227900000X — Registered Respiratory Therapist

227900000X is the NUCC provider taxonomy code for Registered Respiratory Therapist (individual providers). 4,435 providers in our latest NPPES snapshot list it as their primary taxonomy.

Taxonomy code	227900000X
Display name	Registered Respiratory Therapist
Grouping	Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Classification	Respiratory Therapist, Registered
Section	Individual
Directory	Respiratory Therapist, Registered provider directory

Definition

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 from the NUCC Health Care Provider Taxonomy code set.

Related taxonomy codes

2279C0205X — Critical Care Registered Respiratory Therapist (Respiratory Therapist, Registered)
2279E1000X — Educational Registered Respiratory Therapist (Respiratory Therapist, Registered)
2279E0002X — Emergency Care Registered Respiratory Therapist (Respiratory Therapist, Registered)
2279G1100X — General Care Registered Respiratory Therapist (Respiratory Therapist, Registered)
2279G0305X — Geriatric Care Registered Respiratory Therapist (Respiratory Therapist, Registered)
2279H0200X — Home Health Registered Respiratory Therapist (Respiratory Therapist, Registered)
2279P3900X — Neonatal/Pediatric Registered Respiratory Therapist (Respiratory Therapist, Registered)
2279P3800X — Palliative/Hospice Registered Respiratory Therapist (Respiratory Therapist, Registered)

Frequently asked questions

What does taxonomy code 227900000X mean?

227900000X is the NUCC Health Care Provider Taxonomy code for Registered Respiratory Therapist in the "Respiratory, Developmental, Rehabilitative and Restorative Service Providers" grouping. It classifies individual providers.

Where is the taxonomy code used?

Providers select a taxonomy code when applying for an NPI, and it appears on insurance claims (CMS-1500 box 33b / 837 electronic claims) to identify the provider's classification. Payers may require the taxonomy that matches your credential and license.

How do I find providers with taxonomy 227900000X?

Browse the Respiratory Therapist, Registered directory, or use the NPI search and filter by state.

Source: CMS NPPES (public data). Snapshot 2026-07-09.