Quick answers
- Does Kenneth T. Shimizu accept Medicare assignment?
- Yes. Medicare's clinician data says Kenneth T. Shimizu accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Kenneth T. Shimizu see?
- In 2024, CMS data shows 367 Original Medicare patients and 2,263 services for Kenneth T. Shimizu. This counts Original Medicare only and measures volume, not quality.
- What is Kenneth T. Shimizu's NPI number?
- 1326032129. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Kenneth T. Shimizu, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 367 |
|---|---|
| Services billed to Medicare | 2,263 |
| Different services or procedures | 37 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Design and construction of complex radiation treatment device (77334)309 services
- Radiation treatment management, 5 treatment sessions (77427)259 services
- Calculation of radiation therapy dose (77300)236 services
- Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy (G6002)201 services
- Ct guidance for insertion of radiation therapy fields (77014)166 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
- High cholesterol72%
- High blood pressure65%
- Arthritis43%
- Ischemic heart disease24%
- Osteoporosis24%
Hospitals where Kenneth T. Shimizu works
Medicare's Facility Affiliation Data lists Kenneth T. Shimizu at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Scripps Green HospitalLa Jolla, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 050424
- Scripps Memorial Hospital - EncinitasEncinitas, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050503
- Scripps Memorial Hospital La JollaLa Jolla, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050324
Practice locations
Addresses where Kenneth T. Shimizu is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 10670 John Jay Hopkins DrSan Diego, CA 92121 (858) 554‑4100
- 10670 John Jay Hopkins Dr, Scripps Green HospitalLa Jolla, CA 92121 (858) 554‑4100
- 4020 5th Ave, Suite 401San Diego, CA 92103 (619) 849‑4469
- 9888 Genesee AveLa Jolla, CA 92037 (858) 626‑4123
- 9896 Genesee AveLa Jolla, CA 92037 (858) 626‑4123
Group practices
Medicare enrollment lists Kenneth T. Shimizu as a member of this group (CMS data updated October 2, 2026).
- Scripps Health1,433 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in San Diego
Clinicians with the same Medicare primary specialty in San Diego, CA — not a recommendation.
Other clinicians in Scripps Health
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1326032129 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians