How to Choose a Hyperbaric Oxygen Therapy Clinic: 10 Questions to Ask

A good clinic will be glad you asked these. Each one comes with why it matters, what a good answer sounds like, and a red flag to watch for.

1. Will a physician assess me before treatment, and who directs my care?

Why it matters: Medical HBOT is a physician-directed treatment. In billing terms, physician attendance is its own service (CPT code 99183), which tells you how central the physician's role is.

A good answer: A named physician reviews your history, medications and goals before any session and stays responsible for your plan.

Red flag: You can book a package online without ever speaking to a physician.

2. What pressure and oxygen will I be treated at, and for how long?

Why it matters: The Undersea and Hyperbaric Medical Society (UHMS) defines HBOT as near-100% oxygen at 1.4 ATA or more, and every recognized indication uses 2.0 ATA or more.

A good answer: The pressure and session length are set by the physician for your specific condition.

Red flag: Vague answers, or a "mild" setting of about 1.3 ATA on room air offered for a medical condition.

3. What kind of chamber do you use, and what standards does it meet?

Why it matters: Medical chambers are pressure vessels built to the ASME PVHO-1 code and operated under NFPA 99 fire-safety rules. Soft fabric chambers are FDA-cleared only for acute mountain sickness.

A good answer: A clear description of the chamber type (hard-shell monoplace or multiplace) and the standards it is built and run to.

Red flag: A soft or inflatable chamber described as "the same" as medical HBOT. See how hard and soft chambers differ.

4. Who operates the chamber, and what training do they have?

Why it matters: The person at the controls monitors your pressure, oxygen and comfort for the whole session. Hyperbaric technologists and nurses can earn certification through the National Board of Diving and Hyperbaric Medical Technology (CHT for technologists, CHRN for nurses).

A good answer: Specific information about who runs sessions and how they were trained. Ask whether staff hold certification.

Red flag: No one can tell you who will be operating the chamber.

5. Is the facility accredited?

Why it matters: UHMS runs a voluntary accreditation program for hyperbaric facilities, and the FDA advises patients to seek care under a doctor at an accredited facility.

A good answer: A straight, truthful answer about accreditation status, whatever it is, and what standards the clinic follows.

Red flag: Evasive or unclear answers. Ask every clinic this question directly.

6. How do you screen for risks before I start?

Why it matters: HBOT is not right for everyone. Untreated pneumothorax (a collapsed lung) is an absolute contraindication, and some medicines, lung conditions, recent ear or sinus surgery, colds and seizure disorders need a physician's review first.

A good answer: A structured screening of your ears, lungs, medications and medical history before your first session. Learn more about screening and contraindications.

Red flag: No health questions beyond a signature on a waiver.

7. How will you communicate with my other doctors?

Why it matters: HBOT is used alongside other care, not instead of it. Your wound specialist, oncologist or ENT should know what is happening.

A good answer: With your permission, the clinic shares its assessment and progress with your treating doctors.

Red flag: A suggestion that HBOT can replace the treatment your doctors prescribed.

8. What will it cost, and how does insurance work?

Why it matters: A course is often 20 to 40 sessions, so the course total matters more than the per-session price. Published national guides put independent medical-grade centers at about $150 to $450 per session. Those are ranges, not quotes.

A good answer: Clear pricing for your physician-recommended plan before you commit, and an honest explanation of whether the clinic bills insurance. Read what HBOT costs and how insurance coverage works.

Red flag: Pressure to prepay for a large package before any physician assessment.

9. How many sessions will I need, and how will you decide to continue or stop?

Why it matters: For cleared indications, progress is measured, for example by wound size or a hearing test. Medicare, for instance, requires diabetic wounds to be re-evaluated every 30 days during HBOT.

A good answer: A plan with regular progress reviews and a clear point at which the physician reconsiders whether to continue.

Red flag: An open-ended number of sessions with no measures of progress.

10. What happens if something goes wrong during a session?

Why it matters: Serious problems are uncommon, but they happen. An oxygen-toxicity seizure, for example, occurs in roughly 1 in 5,000 to 10,000 treatments.

A good answer: Staff can describe their in-chamber safety and emergency procedures, and the clinic is honest about what kind of care it does and does not provide.

Red flag: "Nothing ever goes wrong."

When one session costs $75 and another costs $250, it is usually not the same service at two prices. Common reasons for lower prices include:

• Soft chambers. Published guides put wellness or spa soft-chamber sessions at about $75 to $150. These typically run at about 1.3 ATA on room air, which does not meet the medical definition of HBOT.
• No physician involvement. Physician assessment and supervision are real costs, and some providers leave them out.
• Shorter sessions. A typical medical session runs about 90 to 120 minutes including pressurization and depressurization.

Prices can also run the other way. Hospital outpatient departments carry facility costs, and published guides put hospital self-pay sessions at about $250 to $450. Compare chamber type, pressure and physician direction, not just price. For more, see hospital vs. independent HBOT centers.

We think you should ask us these questions too. Here are the answers we can give you plainly today. For the rest, ask us directly when you call, just as you would ask any clinic.