The Undersea and Hyperbaric Medical Society counts well over 1,000 hyperbaric programs operating in the United States as of Q1 2025, the most authoritative national figure available. Within the private market, a vetted directory count puts 786 verified clinics offering hyperbaric oxygen therapy across the US as of April 2026. No single registry captures every provider, so counts vary by definition and method.
Cite this data
Plain text: Regenerated.com verified clinic directory, April 2026 snapshot (786 verified US clinics offering hyperbaric oxygen therapy), via BaricBoost.com. National program estimate: UHMS, well over 1,000 hyperbaric programs, Q1 2025.
APA: BaricBoost. (2026). How many HBOT clinics are in the US? Verified count from the Regenerated.com clinic directory (April 2026 snapshot, 786 clinics). Retrieved from https://baricboost.com/how-many-hbot-clinics-in-the-us/
Canonical URL: https://baricboost.com/how-many-hbot-clinics-in-the-us/
Jump to a dataset: US facilities by type · Top states by facility count · Verified clinics by state · Verified clinics by city
How Many HBOT Providers Are in the US?
Well over 1,000 hyperbaric programs operate in the United States as of Q1 2025, per the Undersea and Hyperbaric Medical Society.1 Programs range from academic medical centers running multiplace chambers to freestanding clinics with a single monoplace unit, and no single registry captures them all. The count of individual hyperbaric chambers is higher, since each program typically operates more than one.
Facilities by Type
| Facility Type | Count | Trend |
|---|---|---|
| Hospital-based wound care/HBOT centers | 800-1,000 | Stable (2-3% growth) |
| Freestanding HBOT clinics | 350-500 | Fast growth (15-20%/yr) |
| Integrative/functional medicine (HBOT as add-on) | 150-200 | Growing (10-15%/yr) |
| Military/VA facilities | 40-50 | Stable |
| Emergency/dive medicine | 40-50 | Stable/slight decline |
Last verified: Q1 2025. Figures are industry estimates anchored to the UHMS 2025 Q1 program count and category growth rates, not a live registry export.
How Have US HBOT Provider Numbers Grown Since 1977?
US hyperbaric capacity has grown roughly 40-fold in five decades, from 27 chambers in 1977 to well over 1,000 programs in 2025. A 1981 article in JAMA documented approximately 93 hyperbaric chambers in the US, up from just 27 in 1977, a nearly 4-fold increase in four years.6 The UHMS reports well over one thousand programs today, each typically running multiple chambers, so the number of individual chambers now far exceeds the number of programs.
HBOT Clinic Growth by Decade
The US hyperbaric therapy industry has grown in distinct phases, each driven by different catalysts:
- 1970s-1980s: Military and diving medicine dominated. From 27 chambers in 1977 to 93 in 1981, growth was driven by Navy decompression research and the formation of the UHMS in 1967. Nearly all facilities were hospital or military based.
- 1990s-2000s: Medicare began covering HBOT for wound care in the late 1990s, triggering hospital wound care center expansion. Healogics (then Curative Health Services) and RestorixHealth built management chains of 200 to 400+ locations. By the mid-2000s, hospital-based programs numbered in the hundreds.
- 2010s: Freestanding clinics emerged as monoplace chamber costs dropped below $150,000. The off-label market for TBI, autism research, and sports recovery drove independent clinic openings at 15 to 20% annual growth rates.
- 2020s: Long COVID created a surge in patient demand starting in 2022. The Tel Aviv RCT demonstrating cognitive improvement in long COVID patients accelerated freestanding clinic openings. Integrative medicine practices adding HBOT as a service line grew 10 to 15% annually.
Which States Have the Most HBOT Clinics?
Florida, Texas, and California lead the country on total HBOT facility count, together holding an estimated 390 to 480 providers. The table below estimates facilities per state and normalizes by population, which reshuffles the ranking: Arizona and Florida top the per-capita list even though the raw counts favor the largest states.
Top States by HBOT Facility Count
| Rank | State | Est. Facilities | Facilities per 1M Pop. |
|---|---|---|---|
| 1 | Florida | 140-170 | 6.3 |
| 2 | Texas | 130-160 | 4.3 |
| 3 | California | 120-150 | 3.1 |
| 4 | New York | 70-90 | 3.6 |
| 5 | Arizona | 50-65 | 6.8 |
| 6 | Pennsylvania | 50-60 | 3.8 |
| 7 | Ohio | 45-55 | 3.8 |
| 8 | Colorado | 35-45 | 5.9 |
Last verified: Q1 2025. State counts are industry estimates derived from the national program figure and regional density; per-capita figures use US Census population estimates.
How Many Verified HBOT Clinics Operate in Each State?
As of the April 2026 dataset, 786 verified clinics offer hyperbaric oxygen therapy, led by California (151), Texas (127), and Florida (70). These numbers come from Regenerated.com, a vetted directory of 9,932 verified US regenerative health clinics operated by BaricBoost’s founder. They are individually checked listings, not extrapolations, which makes this one of the few independently verifiable HBOT provider counts published anywhere.
Because the directory covers regenerative and integrative clinics rather than hospital wound-care programs, treat these figures as a verified floor for the private HBOT market, not a total market count.
Verified HBOT Clinics by State (Top 20)
| Rank | State | Verified HBOT Clinics |
|---|---|---|
| 1 | California | 151 |
| 2 | Texas | 127 |
| 3 | Florida | 70 |
| 4 | Arizona | 49 |
| 5 | Georgia | 40 |
| 6 | New York | 37 |
| 7 | Colorado | 36 |
| 8 | Illinois | 35 |
| 9 | Nevada | 26 |
| 10 | Virginia | 23 |
| 11 | Washington | 21 |
| 12 | Maryland | 18 |
| 13 | Oklahoma | 16 |
| 14 | Oregon | 15 |
| 15 | Pennsylvania | 15 |
| 16 | Tennessee | 14 |
| 17 | Indiana | 11 |
| 18 | Nebraska | 8 |
| 19 | Kentucky | 8 |
| 20 | Ohio | 7 |
Last verified: April 2026 (Regenerated.com verified directory snapshot, 786 clinics offering HBOT).
Top 10 Cities by Verified HBOT Clinic Count
| Rank | City | Verified HBOT Clinics |
|---|---|---|
| 1 | Miami, FL | 27 |
| 2 | Los Angeles, CA | 24 |
| 3 | Houston, TX | 23 |
| 4 | Las Vegas, NV | 21 |
| 5 | New York, NY | 19 |
| 6 | Dallas, TX | 19 |
| 7 | Atlanta, GA | 17 |
| 8 | Scottsdale, AZ | 11 |
| 9 | San Diego, CA | 11 |
| 10 | Mesa, AZ | 10 |
Last verified: April 2026 (Regenerated.com verified directory snapshot, 786 clinics offering HBOT).
Methodology: Counts reflect clinics in the Regenerated.com verified directory (April 2026 snapshot of 786 HBOT-offering clinics, drawn from 9,932 verified regenerative health listings) whose treatment list includes hyperbaric oxygen therapy. Each listing passed a multi-step verification pipeline covering website liveness, duplicate detection, address validation, and treatment confirmation. Cite as: “Regenerated.com verified clinic directory, April 2026, via BaricBoost.com.”
How Is the HBOT Market Split Between Hospital and Freestanding Clinics?
Hospital wound-care centers still make up the largest share of US HBOT providers, but freestanding and integrative clinics are taking the growth. In 2015, hospital wound care centers represented an estimated 75 to 80% of all HBOT providers. By 2025, that share has dropped to roughly 55 to 65%, with freestanding and integrative clinics capturing the difference. This shift is also visible in the growing HBOT market size.2
Several factors drive this shift. Hospital wound care consolidation under management companies (Healogics manages 600+ wound care centers, though not all offer HBOT) has kept hospital counts stable but not growing. Meanwhile, the cash-pay off-label market faces no insurance authorization barriers, creating a more attractive business model for independent operators. A single monoplace hard shell chamber can be purchased for $100,000 to $200,000, with annual operating costs of $50,000 to $100,000, making independent clinic ownership feasible in markets with sufficient demand.
For patients, this market shift has practical implications. Hospital programs offer insurance coverage and treating physician oversight but limited scheduling flexibility and longer wait times. Freestanding clinics offer immediate availability and flexible scheduling but require cash payment, typically $200 to $400 per session. See our HBOT cost guide for full pricing details.
Where Are the Gaps in US HBOT Access?
Access is uneven despite 1,000+ programs nationwide. The top 8 states by facility count (Florida, Texas, California, New York, Arizona, Pennsylvania, Ohio, Colorado) hold an estimated 60% of all HBOT providers but only about 50% of the US population, so patients in low-density states travel farther for care and see a smaller share of the roughly patients treated each year.
- Rural access: Provider density is concentrated in a handful of states. In sparsely populated states like Montana, Wyoming, and the Dakotas, the nearest provider may be 200+ miles away. For conditions requiring 30 to 40 daily treatments, that distance can effectively rule out outpatient HBOT without relocation.
- Multiplace chambers: Only approximately 100 to 150 multiplace chambers exist in the US, limiting access for patients who need higher-pressure treatment or have claustrophobia concerns.
- Emergency capability: Only 40 to 50 facilities nationwide maintain 24/7 emergency recompression capability, concentrated in coastal areas with diving communities and at major trauma centers.
How Does US HBOT Capacity Compare Globally?
The US leads the world in absolute provider count, but not in per-capita utilization. As of 2020, China had 1,924 institutions offering HBOT with 2,699 chambers and 11,266 practitioners, according to a nationwide survey published in Undersea & Hyperbaric Medicine.7 Israel has the highest per-capita HBOT utilization globally, driven by national insurance coverage for select off-label indications and the Sagol Center’s large-scale programs.
Sources
- UHMS 2025 Q1 Report. Undersea and Hyperbaric Medical Society. uhms.org
- Precedence Research. Hyperbaric Oxygen Therapy Market Size 2025-2034. precedenceresearch.com (see our HBOT market size analysis)
- CMS. Medicare Provider Enrollment Data. cms.gov
- UHMS. Accredited Clinical Hyperbaric Facilities. uhms.org
- Divers Alert Network (DAN). Emergency Recompression Chamber Network. diversalertnetwork.org
- Gunby P. (1981). HBO: new chambers, some growing pains. JAMA. DOI: 10.1001/jama.1981.03320110005003
- Zhang Y, Yang J, Li JS, et al. (2022). Clinical application of hyperbaric oxygen therapy in China: A 2020 baseline survey. Undersea & Hyperbaric Medicine, 49(2), 179-190. DOI: 10.22462/03.04.2022.3
- Fife C, Eckert K. (2018). The Hyperbaric Oxygen Therapy Registry: Driving Quality and Demonstrating Compliance. Undersea & Hyperbaric Medicine, 45(1). DOI: 10.22462/01.02.2018.1
- National Board of Diving & Hyperbaric Medical Technology (NBDHMT). Certified Facilities. nbdhmt.org
Medical Disclaimer
The content on BaricBoost.com is for informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.
Author
Seph Fontane Pennock is the founder of BaricBoost.com and Regenerated.com, a clinic directory for regenerative medicine serving 10,000+ providers across the United States. He previously built and sold PositivePsychology.com, which grew to 19 million users and became the largest evidence-based positive psychology resource on the web. Seph brings direct experience as an HBOT patient, having completed protocols at clinics across three continents while navigating mold illness, systemic inflammation, and autoimmune conditions. His treatment journey includes hyperbaric oxygen therapy, peptide protocols, NAD+ therapy, and consultations with specialists from Dubai to Cape Town to Mexico. This combination of entrepreneurial track record and lived patient experience shapes everything published on BaricBoost.com. Every article is grounded in peer-reviewed research, informed by real clinical encounters, and written for patients making high-stakes treatment decisions. Seph's focus is on bringing transparency, scientific rigor, and practical guidance to the hyperbaric oxygen therapy space.
