James Masson, PH.D.
NPI 1134262884 · Clinical Psychologist · Olympia, WA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Masson, PH.D. is a Clinical Psychologist provider in Olympia, WA (NPI 1134262884).
Provider details
- NPI number
- 1134262884
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- PY00001701 (WA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
- 2007-02-14
- Last updated
- 2009-01-13
Frequently asked questions
- What is James Masson's NPI number?
- James Masson's National Provider Identifier (NPI) is 1134262884, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Masson's specialty?
- James Masson is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is James Masson located?
- James Masson's practice location on file with NPPES is 2118 Caton Way Sw, Olympia, WA 98502-1105.
- What is James Masson's phone number?
- The practice phone number listed in the NPPES registry for James Masson is (360) 754-4662.
- Does James Masson accept Medicare?
- James Masson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Masson's NPI active?
- Yes — James Masson's NPI (1134262884) is active in the NPPES registry as of the last update on 2009-01-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.