Matthew Clark
NPI 1689556201 · Psychiatric/Mental Health Nurse Practitioner · Olympia, WA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Clark is a Psychiatric/Mental Health Nurse Practitioner provider in Olympia, WA (NPI 1689556201).
Provider details
- NPI number
- 1689556201
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sole proprietor
- No
- License
- AP61636762 (WA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
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
Mailing address
Registry dates
- Enumerated
- 2025-07-24
- Last updated
- 2025-08-05
- Certified
- 2025-08-05
Frequently asked questions
- What is Matthew Clark's NPI number?
- Matthew Clark's National Provider Identifier (NPI) is 1689556201, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Clark's specialty?
- Matthew Clark is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Matthew Clark located?
- Matthew Clark's practice location on file with NPPES is Po Box 257, Olympia, WA 98507-0257.
- What is Matthew Clark's phone number?
- The practice phone number listed in the NPPES registry for Matthew Clark is (206) 208-8957.
- Does Matthew Clark accept Medicare?
- Matthew Clark is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Clark's NPI active?
- Yes — Matthew Clark's NPI (1689556201) is active in the NPPES registry as of the last update on 2025-08-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.