Hiroki Mitsuyama, MD
NPI 1164488086 · Radiation Oncology Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Hiroki Mitsuyama, MD is a Radiation Oncology Physician provider in Seattle, WA (NPI 1164488086).
Provider details
- NPI number
- 1164488086
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 35386 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,091 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Ct Guidance for Insertion of Radiation Therapy Fields77014 | 455 | $48 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 120 | $203 |
| Calculation of Radiation Therapy Dose77300 | 103 | $33 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 92 | $17 |
| Design and Construction of Complex Radiation Treatment Device77334 | 58 | $65 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Tamsulosin Hcl | 15 |
| Pentoxifylline | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-21
- Last updated
- 2013-04-23
Frequently asked questions
- What is Hiroki Mitsuyama's NPI number?
- Hiroki Mitsuyama's National Provider Identifier (NPI) is 1164488086, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Hiroki Mitsuyama's specialty?
- Hiroki Mitsuyama is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Hiroki Mitsuyama located?
- Hiroki Mitsuyama's practice location on file with NPPES is 1100 9th Ave, Seattle, WA 98101-2756.
- What is Hiroki Mitsuyama's phone number?
- The practice phone number listed in the NPPES registry for Hiroki Mitsuyama is (206) 223-6801.
- Does Hiroki Mitsuyama accept Medicare?
- Hiroki Mitsuyama is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Hiroki Mitsuyama's NPI active?
- Yes — Hiroki Mitsuyama's NPI (1164488086) is active in the NPPES registry as of the last update on 2013-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.