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GRETCHEN HOLTZ MSW, LICSW
NPI 1629402615
Social Worker - Clinical in Seattle, WA

Active since August 26, 2013PECOS Enrolled
320 NE 97TH ST, SEATTLE, WA 98115(425) 640-7009 Get Directions Write a Review

NPPES record last updated: July 31, 2024. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Jul 31, 2024, Nov 16, 2021 (2 updates tracked since 2021).

About Gretchen Holtz Msw, Licsw NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GRETCHEN HOLTZ MSW, LICSW (NPI 1629402615) is an individual clinical provider in Seattle, Washington, licensed in Washington (LW61457871) and active in the NPI registry since August 2013. She is enrolled in Medicare PECOS and maintains a secondary practice location in Shoreline.

NPPES Registry Identity

NPI1629402615
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameGRETCHEN HOLTZCredential: MSW, LICSW
Location Address320 NE 97TH STSeattle, WA 98115-2042
Mailing Address748 Market St # 131Tacoma, WA 98402-3737 · (425) 640-7009
Phone(425) 640-7009
Sole ProprietorYes
Enumeration DateAugust 26, 2013
Last NPPES UpdateJuly 31, 20242 updates tracked since enumeration
NPPES CertifiedJuly 31, 2024
✔ NPI 1629402615 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in WA · LW61457871
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
320 NE 97TH ST, Seattle, WA 98115
Open in Google Maps ↗

Secondary Practice Location 1

Location 117520 Linden Ave N Apt B402Shoreline, WA 98133-4839 · Phone (206) 841-4302

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gretchen Holtz Msw, Licsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Gretchen Holtz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Mindful Therapy Group PC
7.2 mi
Clinical
6505 216TH ST SW STE 100
Mountlake Terrace, WA 98043
  • Reassigned Medicare billing, Washington enrollment
  • 777 clinicians in this Medicare group
NPI 1316238678 (425) 640-7009

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98115 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$0.00 typical visit price
range $63.67 – $189.37
Typical copayment $0.00 (range $15.91 – $47.34)
Most-billed visit code NA
Established Patient
$78.74 typical visit price
range $21.12 – $155.00
Typical copayment $19.68 (range $5.28 – $38.75)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. MARION MARGARET PAETZNICK PT, DPT
Physical Therapist
320 NE 97TH ST
SEATTLE, WA 98115
King County (206) 525-1010
DR. THOMAS CARNS DDS
Dentist (General Practice)
320 NE 97TH ST, SUITE D
SEATTLE, WA 98115
King County (206) 524-9550
THERESE LAW MD
Internal Medicine
320 NE 97TH ST, SUITE A
SEATTLE, WA 98115
King County (206) 323-8113
LABORATORY CORPORATION OF AMERICA
Clinical Medical Laboratory
320 NE 97TH ST, STE A
SEATTLE, WA 98115
King County (206) 322-1411
DR. SHADI GHAFFARIAN SHIRAZI PSY.D.
Counselor
320 NE 97TH ST
SEATTLE, WA 98115
King County (206) 397-0041

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gretchen Holtz's NPI number?

The NPI number for Gretchen Holtz is 1629402615. It was assigned to this individual provider in the NPPES registry on August 26, 2013.

Where is Gretchen Holtz located?

Gretchen Holtz practices at 320 NE 97th St, Seattle, WA 98115. The listed phone number is (425) 640-7009.

What is Gretchen Holtz's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Gretchen Holtz enrolled in Medicare?

Yes. Gretchen Holtz is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Gretchen Holtz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gretchen Holtz reassigns Medicare benefits to Mindful Therapy Group PC (Mountlake Terrace, WA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gretchen Holtz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gretchen Holtz accept?

Health plans from Premera Blue Cross Blue Shield of Alaska list Gretchen Holtz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Gretchen Holtz was last updated on July 31, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.