Registered Respiratory Therapist: NPI taxonomy code 227900000X
Taxonomy code 227900000X is Respiratory Therapist, Registered, in the Respiratory, Developmental, Rehabilitative and Restorative Service Providers group.
4,514 active NPIs list it as their primary specialty (<0.1% of all).
| Code | 227900000X |
|---|---|
| Group | Respiratory, Developmental, Rehabilitative and Restorative Service Providers |
| Classification | Respiratory Therapist, Registered |
| Used for | individual providers (the code is in NUCC's Individual section) |
| Active NPIs, primary specialty | 4,514 (4,425 individuals, 89 organizations) |
What NUCC says: A Registered Respiratory Therapist (RRT) is an advanced therapist who has passed standardized written and clinical simulation examinations administered by the National Board for Respiratory Care (NBRC). (excerpt of the NUCC 26.1 definition)
Find Registered Respiratory Therapist providers
Search the registry for providers listing Respiratory Therapist, Registered. Pick a state to narrow it down.
Where they are
| State | Active NPIs | Share |
|---|---|---|
| California | 1,089 | 24.1% |
| Florida | 620 | 13.7% |
| Texas | 228 | 5.1% |
| Arizona | 202 | 4.5% |
| Washington | 187 | 4.1% |
| North Carolina | 177 | 3.9% |
| Tennessee | 141 | 3.1% |
| Ohio | 130 | 2.9% |
| Michigan | 112 | 2.5% |
| New York | 103 | 2.3% |
Top states by practice location, from the NPPES file of September 13, 2026.
Related specialties
- Critical Care Registered Respiratory Therapist 525
- General Care Registered Respiratory Therapist 435
- Home Health Registered Respiratory Therapist 196
- Neonatal/Pediatric Registered Respiratory Therapist 193
- Pulmonary Rehabilitation Registered Respiratory Therapist 118
- Pulmonary Function Technologist Registered Respiratory Therapist 104
- Pulmonary Diagnostics Registered Respiratory Therapist 85
- Educational Registered Respiratory Therapist 77
Specialty definitions are from the NUCC Health Care Provider Taxonomy (version 26.1). Which code to use on a claim depends on your NPPES record and your payer. See taxonomy codes explained.