What is William Clark's NPI number?

William Clark's National Provider Identifier (NPI) is 1629810171, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Clark's specialty?

William Clark is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).

Where is William Clark located?

William Clark's practice location on file with NPPES is 17518 Se River Rd, Portland, OR 97267-5635.

What is William Clark's phone number?

The practice phone number listed in the NPPES registry for William Clark is (971) 990-7628.

Is William Clark's NPI active?

Yes — William Clark's NPI (1629810171) is active in the NPPES registry as of the last update on 2025-08-20.

IndividualActive

William Clark, CRM, THW, CADC-R

NPI 1629810171 · Mental Health Counselor · Portland, OR

William Clark, CRM, THW, CADC-R is a Mental Health Counselor provider in Portland, OR (NPI 1629810171).

Provider details

NPI number: 1629810171
Entity type: Individual
Primary specialty: Mental Health CounselorBehavioral Health & Social Service Providers
Credential: CRM, THW, CADC-R
Sex: Male
Sole proprietor: No

Specialties & taxonomies

Mental Health CounselorPrimary101YM0800X
Behavioral Health & Social Service Providers

Profile Score

Established profile(50/100 index)

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

Registry tenure38% of score
2 yrs in NPPES registry
Profile completeness38% of score
83% 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

17518 Se River Rd

Portland, OR 97267-5635

Phone: (971) 990-7628

Street-level locationGet directions

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Mailing address