Psychologist

Compiled from official public sources by the editorial process.

NUCC 103T00000X

47,555 CMS NPPES-registered providers across 56 states · 39th of 690 specialties by headcount.

47,555

Providers

CMS NPPES-registered

States

with ≥1 NPI

California

Top state

7,050 providers

$2K

Open Pay avg

201st of 552 specialties

Where this specialty sits in the corpus

Psychologist ranks 39th of 690 NUCC specialties by CMS NPPES headcount (0.67% of all registered NPIs), densest in California; per resident District of Columbia leads.

47,555
NPPES providers in specialty: 39th
of 690 specialties: 545
state-share HHI: 0.2%
Part D prescriber share

District of Columbia is densest per capita (3.5× the national rate; Vermont 2.8×).

Taxonomy fingerprint

Psychologist (NUCC 103T00000X; 0.2% Part D prescribers (105 of 47,555); avg 760 Part D claims/prescriber (204th of 567); Open Payments avg $2K/physician (201st of 552; 36 paid, $67K total); state-share HHI 545; next-larger headcount neighbor Athletic Trainer (+606); next-smaller Home Health Aide (-433)).

Next larger: Athletic Trainer (48,161) Next smaller: Home Health Aide (47,122)

Population-adjusted state index

Each multiple is this specialty's providers-per-resident in a state divided by the national rate (Census Vintage population estimates). Raw headcount favors large states; this ranking surfaces denser markets.

Over-indexed vs national rate

District of Columbia 3.5× · 49/100k
Vermont 2.8× · 39.7/100k
Puerto Rico 2.6× · 36.1/100k
Massachusetts 2.3× · 32.6/100k
Minnesota 2.1× · 28.9/100k

Under-indexed vs national rate

Alabama 0.28× · 4/100k
Mississippi 0.30× · 4.3/100k
Louisiana 0.31× · 4.3/100k
South Carolina 0.37× · 5.2/100k
Oklahoma 0.43× · 6/100k

Which states have the most providers?

#	State	Providers	% of specialty
1	California	7,050	14.8%
2	New York	5,002	10.5%
3	Pennsylvania	2,644	5.6%
4	Michigan	2,518	5.3%
5	Massachusetts	2,281	4.8%
6	Florida	2,142	4.5%
7	Texas	2,083	4.4%
8	Minnesota	1,661	3.5%
9	North Carolina	1,510	3.2%
10	New Jersey	1,472	3.1%
11	Ohio	1,439	3.0%
12	Puerto Rico	1,156	2.4%
13	Maryland	1,145	2.4%
14	Illinois	1,072	2.3%
15	Colorado	1,011	2.1%

Top Cities for Psychologist

#	City	Providers
1	New YorkNew York	1,692
2	Los AngelesCalifornia	650
3	San FranciscoCalifornia	493
4	PhiladelphiaPennsylvania	423
5	BostonMassachusetts	422
6	BrooklynNew York	422
7	San DiegoCalifornia	394
8	ChicagoIllinois	361
9	HoustonTexas	349
10	MinneapolisMinnesota	342
11	WashingtonDistrict of Columbia	331
12	SeattleWashington	304

Sample Psychologist NPIs

A directory sample from this NUCC code (not a ranking). Names and locations are unique to this taxonomy.

#	Provider	State
1	William Dove, PH.D.Colorado Springs, CO	Colorado
2	Jason BootheAustin, TX	Texas
3	Claudia Byrne, PH.D.Beaverton, OR	Oregon
4	Robert Kammen, PSY.D.Kingston, PA	Pennsylvania
5	Seth Rubin, PH.D.San Francisco, CA	California
6	Gerald Jensen, MA, LPBrainerd, MN	Minnesota
7	William Keilin, PH.D.Austin, TX	Texas
8	Susie Troxler, PH.D.Greensboro, NC	North Carolina
9	Sarton Weinraub, PH.D.New York, NY	New York
10	Susan Griffith, PH.D.Hillsborough, NC	North Carolina
11	Allan Gelber, PH.DPhoenix, AZ	Arizona
12	Linda Waters, PH.D.Sherman Oaks, CA	California
13	Thomas Pollack, PH.D.Frederick, MD	Maryland
14	Diane Robbins, PHDHuntington Beach, CA	California
15	Donna Steckal, PH.D.Payson, AZ	Arizona
16	Susan Swann, PH.D.Flagstaff, AZ	Arizona
17	Mary Kay August, PH.D.Portland, OR	Oregon
18	Daniel Cohen, PHDBronx, NY	New York

Adjacent specialties in the NUCC Health Care Provider Taxonomy.

Clinical Psychologist

63,000 providers

School Psychologist

13,625 providers

Counseling Psychologist

7,912 providers

Clinical Child & Adolescent Psychologist

4,619 providers

Cognitive & Behavioral Psychologist

2,680 providers

Compare Psychologist vs Clinical Psychologist →

Explore

All Specialties → Compare Specialties → Rankings →

Frequently Asked Questions

How many Psychologist providers are in the US?

There are 47,555 Psychologist providers registered in the CMS NPPES database across 56 US states and territories. California has the most with 7,050 providers. Leading metros include New York, NY; Los Angeles, CA; San Francisco, CA; Philadelphia, PA. Among 690 NUCC specialties, this code ranks 39th by headcount.

Do Psychologist clinicians appear in Open Payments?

CMS Open Payments 2024 lists 36 Psychologist physicians receiving industry payments totaling $67K (750 payments; average $2K per paid physician, 201st of 552 specialties by average). Presence in Open Payments is not a quality judgment.

How much Part D prescribing does this specialty do?

Among Psychologist NPIs, 105 appear in the Medicare Part D Prescriber PUF (average 760 claims and $95K drug cost per prescriber; 204th of 567 specialties by average claims). Non-prescribing clinicians in the same NUCC code are still in NPPES.

Data sources and methodology

Provider data from CMS NPPES (download.cms.gov/nppes). Specialty classification from NUCC Health Care Provider Taxonomy (nucc.org). Part D averages from the CMS Medicare Part D Prescriber PUF; industry payments from CMS Open Payments 2024. Counts reflect self-designated primary taxonomy at NPI enrollment. PlainDoctor does not rate or rank providers. Methodology · About

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-05-20.