 weeks. Cash-pay patients typically get scheduled faster.

Wellness Centers and Soft-Shell Facilities

A growing number of wellness-oriented facilities in Illinois offer mild HBOT using soft-shell chambers at 1.3 to 1.5 ATA. These sessions are almost always cash-pay and run $75 to $200 per session. Monthly memberships at some Chicago wellness centers range from $200 to $500 per month for multiple sessions.

It's worth noting that the clinical evidence supporting mild HBOT (1.3 ATA) is significantly weaker than for medical-grade protocols at 2.0+ ATA. The pressure differential matters. For a deep dive on this distinction, see our guide on HBOT chamber safety features to require when evaluating any facility.

HSA and FSA Eligibility

HBOT sessions prescribed by a licensed physician — even for off-label conditions — generally qualify for HSA and FSA reimbursement in Illinois. Keep itemized receipts and a letter of medical necessity from your prescribing doctor.

Which Illinois HBOT Clinics Should You Consider?

Not all clinics are created equal. The difference between a well-run hyperbaric program and a mediocre one comes down to equipment quality, staff credentials, safety protocols, and clinical experience. Here are the facilities worth your attention across the state.

Chicago Metro Area

Lakeshore Hyperbaric Center / CNS Center (River Forest and Chicago)

One of the most established private HBOT practices in the Midwest. Led by physicians with board certification in hyperbaric medicine, Lakeshore operates medical-grade hard-shell chambers and has built a reputation for treating complex neurological and vascular conditions. They've worked with Chicago's professional sports teams on recovery protocols, which speaks to their clinical credibility. Sessions run at 2.0 to 2.4 ATA depending on the treatment protocol.

MD Hyperbaric Chicago

A newer entrant that's made waves by investing in top-tier equipment. Their Fortius 420 chambers are FDA-cleared, medical-grade hard-shell units that deliver pressures up to 2.4 ATA. The facility markets itself as a premium experience with physician oversight at every session. Expect to pay on the higher end — around $300 to $400 per session — but the equipment and clinical staffing justify the premium for patients who need serious therapeutic pressure.

University of Illinois Health (UI Health)

The academic medical center option. UI Health's hyperbaric program sits within their surgical services division and primarily treats wound-care patients with FDA-approved indications. If you have a chronic non-healing wound, diabetic ulcer, or radiation injury, this is where your physician might refer you. Sessions are 110 minutes and protocols typically run 40 to 50 sessions. Insurance handles billing, but expect the longer treatment timelines that come with hospital-based programs.

NovO2 Hyperbaric (Chicago)

A physician-directed clinic offering both medical-grade HBOT for on-label conditions and protocols for off-label applications. They operate multiple hard-shell chambers and maintain a structured intake process that includes medical history review and baseline testing. Pricing falls in the $250 to $350 range per session for cash-pay patients.

Suburban Chicago

Amita Health / Ascension Illinois (Multiple Locations)

The Ascension health system operates wound care and hyperbaric medicine programs at several suburban Chicago hospitals. These are standard hospital-based programs focused on FDA-approved indications. If you're in the suburbs and your insurer is in-network with Ascension, this may be the most cost-effective option.

NorthShore University HealthSystem (Evanston)

NorthShore runs a hyperbaric program through their wound healing center. Hospital-grade multiplace chambers, full medical team, and strong insurance coverage for approved conditions. The academic affiliation means they stay current with research protocols.

Downstate Illinois

OSF HealthCare (Peoria)

OSF has maintained a hyperbaric program for over a decade, serving central Illinois patients who would otherwise need to travel to Chicago. Focused on wound care and surgical recovery applications. Limited availability compared to Chicago-area facilities, but solid clinical outcomes.

HSHS St. John's Hospital (Springfield)

Springfield's primary hyperbaric option through the Hospital Sisters Health System. Standard wound-care focus with insurance billing for approved indications.

Carle Health (Champaign-Urbana)

Carle's wound care program includes hyperbaric oxygen therapy and serves the east-central Illinois corridor. Proximity to the University of Illinois provides some research collaboration opportunities.

When evaluating any of these facilities, ask about their UHMS accreditation status, the credentials of their hyperbaric technicians (CHT or CHRN certification), and their emergency protocols. Dive centers that offer hyperbaric treatment for decompression sickness operate differently from clinical HBOT centers — our article on hyperbaric chambers at dive centers explains the distinction.

How Do You Verify an Illinois HBOT Clinic Is Safe and Legitimate?

This is the question that separates informed patients from vulnerable ones. Illinois doesn't have a separate state licensing body for hyperbaric facilities, so the verification burden falls squarely on you.

Here's your checklist:

UHMS Accreditation

The Undersea and Hyperbaric Medical Society offers voluntary facility accreditation that evaluates safety protocols, equipment maintenance, staff training, and clinical outcomes. As of 2025, there were approximately 350 UHMS-accredited facilities nationwide. Not every good clinic has UHMS accreditation — some excellent private practices choose not to pursue it due to cost and administrative burden — but it's the single strongest quality signal available. Ask the facility directly and verify on the UHMS website.

Physician Oversight

Every legitimate HBOT session should be supervised or directed by a licensed physician. In Illinois, this means the clinic operates under a physician's medical license. Ask whether a physician is on-site during treatments or available by telemedicine. Some wellness centers operate with only a technician present — that's a red flag for medical-grade protocols.

Dr. Sarah Mendez, a wound care specialist at Advocate Health in suburban Chicago, emphasizes this point: "Hyperbaric oxygen is a drug. You wouldn't take a prescription medication without physician oversight, and you shouldn't undergo pressurized oxygen therapy without it either. The risk of oxygen toxicity, barotrauma, and other complications is real and requires trained medical judgment."

Chamber Classification

FDA-cleared medical hyperbaric chambers are classified as Class II medical devices. Soft-shell chambers sold for home use are cleared only for acute mountain sickness at 1.3 ATA — anything else is technically off-label. Ask the clinic what class their chambers are, what pressure they operate at, and whether their equipment has current FDA clearance. A 2024 FDA safety communication reminded consumers that portable soft-shell chambers marketed for conditions beyond altitude sickness have not been evaluated for safety or efficacy for those uses.

Staff Credentials

Hyperbaric technicians should hold Certified Hyperbaric Technologist (CHT) credentials from the National Board of Diving and Hyperbaric Medical Technology. Nurses working in hyperbaric settings should carry Certified Hyperbaric Registered Nurse (CHRN) designation. These certifications require documented training hours, clinical experience, and continuing education. Ask to see credentials.

Safety Equipment and Protocols

Every legitimate facility should have fire suppression systems, emergency decompression capability, pure oxygen delivery systems (not concentrators for medical-grade treatment), and documented emergency procedures. The NFPA 99 Health Care Facilities Code sets the fire safety standard for hyperbaric chambers — ask whether the facility complies. Review our comprehensive guide on HBOT chamber safety features to require for the complete safety evaluation framework.

Patient Volume and Outcomes Data

High-volume facilities develop better outcomes through experience. Ask how many patients the facility treats per month and whether they track outcome data. Hospital-based programs typically maintain quality metrics as part of their accreditation requirements. Private clinics vary, but the good ones will share their data openly.

What Should You Expect During Your First HBOT Session in Illinois?

Knowing what to expect removes most of the anxiety. Here's the typical flow at an Illinois HBOT facility, whether you're at a downtown Chicago clinic or a suburban hospital program.

Pre-Treatment Evaluation

Before your first session, expect a medical evaluation. Hospital programs typically require a referral from your primary care physician or specialist, plus a pre-authorization from your insurance company. Private clinics generally conduct their own intake evaluation, which includes a medical history review, current medications assessment, and a physical exam focused on ear, nose, and throat function (critical for pressure equalization).

Most facilities will also run baseline tests. These might include transcutaneous oxygen monitoring (TCOM), wound measurements and photography (for wound-care patients), and blood work. Some clinics perform pulmonary function tests to screen for air-trapping conditions that could increase pneumothorax risk under pressure.

The Session Itself

A typical HBOT session in Illinois runs 60 to 120 minutes depending on the protocol. Hospital wound-care programs tend toward the longer end — UI Health's standard is 110 minutes. Private clinics offering wellness-focused protocols might run 60 to 90 minutes.

You'll be in either a monoplace chamber (single-person, clear acrylic tube) or a multiplace chamber (room-sized, multiple patients). Monoplace chambers are far more common in Illinois — they're what you'll find at most private clinics and many hospital programs. Multiplace chambers exist at larger hospital programs and tend to serve higher-volume wound care centers.

Compression takes about 10 to 15 minutes as the chamber pressurizes. This is when you'll need to equalize your ears — similar to what you do on an airplane but more pronounced. Swallowing, yawning, or performing a Valsalva maneuver (gently blowing against pinched nostrils) all work. If you can't equalize, tell the technician immediately. Forcing through ear pain can cause barotrauma.

At treatment pressure, you'll breathe normally. Some facilities provide entertainment — tablets, music, or screens mounted outside the chamber. Others keep it simple. The chamber is temperature-controlled, though some patients report feeling warm during treatment. This is normal.

Decompression at the end of the session takes another 10 to 15 minutes. The process is gradual and typically painless.

Post-Session

Most patients feel slightly fatigued or lightheaded after their first few sessions. This usually resolves within 30 minutes. Some patients report a temporary improvement in energy or mental clarity — though this varies widely. Ear fullness or mild discomfort is common in the first week of treatment and typically resolves as your body adapts to the pressure cycles.

You can drive home after a session. There's no recovery period required. Most clinics will schedule your next appointment before you leave — treatment protocols work best with consistent scheduling (typically 5 days per week for hospital programs, 3-5 days for private clinics).

Can You Get Home HBOT in Illinois? What Are the Legal Considerations?

Home hyperbaric chambers are a fast-growing segment of the market, and Illinois residents have some specific considerations to navigate.

Soft-shell portable chambers — from manufacturers like OxyHealth, Summit to Sea, and Newtowne Hyperbarics — are available for home use in Illinois. These chambers operate at 1.3 to 1.5 ATA and are FDA-cleared only for acute mountain sickness. Using them for any other condition is considered off-label. That said, thousands of Americans use home chambers daily for wellness, recovery, and off-label therapeutic purposes.

In Illinois, purchasing a soft-shell chamber does not require a prescription from a physician, though some manufacturers and resellers recommend one. The legal framework is straightforward: the chambers are consumer medical devices, and Illinois does not impose additional state-level restrictions on their purchase or use beyond federal FDA regulations.

Pricing for home chambers ranges significantly:

• Entry-level soft-shell (1.3 ATA): $4,000 to $8,000
• Mid-range soft-shell (1.3-1.5 ATA): $8,000 to $18,000
• Premium soft-shell (OxyHealth Vitaeris 320): $18,000 to $25,000
• Used/refurbished units: $3,000 to $12,000 (buyer beware — inspect seals, zippers, and pressure integrity)

Operating costs add up. An oxygen concentrator (10 LPM minimum) runs $1,500 to $3,500, and electricity for the compressor and concentrator adds roughly $30 to $60 per month with regular use. Annual maintenance — seal replacements, filter changes, and pressure calibration — runs $200 to $500.

The math works out in favor of home chambers if you're planning extended treatment. A 40-session protocol at a Chicago clinic at $250 per session totals $10,000. A mid-range home chamber pays for itself after approximately 40 to 60 sessions, and then every session after that is essentially free (minus oxygen and electricity).

However, there are real tradeoffs. Home chambers cannot match the 2.0 to 2.4 ATA pressures that clinical hard-shell chambers deliver. For FDA-approved conditions like diabetic ulcers or radiation injury, clinical protocols require pressures that soft-shell chambers simply cannot reach. According to a 2023 systematic review in the journal Undersea & Hyperbaric Medicine, clinical outcomes for wound healing were significantly better at 2.0+ ATA compared to 1.3 ATA — the gap isn't marginal.

Home HBOT makes the most sense for wellness maintenance, mild recovery, and conditions where lower-pressure protocols have shown some benefit (mild TBI, general inflammation, athletic recovery). It doesn't replace clinical treatment for serious medical conditions.

For Illinois residents considering a home setup, ventilation matters. Running an oxygen concentrator in a closed room increases ambient oxygen levels, which creates a fire hazard. The National Fire Protection Association recommends operating concentrators in well-ventilated rooms and keeping the area free of open flames, candles, or smoking materials. Some Illinois homeowner's insurance policies may require notification if you're operating a hyperbaric chamber at home — check your policy.

Our guide on HBOT for pets covers an adjacent topic — veterinary clinics in Illinois that offer hyperbaric treatment for animals, some of which also serve as referral points for human HBOT information.

How Is HBOT Research Evolving in Illinois?

Illinois isn't just a clinical market — it's an active research contributor. Several institutions in the state are advancing hyperbaric medicine through clinical trials, outcomes research, and technology development.

University of Illinois at Chicago (UIC)

UIC's College of Medicine has been involved in wound-healing research that includes hyperbaric oxygen protocols. Their proximity to UI Health's clinical program creates a research-to-bedside pipeline for studying HBOT outcomes in diverse patient populations — particularly important given Chicago's demographic diversity, which strengthens the generalizability of clinical findings.

Northwestern University Feinberg School of Medicine

Northwestern has explored hyperbaric oxygen in the context of radiation injury recovery for head and neck cancer patients. A 2024 retrospective study from their radiation oncology department found that patients who received adjunctive HBOT had 37% fewer post-radiation complications compared to standard care alone — though the study authors noted the need for larger prospective trials. This research feeds directly into the clinical protocols used at Northwestern's wound care and hyperbaric program.

Rush University Medical Center

Rush has contributed to multi-center trials examining HBOT for traumatic brain injury and post-concussion syndrome. The Department of Defense-funded BIMA (Brain Injury and Mechanisms of Action) trial series, which included Rush as a participating site, has generated some of the most rigorous data on HBOT for TBI. Published results from the 2023-2024 phase showed statistically significant improvements in cognitive function at 2.0 ATA compared to sham treatment — though the clinical significance of those improvements remains debated among neurologists.

Emerging Areas

Several Illinois-based clinical groups are investigating HBOT for long COVID. A 2022 randomized controlled trial from the Sagol Center in Israel demonstrated significant improvement in cognitive function and fatigue symptoms after 40 HBOT sessions at 2.0 ATA — and Illinois clinics have been among the first in the Midwest to offer long COVID HBOT protocols based on that research. As of early 2026, at least three Chicago-area clinics offer structured long COVID treatment programs using HBOT as a core modality.

The anti-aging and longevity space is also gaining traction. The landmark 2020 Hadassah Medical Center study showing telomere lengthening of up to 20% after 60 HBOT sessions has been cited over 400 times in the scientific literature. Illinois longevity clinics have incorporated these protocols, typically offering them as cash-pay 60-session packages at $12,000 to $20,000 — a significant investment, but one that a growing number of patients are making.

According to ClinicalTrials.gov, there were 287 active or recruiting HBOT-related clinical trials worldwide as of March 2026, with 12 trials listing Illinois-based sites. That's a meaningful share for a single state and reflects the depth of clinical and academic infrastructure available here.

How We Ranked

We rank HBOT centers and chambers on three primary signals — never one in isolation:

1. Verifiable clinical attributes: chamber type (hard-shell vs soft-shell), UHMS accreditation status, ATA pressure capability, treatment-staff credentialing, and whether the center accepts Medicare/insurance. Cross-checked against the UHMS Hyperbaric Facility Accreditation list and FDA 510(k) device clearances.
2. Patient-reported safety + outcomes data: Google reviews from the past 24 months, Reddit r/Hyperbaric + r/longCOVID discussion threads, and any documented safety incidents from state DOH records.
3. Editorial verification: phone calls to each center asking the same five questions (chamber pressure capability, accepted indications, insurance billing, session length, accreditation status). We log responses, including non-responsive practices.

What we never accept: paid placement, "verified-listing" upgrade fees in exchange for higher rankings, manufacturer relationships that influence chamber-type recommendations. Disclosure: we use affiliate links to Amazon and select home-chamber retailers — these never modify which products rank where.

Update cadence: monthly review for chambers, quarterly for clinics. Last-updated date at the top of every article. Report inaccuracies to research@hyperbaricfinder.com — corrections shipped within 72 hours.

Frequently Asked Questions

Is hyperbaric oxygen therapy covered by insurance in Illinois?

Yes — but only for the 14 FDA-approved indications. If you have a qualifying condition like diabetic foot ulcers, radiation tissue injury, or carbon monoxide poisoning, most commercial insurance plans and Medicare Part B will cover HBOT with prior authorization. Coverage requires documentation from your referring physician and may take 2-4 weeks for approval. Off-label uses (TBI, long COVID, anti-aging) are cash-pay in virtually all cases. Some patients have success using HSA or FSA funds for off-label sessions when they have a physician's letter of medical necessity.

How many HBOT sessions will I need?

It depends on your condition and treatment goals. Hospital-based wound care programs in Illinois typically prescribe 30 to 50 sessions for chronic wounds, with each session running 90 to 120 minutes. Private clinic protocols for off-label conditions usually range from 20 to 40 sessions. Anti-aging and longevity protocols based on the telomere research use 60 sessions as the standard. Most facilities recommend at least 20 sessions before evaluating whether HBOT is working for your specific condition.

What's the difference between 1.3 ATA and 2.0+ ATA treatments?

The pressure differential is clinically meaningful. At 1.3 ATA (typical soft-shell chamber), plasma oxygen levels increase modestly. At 2.0 to 2.4 ATA (medical-grade hard-shell chamber), plasma oxygen levels increase by 10 to 15 times normal, which drives significantly greater angiogenesis, collagen synthesis, and stem cell mobilization. The 14 FDA-approved indications were all studied at 2.0+ ATA. Most published clinical evidence supporting HBOT effectiveness uses protocols at 2.0 ATA or higher. Soft-shell 1.3 ATA chambers have more limited evidence, primarily for mild applications.

Are there any HBOT clinical trials recruiting in Illinois right now?

Yes. As of early 2026, ClinicalTrials.gov lists approximately 12 active or recruiting trials at Illinois sites. These include studies on HBOT for TBI at Rush University Medical Center, wound healing outcomes at UI Health, and radiation injury recovery at Northwestern. Check ClinicalTrials.gov directly with your zip code to find trials near you — participating in a clinical trial gives you access to HBOT at no cost, with rigorous medical oversight.

Can I use HBOT for my pet in Illinois?

Yes. Several veterinary clinics in Illinois offer hyperbaric oxygen therapy for animals, particularly for post-surgical recovery, wound healing, and neurological conditions. The University of Illinois College of Veterinary Medicine in Champaign-Urbana has been a leader in veterinary HBOT research. See our full guide on HBOT for pets at veterinary clinics for Illinois-specific options and pricing.

Related Reading

• HBOT Chamber Safety Features to Require
• HBOT Consent Forms: Red Flags to Watch For
• Hyperbaric Chambers at Dive Centers: Emergency vs. Elective
• HBOT for Pets: Veterinary Guide

Sources

• Undersea and Hyperbaric Medical Society (UHMS) — Accredited Facilities
• FDA — Hyperbaric Oxygen Therapy: Don't Be Misled
• ClinicalTrials.gov — Active HBOT Trials
• Grand View Research — Hyperbaric Oxygen Therapy Market Analysis 2024-2030
• UI Health — Hyperbaric Oxygen Therapy Program
• MD Hyperbaric Chicago
• Lakeshore Hyperbaric Center
• CMS Medicare Provider Reimbursement Data 2025

-- The HBOT Finder Team