Kenneth T. Shimizu, M.D.
Radiation Oncology Physician · San Diego, CA
Kenneth T. Shimizu, M.D. is a radiation oncology physician with a practice address in San Diego, California, and NPI 1326032129, issued on Sep 7, 2005. Check the license (California G67647, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kenneth T. Shimizu
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- G67647 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10670 John J Hopkins Dr, San Diego, CA 92121
- Phone
- (858) 554-4100
- Enumerated
- Sep 7, 2005
- Record last updated
- Oct 26, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicaid ID
- 00G67647O CA
- Medicare enrollment
- Enrolled (PECOS I20050211000864); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1988
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Also registered at 10670 John J Hopkins Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stacey BrownOccupational Therapist1447906763
- Alison Meagher, MS, RDRegistered Dietitian1952904021
- Farah Shakoori, REGISTERED DIETITIANRegistered Dietitian1770094294
- Jessica Spiewak, MS, PHDGenetic Counselor (M.S.)1053973362
- Ryan Takatani, P.A.Surgical Physician Assistant1518107556
- Prabhakar Tripuraneni, M.D.Radiation Oncology Physician1558312868
Verify Kenneth T. Shimizu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G67647Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average radiation oncology physician in 2024
70 Medicare Part D claims for 33 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 11 claims were for opioids.
Most prescribed
- Hydrocortisone18 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $24.19
1 payment: food and beverage; the largest payer was Progenics Pharmaceuticals, Inc. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Scripps HealthLa Jolla, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kenneth T. Shimizu among 735 radiation oncology physician records in California
Kenneth T. Shimizu, M.D. is one of 735 radiation oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1988 · median 2005 among the 545 with a school on file
- Record last updated2017 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in California
There are 735 radiation oncology physician records in California.
All 735 in California → Every provider in San Diego → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Andrew Chang, M.D.San Diego, CA 921211255513859
- Jehee Choi, MDSan Diego, CA 921211619260056
- Brian Chou, MDSan Diego, CA 921211770070609
- Iain Macewan, M.D.San Diego, CA 921211326300401
- Atmaram Pai Panandiker, MDSan Diego, CA 921211871552950
- Bradley Prestidge, MDSan Diego, CA 921211134126220
- Carl Rossi, M.D.San Diego, CA 921211518983055
- Prabhakar Tripuraneni, M.D.San Diego, CA 921211558312868
Common questions
What is Kenneth T. Shimizu, M.D.'s NPI number?
Kenneth T. Shimizu, M.D.'s National Provider Identifier (NPI) is 1326032129, issued on Sep 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Kenneth T. Shimizu, M.D. located?
The NPPES record lists a practice address at 10670 John J Hopkins Dr, San Diego, CA, 92121. Phone: (858) 554-4100. Providers update this record themselves, so call before visiting.
How can I verify Kenneth T. Shimizu, M.D.'s license?
NPPES lists California license number G67647, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kenneth T. Shimizu, M.D. prescribe under Medicare Part D?
In 2024, Kenneth T. Shimizu, M.D. had 70 Medicare Part D claims for 33 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.