MR. ZACHARY WALKER (MD) – Diagnostic Radiology Physician, NPI 1164955571
Diagnostic Radiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
4,793 DIAGNOSTIC RADIOLOGY in CA
Provider Addresses for MR. ZACHARY WALKER (MD)
505 PARNASSUS AVE
SAN FRANCISCO, CA 941432204
Phone: (415) 353-1821
Fax: (415) 476-0616
Type: Location
1304 Fawcett Ave Ste 100
Tacoma, WA 984021900
Phone: (253) 761-4200
Type: Location
Central Pavilion, 925, Seneca Street, Central Business District, First Hill, Seattle, King County, Washington, 98101, United States
MAILSTOP: H8-GME
SEATTLE, WA 981012742
Phone: (206) 583-6079
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2023-09-07
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20220809003497 | I | Diagnostic Radiology | CA | TBD |
| I20230907004098 | I | Diagnostic Radiology | WA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 74177 | Ct scan of abdomen and pelvis with contrast | 80 | 79 | $0 |
| 71250 | Ct scan of chest without contrast | 66 | 66 | $0 |
| 71045 | X-ray of chest, 1 view | 42 | 41 | $0 |
| 71275 | Ct scan of blood vessels of chest with contrast | 34 | 34 | $0 |
| 71260 | Ct scan of chest with contrast | 31 | 31 | $0 |
Insurance plans in this area (ZIP 94143)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Diagnostic Radiology | MI | |
| Diagnostic Radiology | WA | |
| Diagnostic Radiology | WA | |
| Diagnostic Radiology | WA | |
| Diagnostic Radiology | WA | |
| Diagnostic Radiology | WA | |
| Diagnostic Radiology | OH | |
| Diagnostic Radiology | WA | |
| Diagnostic Radiology | WA | |
| - | WA |
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