Sean Michael O'Neill, M.D., PH.D.
Surgery Physician · Chelsea, MI
Sean Michael O'Neill, M.D., PH.D. is a surgery physician with a practice address in Chelsea, Michigan, and NPI 1720421191, issued on Apr 16, 2013. Check the license (Michigan 4301505237, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Sean Michael O'Neill
- Credential
- M.D., PH.D.
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- 4301505237 MI
Self-reported in NPPES; status is on the state search - Practice location
- 14650 E Old US Highway 12, Chelsea, MI 48118
- Phone
- (734) 936-5738
- Enumerated
- Apr 16, 2013
- Record last updated
- Aug 29, 2022
- Fax
- (614) 293-4030
- Medicaid ID
- 0409738 OH
- Medicare enrollment
- Enrolled (PECOS I20220112000339); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 1,376 in Michigan → Look up another NPI →
Also registered at 14650 E Old US Highway 12
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Adam Agranoff, M.D.Physical Medicine & Rehabilitation Physician1053458117
- Rida Ali, PA-CPhysician Assistant1528861275
- Danielle Berthold, NPNurse Practitioner1144409905
- Mehar Brar, PA-CPhysician Assistant1255004511
- Ryan Carver, M.D.Physical Medicine & Rehabilitation Physician1710024872
- Jennifer Collin, MDObstetrics & Gynecology Physician1578656781
Verify Sean Michael O'Neill in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4301505237Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average surgery physician in 2024
16 Medicare Part D claims for 12 beneficiaries, against an average of 147 among the 20,115 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.
Industry payments in 2024: $87.28
1 payment: food and beverage; the largest payer was W. L. Gore & Associates, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 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
- Regents OF The University OF MichiganChelsea, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sean Michael O'Neill among 1,376 surgery physician records in Michigan
Sean Michael O'Neill, M.D., PH.D. is one of 1,376 surgery physician records with a practice address in Michigan. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 62% of them.
- NPI issued2013 · 62% of these records are older, 36% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated2013 · median 2006 among the 721 with a school on file
- Record last updated2022 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 surgery physician records list a practice address in Chelsea
They are 10 of the 500 NPPES records with a practice address in Chelsea, and 1,376 surgery physician records in Michigan.
All 1,376 in Michigan → Every provider in Chelsea → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- John Cooper, MDChelsea, MI 481181992746507
- Robert Cropsey, MDChelsea, MI 481181750482261
- David Diep, DOChelsea, MI 481181487815197
- Patrick Huck, MDChelsea, MI 481181821280223
- Jennifer Kulick, MDChelsea, MI 481181265511851
- Laura MazerChelsea, MI 481181710273560
- Nabeel Obeid, M.D.Chelsea, MI 481181568780849
- Alicia Snider, MDChelsea, MI 481181235426685
Common questions
What is Sean Michael O'Neill, M.D., PH.D.'s NPI number?
Sean Michael O'Neill, M.D., PH.D.'s National Provider Identifier (NPI) is 1720421191, issued on Apr 16, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Sean Michael O'Neill, M.D., PH.D. located?
The NPPES record lists a practice address at 14650 E Old US Highway 12, Chelsea, MI, 48118. Phone: (734) 936-5738. Providers update this record themselves, so call before visiting.
How can I verify Sean Michael O'Neill, M.D., PH.D.'s license?
NPPES lists Michigan license number 4301505237, 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 Sean Michael O'Neill, M.D., PH.D. prescribe under Medicare Part D?
In 2024, Sean Michael O'Neill, M.D., PH.D. had 16 Medicare Part D claims for 12 beneficiaries; the average among surgery physician prescribers was 147. 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.