Gary Walco, PHD
NPI 1821040700 · Health Service Psychologist · Seattle, WA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gary Walco, PHD is a Health Service Psychologist provider in Seattle, WA (NPI 1821040700).
Provider details
- NPI number
- 1821040700
- Entity type
- Individual
- Primary specialty
- Health Service PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- PY 60066173 (WA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
20 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
- 2006-05-17
- Last updated
- 2018-07-17
Frequently asked questions
- What is Gary Walco's NPI number?
- Gary Walco's National Provider Identifier (NPI) is 1821040700, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Walco's specialty?
- Gary Walco is listed in the NPPES registry with a primary specialty of Health Service Psychologist (Behavioral Health & Social Service Providers).
- Where is Gary Walco located?
- Gary Walco's practice location on file with NPPES is 4800 Sand Point Way Ne, Seattle, WA 98105.
- What is Gary Walco's phone number?
- The practice phone number listed in the NPPES registry for Gary Walco is (206) 987-2704.
- Does Gary Walco accept Medicare?
- Gary Walco is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gary Walco's NPI active?
- Yes — Gary Walco's NPI (1821040700) is active in the NPPES registry as of the last update on 2018-07-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.