Registered Respiratory Therapist
4,457 active US providers register Registered Respiratory Therapist as their primary taxonomy. That is 0.05% of every provider in the registry, and the 200th largest of 584 specialties with a page here.
- Taxonomy code
- 227900000X
- Grouping
- Respiratory, Developmental, Rehabilitative and Restorative Service Providers
- Classification
- Respiratory Therapist, Registered
- Active providers
- 4,457
- States covered
- 51 of 51
What the code means
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). In addition, to the certified therapist (CRT) entry level skills, RRTs have advanced education and training in patient assessment, in the development and modification of patient care plans, and in assuring the appropriate utilization of respiratory care resources. An RRT is a graduate of an associate or baccalaureate degree producing educational programs approved by the Commission on Accreditation of Allied Health Education Programs (CAAHEP) and where applicable, is licensed by the state and is practicing within the scope of that license.
Definition quoted verbatim from the NUCC Health Care Provider Taxonomy code set, version 25.1. Not paraphrased.
Where they are
Counted by practice location, not by mailing address or by licence state. A provider practising across a state line is counted where they practise.
| State | Providers | Share |
|---|---|---|
| California | 1,087 | |
| Florida | 617 | |
| Texas | 223 | |
| Arizona | 196 | |
| Washington | 183 | |
| North Carolina | 176 | |
| Tennessee | 140 | |
| Ohio | 129 | |
| Michigan | 108 | |
| New York | 101 | |
| Georgia | 100 | |
| Missouri | 78 | |
| South Carolina | 64 | |
| Virginia | 63 | |
| Nevada | 61 |
Showing the 15 largest of 51 states with at least one.
Who registers under this code
4,372 of these are people and 85 are organisations, so 2% of the code is businesses rather than clinicians. Half of them had registered by 2019, and 1,668 registered in the last five years, 37% of the current population.
That is close to the pace of the registry as a whole.
Where the practices are
By practice-location city. City counts are noisier than state counts, because a large employer files one address for many providers.
- LOS ANGELES, CA199
- SEATTLE, WA150
- TUCSON, AZ81
- SAN DIEGO, CA66
- TAMPA, FL57
- SAN ANTONIO, TX56
- MIAMI, FL55
- GAINESVILLE, FL54
- SANTA CLARA, CA54
- LIVINGSTON, TN54
What else they list
Providers whose primary code is Registered Respiratory Therapist most often carry these secondary taxonomies as well. This is the closest thing the registry has to a map of which specialties overlap in practice, and it is not published anywhere else.
| Also listed | Providers | Share |
|---|---|---|
| Certified Respiratory Therapist | 50 | 1.1% |
| Critical Care Registered Respiratory Therapist | 45 | 1.0% |
| Neonatal/Pediatric Registered Respiratory Therapist | 39 | 0.9% |
| Home Health Registered Respiratory Therapist | 34 | 0.8% |
| Educational Registered Respiratory Therapist | 34 | 0.8% |
| General Care Registered Respiratory Therapist | 32 | 0.7% |
| Pulmonary Function Technologist Registered Respiratory Therapist | 29 | 0.7% |
| Pulmonary Diagnostics Registered Respiratory Therapist | 27 | 0.6% |
Nearby specialties
Other taxonomies NUCC files under Respiratory Therapist, Registered.
Looking up a specific provider
These counts come from the monthly NPPES file. To check one provider, use their NPI: the lookup reads the live registry and shows whether the identifier is still active, which the monthly file cannot tell you about the last few weeks.
Counts from npidata_pfile_20050523-20260712.csv, built 2026-08-09. Primary taxonomy only, deactivated identifiers excluded.