Michael Oconnor, MD
Endocrinology, Diabetes & Metabolism Physician · Pinole, CA
Michael Oconnor, MD is an endocrinology, diabetes & metabolism physician with a practice address in Pinole, California, and NPI 1386753317, issued on Aug 30, 2006. Check the license (California 00A446530, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Oconnor
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 00A446530 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1690 San Pablo Ave, Pinole, CA 94564
- Phone
- (925) 753-1986
- Enumerated
- Aug 30, 2006
- Record last updated
- Aug 30, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080425000633); may accept Medicare assignment
- Medical or professional school
- Harvard Medical School, 1984
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 1690 San Pablo Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Patricia Oconnor, M.D.Family Medicine Physician1720006380
- Arjay Ventura, D.C.Chiropractor1194053959
Verify Michael Oconnor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 00A446530Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
2,888 Medicare Part D claims for 327 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims. 76 claims were for opioids.
Most prescribed
- Levothyroxine Sodium288 claims
- Metformin Hcl195 claims
- Ozempic129 claims
- Atorvastatin Calcium116 claims
- Lantus Solostar98 claims
- Amlodipine Besylate88 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.
Bills Medicare through one group practice
- Oconnor Physician Group IncPinole, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Oconnor among 1,131 endocrinology, diabetes & metabolism physician records in California
Michael Oconnor, 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 fileYes · 69% of these records are
- Graduated1984 · median 2003 among the 779 with a school on file
- Record last updated2016 · 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 Pinole → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Randall Ammon, M.D.Orinda, CA 945631306933783
- Rachelle Halpern, MDOrinda, CA 945631811073133
- Todd Lorenz, MDOrinda, CA 945631881172864
- Pragnesh Patel, MDPittsburg, CA 945651053488866
- Deval Bhatt, M.D.Dublin, CA 945681326385659
- Sai Bhuvanagiri, M.D.Dublin, CA 945681134652266
- Aruna Chakravorty, M.D., PHDDublin, CA 945681871558288
- Hoda Ghanem, M.D.Dublin, CA 945681114131166
Common questions
What is Michael Oconnor, MD's NPI number?
Michael Oconnor, MD's National Provider Identifier (NPI) is 1386753317, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael Oconnor, MD located?
The NPPES record lists a practice address at 1690 San Pablo Ave, Pinole, CA, 94564. Phone: (925) 753-1986. Providers update this record themselves, so call before visiting.
How can I verify Michael Oconnor, MD's license?
NPPES lists California license number 00A446530, 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 Oconnor, MD prescribe under Medicare Part D?
In 2024, Michael Oconnor, MD had 2,888 Medicare Part D claims for 327 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.