Psychologist - 103T00000X
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A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
| Field | Value |
|---|---|
| Code | 103T00000X |
| Grouping | Behavioral Health & Social Service Providers |
| Classification | Psychologist |
| Specialization | — |
| Category | Individual |
NPI Registrations
70.6K NPIs are registered under this taxonomy code nationwide.
The table below splits that total by NPI type — Type 1 covers individual practitioners, Type 2 covers organizations and facilities — followed by the five states with the most NPIs registered under this taxonomy code.
| Field | Value |
|---|---|
| Registered NPIs | 70.6K |
| Type 1 (Individual) | 56.6K |
| Type 2 (Organizational) | 14.1K |
Frequently Asked Questions
References
- 1.Health Care Provider Taxonomy Code Set. National Uniform Claim Committee (NUCC). Retrieved Aug 11, 2026.The official registry of provider taxonomy codes used to classify individual and organizational health care providers by specialty on standard transactions such as claims, NPI enrollment, and prior authorization requests.
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