Michael C. Okimura, MD
Endocrinology, Diabetes & Metabolism Physician · Roseville, CA
Michael C. Okimura, MD is an endocrinology, diabetes & metabolism physician with a practice address in Roseville, California, and NPI 1861570533, issued on Nov 1, 2006. Check the license (California G42439, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael C. Okimura
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- G42439 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1600 Eureka RD, Roseville, CA 95661
- Phone
- (916) 784-4004
- Enumerated
- Nov 1, 2006
- Record last updated
- Jun 3, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicaid ID
- 00G424390 CA
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
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Verify Michael C. Okimura in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G42439Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
18 Medicare Part D claims for 17 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D.
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.
Michael C. Okimura among 1,131 endocrinology, diabetes & metabolism physician records in California
Michael C. Okimura, MD is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 54% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2010 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Roseville → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Sallie Adams, M.D.Roseville, CA 956611255342085
- Aditi Bhaduri, M.D.Roseville, CA 956611114029329
- Richa Bhattarai, M.DRoseville, CA 956611407298458
- Matthew Connors, MDRoseville, CA 956611326112640
- Jose Lado-Abeal, MDRoseville, CA 956611699910562
- Jagmeet Mangat, MDRoseville, CA 956611306101829
- Jodi Nagelberg, M.D.Roseville, CA 956611720474141
- Cynthia Ro, M.D.Roseville, CA 956611598946790
Common questions
What is Michael C. Okimura, MD's NPI number?
Michael C. Okimura, MD's National Provider Identifier (NPI) is 1861570533, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael C. Okimura, MD located?
The NPPES record lists a practice address at 1600 Eureka RD, Roseville, CA, 95661. Phone: (916) 784-4004. Providers update this record themselves, so call before visiting.
How can I verify Michael C. Okimura, MD's license?
NPPES lists California license number G42439, 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 Michael C. Okimura, MD prescribe under Medicare Part D?
In 2024, Michael C. Okimura, MD had 18 Medicare Part D claims for 17 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.