How to Vet an HBOT Clinic: 5 Things to Check Before Booking

Look for UHMS accreditation, a named medical director with hyperbaric medicine credentials, hard chambers that reach your condition’s clinical ATA range, transparent per-session pricing, and honest informed consent that includes contraindications and realistic outcomes. If a clinic fails on any of these five criteria, keep looking.

Why Clinic Vetting Matters for HBOT

Hyperbaric oxygen therapy (HBOT) is one of the fastest-growing segments in regenerative medicine, but the industry has a quality problem. The FDA has issued warnings about clinics making unproven claims, federal prosecutors have secured convictions for HBOT billing fraud, and the gap between a UHMS-accredited hospital program and a strip-mall soft chamber operation is enormous.

As a patient, you are making a significant financial commitment. A typical HBOT protocol runs 20 to 40 sessions at $150 to $600 per session, totaling $3,000 to $24,000 out of pocket for off-label conditions. Choosing the wrong clinic doesn’t just waste money. It can mean receiving subtherapeutic treatment that gives you the impression HBOT “didn’t work” when the real problem was inadequate pressure, insufficient oxygen delivery, or a protocol that didn’t match your condition.

The Five Things to Check Before Booking

1. Board-Certified Medical Oversight

Every legitimate HBOT program should have a named medical director who is either board-certified in undersea and hyperbaric medicine or has completed a UHMS-recognized fellowship. The Undersea and Hyperbaric Medical Society (UHMS) maintains a physician certification program called PATH (Program for Advanced Training in Hyperbarics).

What to ask: “Who is your medical director, and what is their hyperbaric medicine certification?” If the answer is vague, or the person overseeing your treatment is a naturopath or chiropractor with a weekend course, that is a red flag. HBOT involves breathing 100% oxygen at elevated pressures. It requires real medical supervision.

What to look for: Staff should include Certified Hyperbaric Technologists (CHT) or Certified Hyperbaric Registered Nurses (CHRN). These are credentials issued through the National Board of Diving and Hyperbaric Medical Technology (NBDHMT).

2. ATA Range That Matches Your Condition

The therapeutic effect of HBOT depends on pressure. Different conditions require different pressures, and a clinic that only offers soft chambers at 1.3 ATA (atmospheres absolute) cannot deliver the same treatment as a hard chamber at 2.0 to 2.4 ATA.

Here is a general guide to the ATA ranges used in clinical protocols, based on UHMS-recognized and published evidence:

Condition	Typical Protocol ATA	Chamber Type Needed
Wound healing (diabetic foot ulcers)	2.0 – 2.4 ATA	Hard chamber
Traumatic brain injury	1.5 – 2.0 ATA	Hard chamber
Long COVID	2.0 ATA (Tel Aviv RCT protocol)	Hard chamber
Stroke recovery	1.5 – 2.0 ATA	Hard chamber
Anti-aging / longevity	2.0 ATA (Efrati et al., 2020, published in Aging)	Hard chamber
General wellness / mild recovery	1.3 ATA	Soft chamber acceptable
Radiation injury	2.0 – 2.4 ATA	Hard chamber

What to ask: “What ATA pressure do you treat my condition at, and why?” A clinic that puts everyone in a 1.3 ATA soft chamber regardless of condition is not practicing evidence-based HBOT. The Tel Aviv long COVID randomized controlled trial (Zilberman-Itskovich et al., 2022, published in Scientific Reports) used 2.0 ATA with 100% oxygen. The Efrati telomere study used 2.0 ATA. If a clinic tells you their 1.3 ATA soft chamber delivers the same results, ask for the specific study that supports that claim.

3. Real Informed Consent

A trustworthy HBOT clinic will tell you what can go wrong before you sign up. The most common side effect is middle ear barotrauma (ear pain during pressurization), which affects a meaningful percentage of patients. Other potential side effects include sinus pressure, temporary vision changes (myopia that resolves within weeks), oxygen toxicity seizures (rare at clinical pressures), and claustrophobia.

Red flag: A clinic that only talks about benefits during the consultation and brushes off side effects with “it’s completely safe” is not giving you real informed consent. HBOT is a medical procedure with a strong safety record, but it is not risk-free. The UHMS publishes clinical practice guidelines on contraindications and safety procedures that legitimate clinics follow.

What to ask:

• “What are the contraindications for HBOT?” (Untreated pneumothorax is an absolute contraindication. Certain medications and conditions require caution.)
• “What is your complication rate?”
• “What happens if I have a problem during a session?”
• “Do you have emergency protocols and is there a physician on call?”

4. Documented Protocols for Your Condition

A good clinic doesn’t offer a one-size-fits-all “wellness package.” They should have specific protocols for different indications, including the number of sessions, ATA pressure, session duration, and expected outcomes based on published evidence.

What to ask:

• “What is your protocol for [my condition], and what study is it based on?”
• “How many sessions does this protocol typically require?”
• “What outcomes should I realistically expect?”
• “How do you track my progress during the protocol?”

Red flag: If the answer to “what study is this based on?” is a blank stare or a vague reference to “research shows,” that clinic is not practicing evidence-based medicine. Legitimate protocols cite specific studies. For long COVID, that means the Tel Aviv RCT (40 sessions, 2.0 ATA, 100% oxygen, 90 minutes per session). For TBI, that means referencing Harch’s protocols or the military/civilian trial data.

5. Cost Transparency

HBOT pricing should be clearly published or provided upfront. You should know the per-session cost, package pricing (if available), and total estimated cost of your protocol before you commit.

Typical 2026 pricing ranges:

• Soft chamber session (1.3 ATA): $75 to $200
• Hard chamber session (1.5-2.4 ATA): $200 to $600
• 20-session package: $2,500 to $10,000
• 40-session package: $5,000 to $20,000

Red flags:

• No pricing available until after a “consultation” (often a sales pitch)
• High-pressure selling of large packages before you’ve tried a single session
• Refusing to offer per-session pricing (forcing you into a package)
• Pricing that is dramatically lower than competitors without explanation (could indicate soft chamber being presented as hard chamber treatment)

UHMS Accreditation: The Gold Standard

The single most reliable quality signal for an HBOT clinic is UHMS accreditation. The Undersea and Hyperbaric Medical Society’s facility accreditation program has surveyed and accredited over 267 facilities in nearly 20 years. The FDA specifically recommends that patients receive HBOT at UHMS-accredited facilities.

UHMS accreditation requires external review of medical protocols, clinical equipment, safety systems, staff qualifications, and operational practices. You can search for accredited facilities on the UHMS accredited facilities list.

However, UHMS accreditation mostly covers hospital-based and wound-care-focused programs. Many legitimate HBOT clinics treating off-label conditions (long COVID, TBI, anti-aging) are not UHMS-accredited because they operate outside the traditional hospital model. This doesn’t automatically make them bad. It means you need to evaluate the other four criteria even more carefully.

Specific Red Flags to Walk Away From

• Claiming HBOT “cures” cancer, autism, Alzheimer’s, or any other condition. No responsible clinic makes cure claims. HBOT may help manage symptoms or support recovery for certain conditions, but the language matters. “Cure” is a red flag.
• No medical director on staff. In multiple fraud cases, clinics billed for physician-supervised care when no qualified physician was involved.
• Only soft chambers but advertising for conditions that require hard chamber pressures. If a clinic is treating long COVID or TBI patients in 1.3 ATA soft chambers and implying equivalence to clinical-grade HBOT, they are misleading patients.
• Unable or unwilling to explain their protocol. “Trust us, we’ve been doing this for years” is not a protocol.
• No emergency procedures. A hard chamber operating at 2.0+ ATA needs fire suppression, emergency decompression protocols, and on-call medical support. If they can’t describe their emergency procedures, leave.
• Selling HBOT for conditions with no supporting evidence. While off-label use is legitimate under physician supervision, there is a line between emerging evidence and no evidence. A clinic selling HBOT for hair growth or weight loss has crossed it.

Questions to Bring to Your First Consultation

Print this list and bring it with you. A good clinic will welcome these questions. A bad one will be uncomfortable answering them.

1. Who is your medical director and what are their hyperbaric medicine credentials?
2. Are your technicians CHT or CHRN certified?
3. Is your facility UHMS accredited? If not, what quality standards do you follow?
4. What ATA pressure do you use for my condition, and what study supports that protocol?
5. How many sessions does your protocol require, and what outcomes should I expect?
6. What are the side effects and contraindications?
7. What is your per-session cost and total protocol cost?
8. Can I start with a single session before committing to a package?
9. What are your emergency procedures?
10. Do you use hard chambers, soft chambers, or both?

Frequently Asked Questions

What credentials should an HBOT clinic have?

At minimum, a named medical director with hyperbaric medicine training (UHMS PATH certification or equivalent), certified hyperbaric technologists (CHT), and preferably UHMS facility accreditation. For off-label clinics not in the hospital system, verify the medical director’s credentials independently through state medical board searches.

Is a soft chamber clinic legitimate?

Soft chamber clinics can be legitimate for general wellness and mild recovery at 1.3 ATA. They are not legitimate replacements for medical HBOT at 1.5 to 2.4 ATA for conditions like long COVID, TBI, stroke, or wound healing. If a soft chamber clinic is advertising treatment for these conditions, that is a red flag.

How do I verify UHMS accreditation?

Search the UHMS accredited facilities directory online. If a clinic claims to be UHMS-accredited but does not appear in the directory, ask for their accreditation certificate and verify directly with UHMS.

Should I choose a hospital-based or independent HBOT clinic?

Hospital-based programs are typically UHMS-accredited and treat FDA-approved indications with insurance coverage. Independent clinics offer more flexibility for off-label conditions but vary widely in quality. Neither is inherently better. Apply the five criteria above to either type.

What if a clinic won’t answer these questions?

Find a different clinic. A provider who is confident in their qualifications, protocols, and safety standards will welcome informed patients. Evasiveness about credentials, protocols, or pricing is one of the strongest red flags in HBOT.

Sources

• Undersea and Hyperbaric Medical Society. “UHMS Hyperbaric Facility Accreditation Program.” uhms.org
• FDA. “Hyperbaric Oxygen Therapy: Unproven Claims Include Treating Diabetes and Autism.” fda.gov
• Zilberman-Itskovich S, et al. “Hyperbaric oxygen therapy improves neurocognitive functions and symptoms of post-COVID condition.” Scientific Reports, 2022.
• Efrati S, et al. “Hyperbaric oxygen therapy can diminish fibromyalgia syndrome.” Aging, 2020.
• Harch PG. “Systematic Review and Dosage Analysis: HBOT Efficacy in Mild TBI.” Frontiers in Neurology, 2022.
• Federal-Lawyer.com. “Hyperbaric Oxygen Therapy Fraud Investigations.”