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Medical Specialty Clinic/Center: how many are there, and how many are in private practice?

Medical Specialty Clinic/Center (NUCC 261QM2500X) covers an entity, facility, or distinct part of a facility that provides diagnostic, treatment, and prescriptive services for a specific medical specialty. This page summarizes active U.S. NPI records using that primary taxonomy and shows the reported sole-proprietor share, leading states, and patterns in when records were first enumerated. These measures describe an NPI footprint, not service volume.

National totals

Active NPI records6,351
Registered sole proprietors125 (2.0%)
NUCC taxonomy code261QM2500X
GroupingAmbulatory Health Care Facilities

What this specialty covers

An entity, facility, or distinct part of a facility providing diagnostic, treatment, and prescriptive services related to a specific area of medical specialization. Frequently used for Title V related Children's Specialty services or to meet specific public health needs (e.g., infectious diseases or breast and cervical cancer).

Reading the sole-proprietor share

For this specialty, a sole-proprietor flag identifies an NPPES record that reports that status; 125 records, or 2.0%, are flagged. It is an imperfect proxy for private practice because the field is self-reported and Medical Specialty Clinic/Center records can represent facilities or entities serving specialized or public-health needs, rather than independently owned clinician practices.

By state

StateActive NPIsSole proprietorsShare
California891293.3%
Florida556<11not reported
Texas429<11not reported
New York384<11not reported
Illinois240<11not reported
New Jersey227<11not reported
Oklahoma216<11not reported
Georgia198<11not reported
Arizona174<11not reported
Michigan170<11not reported
North Carolina167<11not reported
Colorado164<11not reported
Washington153<11not reported
Maryland142<11not reported
Pennsylvania135<11not reported
Oregon132<11not reported
Ohio129<11not reported
Virginia118<11not reported
Missouri115<11not reported
Tennessee103<11not reported
Louisiana98<11not reported
South Carolina92<11not reported
Minnesota87<11not reported
Alabama84<11not reported
Massachusetts81<11not reported
Utah66<11not reported
Indiana65<11not reported
Nevada59<11not reported
Mississippi57<11not reported
Arkansas57<11not reported
Wisconsin55<11not reported
Hawaii52<11not reported
Connecticut44<11not reported
Kentucky42<11not reported
New Mexico39<11not reported
Idaho36<11not reported
West Virginia35<11not reported
Iowa34<11not reported
Montana31<11not reported
Alaska27<11not reported
Nebraska27<11not reported
Kansas23<11not reported
South Dakota19<11not reported
District of Columbia19<11not reported
Maine18<11not reported
Delaware18<11not reported
Rhode Island14<11not reported
New Hampshire13<11not reported
North Dakota12<11not reported
Wyoming12<11not reported
Vermont11<11not reported

New NPI registrations by year

Year first enumeratedNPIs
2016274
2017197
2018145
2019167
2020211
2021188
2022164
2023187
2024226
2025244

Counts reflect the year each NPI was first issued, among records still active today. The final year is partial: this data covers through 2026-01-11.

Data notes

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

How many Medical Specialty Clinic/Center providers are in the United States?

There are 6,351 active NPI records nationally with Medical Specialty Clinic/Center as the primary taxonomy. This is a count of records, not necessarily a count of distinct clinics, locations, or clinicians.

How many Medical Specialty Clinic/Center organizations are in private practice?

NPPES flags 125 records, or 2.0%, as sole proprietors. This is an imperfect proxy for private practice because the field is self-reported and does not fully describe ownership or operating structure.

Which states have the most Medical Specialty Clinic/Center NPIs?

The largest state counts are California (891), Florida (556), Texas (429), New York (384), and Illinois (240).

Does the number of Medical Specialty Clinic/Center NPIs equal the number of clinics in the United States?

No. The total counts active NPI records with this primary taxonomy, and NPI records do not map one-to-one to clinics, locations, clinicians, or service capacity.

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