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Healthcare providers in Wisconsin: NPI counts by specialty

This page summarizes active National Provider Identifier (NPI) records with a practice location in Wisconsin, using data from the CMS NPPES registry. It reports 137,132 records, shows that 26,385 (19.2%) are flagged as sole proprietors, and lists the largest specialties with their record counts. These measures describe registry records and classifications, rather than a complete count of individual clinicians or organizations.

Statewide totals

Active NPI records137,132
Registered sole proprietors26,385 (19.2%)

The 26,385 records flagged as sole proprietors represent 19.2% of the Wisconsin records in this view. This flag is self-reported and is an imperfect proxy for private practice, so it should not be treated as a definitive measure of independent practice.

Largest specialties in this state

SpecialtyActive NPIs
Physical Therapist6,603
Pharmacist5,403
Registered Nurse5,089
Family Medicine Physician3,993
Chiropractor3,987
Professional Counselor3,962
Clinical Social Worker3,747
Student in an Organized Health Care Education/Training Program3,700
Occupational Therapist3,690
Nurse Practitioner3,406
Physician Assistant3,204
Addiction (Substance Use Disorder) Counselor3,057
Internal Medicine Physician3,003
Mental Health Counselor2,926
General Practice Dentistry2,921
Speech-Language Pathologist2,919
Family Nurse Practitioner2,604
Physical Therapy Assistant2,180
Social Worker2,060
Dentist2,054
Durable Medical Equipment & Medical Supplies1,730
Licensed Practical Nurse1,717
Optometrist1,662
Case Manager/Care Coordinator1,565
Behavior Technician1,484
Registered Dietitian1,474
Occupational Therapy Assistant1,451
Emergency Medicine Physician1,440
Pediatrics Physician1,377
Athletic Trainer1,366
Anesthesiology Physician1,361
Certified Registered Nurse Anesthetist1,100
Counselor1,086
Diagnostic Radiology Physician1,009
Psychologist980
Marriage & Family Therapist969
Psychiatry Physician941
Dental Hygienist927
Home Health Agency880
Surgery Physician855

Source: CMS National Plan and Provider Enumeration System (NPPES) Data Dissemination file, FOIA-disclosable public data under CMS-6060-N. Aggregated by Hero EMR on 2026-08-03; deactivated NPIs excluded; specialty assigned from the primary taxonomy code (NUCC 25.1). Counts below 11 are suppressed. Individual providers are never published. All provider data pages.

Common questions

What does the Wisconsin total represent?

It is the number of active NPI records with a practice location in Wisconsin in the CMS NPPES registry. It is a record count, not necessarily a count of unique people.

Which specialties have the largest counts?

The largest listed specialties are Physical Therapist (6,603), Pharmacist (5,403), Registered Nurse (5,089), Family Medicine Physician (3,993), and Chiropractor (3,987).

Does the sole-proprietor flag identify private practices?

No. The flag is self-reported and is an imperfect proxy for private practice.

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