Provider taxonomy code lookup

Behavior Technician is the single most-used code; physicians spread across 236 codes

1,244,616 records use one of the 236 allopathic and osteopathic physician codes, about twice the behavior technician count, but no single physician code comes close.

Source: NUCC Health Care Provider Taxonomy, version 26.1 (nucc.org); CMS NPPES primary taxonomy, file of Aug 9, 2026 (cms.gov).

What the most-used codes mean, in NUCC's words

106S00000X Behavior Technician

The behavior technician is a paraprofessional who practices under the close, ongoing supervision of a behavior analyst or assistant behavior analyst certified by the Behavior Analyst Certification Board and/or credentialed by a state (such as through licensure). (NUCC)

1041C0700X Clinical Social Worker

A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. (NUCC)

183500000X Pharmacist

An individual licensed by the appropriate state regulatory agency to engage in the practice of pharmacy. (NUCC)

390200000X Student in an Organized Health Care Education/Training Program

An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care. (NUCC)

225100000X Physical Therapist

Physical therapists (PTs) are licensed health care professionals who diagnose and treat individuals of all ages, from newborns to the very oldest, who have medical problems or other health-related conditions that limit their abilities to move and perform functional activities in their daily lives. (NUCC)

235Z00000X Speech-Language Pathologist

The speech-language pathologist is the professional who engages in clinical services, prevention, advocacy, education, administration, and research in the areas of communication and swallowing across the life span from infancy through geriatrics. (NUCC)

363A00000X Physician Assistant

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. (NUCC)

171M00000X Case Manager/Care Coordinator

A person who provides case management services and assists an individual in gaining access to needed medical, social, educational, and/or other services. (NUCC)

207Q00000X Family Medicine Physician

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. (NUCC)

207R00000X Internal Medicine Physician

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. (NUCC)

All 688 codes in use, by NUCC grouping

7,327,918 NPPES records in all, each counted once under its primary code.