Adding Hyperbaric Oxygen Therapy to Your Practice: Certification, Billing & Compliance Requirements

Add hyperbaric oxygen therapy to your practice is a four-part project, not a single hardware purchase: Staff Certification, CPT/HCPCS Reimbursement Mechanics, Facility Compliance, and a Real Cost Picture all have to clear before a single patient visit can even be billed out.

Most other guides aimed at clinic owners address the hardware and stop; this guide tells you what happens after the chamber arrives — starting with staffing, billing, facility compliance, and the real cost picture, all covered below.

Is Your Practice Ready for Medical-Grade HBOT?

Prior to selecting a chamber, the practice needs to identify the path on which they actually reside. The FDA’s own product classification record recognizes the hyperbaric chambers as a Class II medical device (21 CFR 868.5470) and clears it via the 510(k) process, meaning it’s not GMP-exempt and designated as a life-sustaining/life-supporting device.

The significance is illustrated by that same FDA record’s list of Recognized Consensus Standards, which all cleared Class II devices are expected to adhere to, with the current version referencing NFPA 99:2024 and ASME PVHO-1-2023 (the prior editions, NFPA 99:2021 and ASME PVHO-1-2019, remain listed for devices cleared under earlier cycles).

FDA classification dictates two market pathways: soft-shell “mild” devices that max out at ~1.3-1.5 ATA and typically fall into the wellness and recovery niche, which may not require PVHO certification, and hard-shell medical devices capable of reaching 2.0-3.0 ATA. This latter group of medical devices must satisfy the complete regulatory compliance chain (FDA, ASME, NFPA) outlined here and would be what a hyperbaric physician would prescribe to treat an FDA-cleared condition. Failing to distinguish between the two tracks is the single most frequent strategic mistake in planning, since the facility, staffing, and billing requirements that follow all apply to the medical-grade hard-shell devices, and only partly-or not at all-to soft-shell systems.

From a mechanical standpoint, what’s occurring within the chamber is actually fairly basic (even if the compliance layer isn’t): pressurizing the chamber above normal air pressure levels allows the patient’s lungs to dissolve far more oxygen into their blood plasma than can be achieved by breathing at sea-level pressure. That higher concentration of oxygen levels boosts the amount of oxygen the blood cells can deliver to the patient through their circulatory system to support blood flow in getting the oxygen to the blood vessels who are in turn feeding oxygen-starved tissue-that’s the physiological basis of all 14 reimbursable indications covered in H2-3, from wound healing to decompression sickness.

One important data point to know before you part with your cash: A 2025 case in Michigan where a facility’s management and operating staff face criminal charges is a matter of public record. While the specifics are beyond the scope of this guide, the basic lesson is that the equipment is beside the point; the issue was what happens when accreditation, supervision and documentation rules are disregarded. Every requirement below is in the guide because there’s a corresponding negative consequence in the real world resulting from some gap in compliance.

Staffing: Technician Certification, Physician Training & Safety Director Requirements

Your hbot, which must be medically-grade, hard-shell in configuration, requires at least three different positions to be filled. None of these roles can be filled with “whomever’s available that day.”

The second is physician supervision. This is usually the biggest sticking point for new operators. NBDHMT requires (by their own published standard) that the facility’s CHT be immediately supported in every session by a physician trained in hyperbaric medicine (this can be a MD, DO, NP or PA). That doesn’t mean the doctor must be within a reasonable radius and on call; you must be able to staff for physician availability during all of your hours of operation. This is why most freestanding hbot facilities schedule their sessions into blocks rather than being open for walk-in patients throughout the day — each individual session commonly runs 1 to 1.5 hours, so a single physician-covered block can support several back-to-back patients.

Third is a safety director required for hard-shell chamber in the context of NFPA 99 regulations. This position is responsible for chamber operation procedures, fire safety equipment inspections and general emergency response protocols. You can train one of your existing CHTs to fill this position or hire a full-time officer as patient volume dictates.

“We didn’t add hyperbaric as a wellness amenity. We added it because the data on surgical recovery is unambiguous, and our patients deserve every advantage we can offer.”

Dr. Lisa Cassileth, Founder, The Practice Healthcare; Clinical Chief of Plastic Surgery, Cedars-Sinai

Field reports from practices that launch hbot programs consistently mention the same first mistake: hiring or training a technician, then finding out the required physician-availability component doesn’t mesh with the schedule. Doing the physician side first (figuring out who can cover the session times) then hiring or training a technician prevent an expensive re-tool.

Getting Paid: CPT Codes, HCPCS, and Insurance Reimbursement Mechanics

99183 CPT code reimbursement is only half the picture: hbot billing is typically broken down by two separate codes that many new practices don’t realize are two distinct codes. Code CPT 99183 is billed once per session to account for the physician’s presence/ supervision, regardless of session length. HCPCS G0277 (replacing C1300 on Jan 1, 2015) covers the facility/ chamber usage, billed in 30-minute units. Billed under one code, not both, or billed with incorrect unit logic for G0277 are known common reasons for denial.

Reimbursement, even for an FDA-approved indication, is not automatic. Medicare’s National Coverage Determination 20.29 (currently in effect, last reviewed April 2017 — roughly 9 years ago as of this writing) has an established list of conditions covered and specifies, for chronic wound care in particular, that it applies only if there are no measurable signs of healing after 30 days of conventional wound care. A 30-day time-gap trial, unaddressed or under-documented in your chart, is another leading cause of denial for hyperbaric billing specialists – not a coding error, but a documentation timing issue. Note, also, that NCDs specify what conditions are covered, not all details about individual claims processing; local contractor policies, prior authorizations, and payer-specific guidelines still come into play.

Unapproved indications like sports performance enhancement, cognitive boost, anti-aging, and the like, aren’t covered. While a cash-pay hbot program for these uses is perfectly legal, submitting these as covered treatments under an approved indication to circumvent insurance is exactly the type of activity that attracts federal investigation, and what forms the basis for the enforcement case described in H2-7.

Facility & Regulatory Compliance: What AHJ and Payers Actually Require

NFPA 99 is updated every 3 years and in the 2024 version included an update of specific importance to new installations: “Added requirements for new primary and secondary fire-suppression system for hyperbaric chambers.” Previously, the standard simply required a Class A chambers to include a prescriptive deluge-type water spray system plus a handline-end of story. That 2024 version maintains this requirement, but now allows for approved alternative-system solutions, giving clinics more flexibility in how they address this need. If your chamber vendor or installer quoted on an older version of NFPA 99, this is definitely worth chasing up directly.

We are not providing the full ASME PVHO-1 certification chain, the AHJ permitting checklist, or a model-by-model comparison in this article. Instead, these details are provided on MACY-PAN’s clinic compliance guide for hyperbaric chambers, which includes vendor documentation for certification records (ASME PVHO-1, ISO 13485, CE, SGS test reports) to be produced on request.

Choosing Your Chamber: Monoplace vs Multiplace, Hard-Shell vs Soft-Shell

With staffing, billing, and compliance covered, the decision between the types of chamber models comes down to relatively simple, fundamental business decisions around patient volume and floor plan. One of the simpler types is a monoplace chamber, which treats a single patient per session in a pure oxygen environment, and compared to another type like a multiplace chamber which treats several patients at a time on oxygen masks within a shared, ambient-air environment.

MACY-PAN’s clinical chamber selection guide, comparing the various ASME PVHO-1-certified monoplace and multiplace models and outlining specifications, offers a higher-level look, while our hard-shell hyperbaric chamber guide and soft-shell chamber guide dig into the specifics of the different configurations.

The Business Case: The 4-Layer HBOT Launch Cost Stack

In a great many practice-launch articles, discussions end at the chamber’s price sticker, not where actual launch costs lie – and the costs exist across four distinctly layered areas, missing even one of which is the leading cause of budget run-offs.

Our framework for this conversation deliberately exceeds that of a simple chamber ROI calculator to represent a complete launch budget picture, rather than how quickly one specific chamber pay for itself. For a specific chamber ROI calculation for a specific model against its peers (e.g., on its competitors’ pricing), please use our clinic payback model. For a comparison of the industry standard pricing for hyperbaric chambers, please see our hyperbaric chamber cost breakdown.

Common HBOT Launch Mistakes to Avoid

Three patterns, based on real-world data, can be observed again and again regarding how hbot billing and compliance go wrong – they aren’t risks, they’re reality.

Industry Outlook: What’s Changing in Clinical HBOT Right Now

If your practice is launching in 2026, the most significant change you’ll face isn’t the projected growth-it’s simultaneously tightening reimbursement scrutiny and increased facility requirements. Not only are hbot billing practices now specifically a target in the 2025 federal fraud crackdown, but as more wellness operations with soft-shell chambers claim “clinic-grade” status, AHJs and payers are scrutinizing whether those chambers actually possess current ASME PVHO-1 and NFPA 99 certification. This presents an opportunity for compliant practices and a risk for those that aren’t.

To put this in practical terms, before your 2026 launch, it’s worth taking two concrete steps: Confirm with your chamber vendor that they can provide certification in current editions of NFPA 99 and ASME PVHO-1 (NFPA 99:2024 and ASME PVHO-1-2023), rather than just previous versions, and make verification of the treating physician’s identifier part of your billing process from day one. NFPA 99 and ASME PVHO-1 are generally updated every 3 years, so expect at least one more compliance-related edition update between your 2026 launch and your first major equipment replacement cycle.

Just for reference (this information shouldn’t be substituted for diligent compliance planning and reimbursement strategy), various market research firms estimate the global hyperbaric oxygen therapy devices market to be worth about $4 billion by 2026, growing at a rate of around 5-6% per year through the early 2030s.

Updated: July 2026Reviewed by the MACY-PAN Technical Team