John Michael Sullivan, MD
Internal Medicine Physician · Grand Blanc, MI
John Michael Sullivan, MD is an internal medicine physician with a practice address in Grand Blanc, Michigan, and NPI 1447935614, issued on Jun 16, 2023. Check the license (Michigan 4351051439, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- John Michael Sullivan
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4351051439 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1 Genesys Pkwy, Grand Blanc, MI 48439
- Phone
- (810) 606-5000
- Enumerated
- Jun 16, 2023
- Record last updated
- Jun 16, 2023
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 5,735 in Michigan → Look up another NPI →
Also registered at 1 Genesys Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Michael Sullivan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4351051439Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
156 Medicare Part D claims for 33 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Losartan Potassium11 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: $14.73
1 payment: food and beverage; the largest payer was Biosense Webster, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
John Michael Sullivan among 5,735 internal medicine physician records in Michigan
John Michael Sullivan, MD is one of 5,735 internal medicine physician records with a practice address in Michigan. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 90% of them.
- NPI issued2023 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2023 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
100 internal medicine physician records list a practice address in Grand Blanc
They are 100 of the 1,735 NPPES records with a practice address in Grand Blanc, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Grand Blanc → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Badar Ahmed, M.D.Grand Blanc, MI 484391699768796
- Indira Alluru, MDGrand Blanc, MI 484391003918095
- Ann Burton, MDGrand Blanc, MI 484391528253689
- Osama Galal, M.D.Grand Blanc, MI 484391891735148
- Dianne Gregory, M.D.Grand Blanc, MI 484391497795462
- Jane Johnson, M.D.Grand Blanc, MI 484391427132877
- El Sheikh Eltayeb Kineish, M.D.Grand Blanc, MI 484391861405797
- Prasad Kommareddi, M.D.Grand Blanc, MI 484391669564498
Common questions
What is John Michael Sullivan, MD's NPI number?
John Michael Sullivan, MD's National Provider Identifier (NPI) is 1447935614, issued on Jun 16, 2023. An NPI identifies a provider in billing; it is not a license.
Where is John Michael Sullivan, MD located?
The NPPES record lists a practice address at 1 Genesys Pkwy, Grand Blanc, MI, 48439. Phone: (810) 606-5000. Providers update this record themselves, so call before visiting.
How can I verify John Michael Sullivan, MD's license?
NPPES lists Michigan license number 4351051439, 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 John Michael Sullivan, MD prescribe under Medicare Part D?
In 2024, John Michael Sullivan, MD had 156 Medicare Part D claims for 33 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.