What is Mark Thomas's NPI number?

Mark Thomas's National Provider Identifier (NPI) is 1891595005, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mark Thomas's specialty?

Mark Thomas is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).

Where is Mark Thomas located?

Mark Thomas's practice location on file with NPPES is 750 Washington Rd Ste 19, Pittsburgh, PA 15228-2052.

What is Mark Thomas's phone number?

The practice phone number listed in the NPPES registry for Mark Thomas is (412) 298-2103.

Is Mark Thomas's NPI active?

Yes — Mark Thomas's NPI (1891595005) is active in the NPPES registry as of the last update on 2025-11-12.

IndividualActive

Mark Thomas, PHD

NPI 1891595005 · Clinical Psychologist · Pittsburgh, PA

Mark Thomas, PHD is a Clinical Psychologist provider in Pittsburgh, PA (NPI 1891595005).

Provider details

NPI number: 1891595005
Entity type: Individual
Primary specialty: Clinical PsychologistBehavioral Health & Social Service Providers
Credential: PHD
Sex: Male
Sole proprietor: Yes
License: PS020420 (PA)

Specialties & taxonomies

Clinical PsychologistPrimary103TC0700XLicense PS020420 (PA)
Behavioral Health & Social Service Providers

Profile Score

Established profile(55/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
1 yr in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Practice location

750 Washington Rd Ste 19

Pittsburgh, PA 15228-2052

Phone: (412) 298-2103

Street-level locationGet directions

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Mailing address