Mark Summerson, PH.D.
NPI 1932122934 · Psychologist · Pullman, WA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Summerson, PH.D. is a Psychologist provider in Pullman, WA (NPI 1932122934).
Provider details
- NPI number
- 1932122934
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- WA2258 (WA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs 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
Mailing address
Registry dates
- Enumerated
- 2006-07-25
- Last updated
- 2016-04-06
Frequently asked questions
- What is Mark Summerson's NPI number?
- Mark Summerson's National Provider Identifier (NPI) is 1932122934, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Summerson's specialty?
- Mark Summerson is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Mark Summerson located?
- Mark Summerson's practice location on file with NPPES is 254 E Main St, Pullman, WA 99163-2678.
- What is Mark Summerson's phone number?
- The practice phone number listed in the NPPES registry for Mark Summerson is (509) 330-5456.
- Does Mark Summerson accept Medicare?
- Mark Summerson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Summerson's NPI active?
- Yes — Mark Summerson's NPI (1932122934) is active in the NPPES registry as of the last update on 2016-04-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.