James A. Oconnor, D.O.
Adult Medicine Physician · Ann Arbor, MI
James A. Oconnor, D.O. is an adult medicine physician with a practice address in Ann Arbor, Michigan, and NPI 1659442184, issued on Nov 13, 2006. Check the license (Michigan 5101005756, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- James A. Oconnor
- Credential
- D.O.
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- 5101005756 MI
Self-reported in NPPES; status is on the state search - Practice location
- 315 E Eisenhower Pkwy, Ann Arbor, MI 48108
- Phone
- (734) 222-8200
- Enumerated
- Nov 13, 2006
- Record last updated
- Dec 17, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (734) 222-8202
- Medicaid ID
- 11-2905678 MI
- Entity
- Type 1 · individual
8 nearest adult medicine physician records → All 45 in Michigan → Look up another NPI →
Also registered at 315 E Eisenhower Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify James A. Oconnor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 5101005756Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average adult medicine physician in 2024
116 Medicare Part D claims for 19 beneficiaries, against an average of 3,002 among the 1,307 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.
James A. Oconnor among 45 adult medicine physician records in Michigan
James A. Oconnor, D.O. is one of 45 adult medicine physician records with a practice address in Michigan. 58% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 58% newer
- In a Medicare fileYes · 58% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2012 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0505X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Medicine Physician providers in Michigan
There are 45 adult medicine physician records in Michigan.
All 45 in Michigan → Every provider in Ann Arbor → Adult Medicine Physician nationwide →
The 8 adult medicine physician records with the nearest ZIP codes
- Leslie Arwin, MD, MPHAnn Arbor, MI 481051588750251
- Jaganmohanarao Kakarala, M.DAnn Arbor, MI 481051821383779
- David Szaraz, MDBelleville, MI 481111700085362
- Peter Stratton, M.D.Dearborn, MI 481261548539075
- Iqbal Nasir, MDSouthfield, MI 480761639261696
- Jean Pierre-Paul, MDSouthfield, MI 480751578522686
- Leila Lee, ANP-BCRoyal Oak, MI 480731609250133
- Colin Orrin, DOMadison Heights, MI 480711245852714
Common questions
What is James A. Oconnor, D.O.'s NPI number?
James A. Oconnor, D.O.'s National Provider Identifier (NPI) is 1659442184, issued on Nov 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James A. Oconnor, D.O. located?
The NPPES record lists a practice address at 315 E Eisenhower Pkwy, Ann Arbor, MI, 48108. Phone: (734) 222-8200. Providers update this record themselves, so call before visiting.
How can I verify James A. Oconnor, D.O.'s license?
NPPES lists Michigan license number 5101005756, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James A. Oconnor, D.O. prescribe under Medicare Part D?
In 2024, James A. Oconnor, D.O. had 116 Medicare Part D claims for 19 beneficiaries; the average among adult medicine physician prescribers was 3,002. 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.