Gretchen Holtz, MSW, LICSW
NPI 1629402615 · Clinical Social Worker · Seattle, WA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gretchen Holtz, MSW, LICSW is a Clinical Social Worker provider in Seattle, WA (NPI 1629402615).
Provider details
- NPI number
- 1629402615
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- MSW, LICSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- LW61457871 (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
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 17520 Linden Ave N Apt B402Shoreline, WA 98133-4839Phone: (206) 841-4302
Registry dates
- Enumerated
- 2013-08-26
- Last updated
- 2024-07-31
- Certified
- 2024-07-31
Frequently asked questions
- What is Gretchen Holtz's NPI number?
- Gretchen Holtz's National Provider Identifier (NPI) is 1629402615, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gretchen Holtz's specialty?
- Gretchen Holtz is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Gretchen Holtz located?
- Gretchen Holtz's practice location on file with NPPES is 320 Ne 97th St, Seattle, WA 98115-2042.
- What is Gretchen Holtz's phone number?
- The practice phone number listed in the NPPES registry for Gretchen Holtz is (425) 640-7009.
- Does Gretchen Holtz accept Medicare?
- Gretchen Holtz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gretchen Holtz's NPI active?
- Yes — Gretchen Holtz's NPI (1629402615) is active in the NPPES registry as of the last update on 2024-07-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.