NPI numbers in California
1,185,300 active NPIs list a practice location in California.
988,008 individuals and 197,292 organizations. California ranks #1 of 56 states and territories.
Look up a provider in California
Most common specialties in California
| Primary specialty | Active NPIs | Share |
|---|---|---|
| Behavior Technician | 174,269 | 14.7% |
| Marriage & Family Therapist | 63,650 | 5.4% |
| Student in an Organized Health Care Education/Training Program | 40,832 | 3.4% |
| Clinical Social Worker | 37,991 | 3.2% |
| Pharmacist | 32,977 | 2.8% |
| Mental Health Counselor | 30,104 | 2.5% |
| Addiction (Substance Use Disorder) Counselor | 28,338 | 2.4% |
| Physical Therapist | 25,333 | 2.1% |
| General Practice Dentistry | 24,804 | 2.1% |
| Case Manager/Care Coordinator | 23,259 | 2.0% |
| Internal Medicine Physician | 22,046 | 1.9% |
| Behavior Analyst | 21,772 | 1.8% |
| Family Medicine Physician | 21,740 | 1.8% |
| Dentist | 19,647 | 1.7% |
| Family Nurse Practitioner | 17,412 | 1.5% |
Counts are active NPIs in the NPPES file of September 13, 2026, by the state of the practice location and each provider's primary specialty. They count records, not practicing clinicians.