DR. HIROKI MITSUYAMA (MD) – Radiation Oncology Physician, NPI 1164488086
Radiation Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
184 RADIATION ONCOLOGY in WA
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Provider Addresses for DR. HIROKI MITSUYAMA (MD)
Virginia Mason Hospital & Seattle Medical Center, 1100, 9th Avenue, Central Business District, First Hill, Seattle, King County, Washington, 98101, United States
MS:M4-PFS
SEATTLE, WA 981012756
Phone: (206) 515-5811
Mailing address matches the actual address.
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: 2010-12-08
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
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 |
|---|---|---|---|---|
| I20101208001300 | I | Radiation Oncology | 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 |
|---|---|---|---|---|
| 77014 | Ct guidance for insertion of radiation therapy fields | 557 | 53 | $0 |
| 77427 | Radiation treatment management, 5 treatment sessions | 153 | 50 | $0 |
| 77300 | Calculation of radiation therapy dose | 146 | 40 | $0 |
| 77334 | Design and construction of complex radiation treatment device | 103 | 27 | $0 |
| G6002 | Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy | 45 | 15 | $0 |
Insurance plans in this area (ZIP 98101)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine, Critical Care (Intensivists) | WA | |
| Gastroenterology, Internal Medicine | WA | |
| - | WA | |
| - | WA | |
| D E R M A T O L O G Y | WA | |
| - | WA | |
| Internal Medicine | WA | |
| - | WA | |
| Internal Medicine, Hematology/Oncology | WA | |
| - | WA |
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