John Maclin Barnwell, M.D.
Surgical Oncology Physician · Detroit, MI
John Maclin Barnwell, M.D. is a surgical oncology physician with a practice address in Detroit, Michigan, and NPI 1831105550, issued on Aug 1, 2006. Check the license (Michigan JB071944, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- John Maclin Barnwell
- Credential
- M.D.
- Primary taxonomy
- Surgical Oncology Physician 2086X0206X
- License number
- JB071944 MI
Self-reported in NPPES; status is on the state search - Practice location
- 18709 Meyers RD., Detroit, MI 48235
- Phone
- (313) 864-8456
- Enumerated
- Aug 1, 2006
- Record last updated
- Sep 9, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (313) 864-0079
- Medicaid ID
- 3500585 MI
- Medicare enrollment
- Enrolled (PECOS I20060823000209); accepts Medicare assignment
- Medical or professional school
- Howard University College Of Medicine, 1989
- Entity
- Type 1 · individual
8 nearest surgical oncology physician records → All 33 in Michigan → Look up another NPI →
Verify John Maclin Barnwell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license JB071944Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average surgical oncology physician in 2024
32 Medicare Part D claims for 25 beneficiaries, against an average of 87 among the 1,237 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: $312.13
5 payments; by number, the most common kind was food and beverage; the largest payer was Integra LifeSciences Corporation. The 1,132 providers of this specialty with any payment received $4,224.74 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
- United Trauma Care PLCDetroit, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Maclin Barnwell among 33 surgical oncology physician records in Michigan
John Maclin Barnwell, M.D. is one of 33 surgical oncology physician records with a practice address in Michigan. 91% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 70% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 85% of these records are
- Graduated1989 · median 2007 among the 28 with a school on file
- Record last updated2014 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2086X0206X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Oncology Physician providers in Michigan
There are 33 surgical oncology physician records in Michigan.
All 33 in Michigan → Every provider in Detroit → Surgical Oncology Physician nationwide →
The 8 surgical oncology physician records with the nearest ZIP codes
- Sarwat Ahmad, MDGrosse Pointe, MI 482301639464829
- Lindsay Petersen, M.D.Detroit, MI 482021154641280
- Rupen Shah, M.D.Detroit, MI 482021679705339
- Paige Aiello, MDDetroit, MI 482011467016642
- Steve Kim, M.D. FACSDetroit, MI 482011356441646
- Tara Breslin, MDYpsilanti, MI 481971922062538
- Christina Angeles, MDAnn Arbor, MI 481091174780712
- Filip Bednar, MDAnn Arbor, MI 481091588865752
Common questions
What is John Maclin Barnwell, M.D.'s NPI number?
John Maclin Barnwell, M.D.'s National Provider Identifier (NPI) is 1831105550, issued on Aug 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Maclin Barnwell, M.D. located?
The NPPES record lists a practice address at 18709 Meyers RD., Detroit, MI, 48235. Phone: (313) 864-8456. Providers update this record themselves, so call before visiting.
How can I verify John Maclin Barnwell, M.D.'s license?
NPPES lists Michigan license number JB071944, 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 Maclin Barnwell, M.D. prescribe under Medicare Part D?
In 2024, John Maclin Barnwell, M.D. had 32 Medicare Part D claims for 25 beneficiaries; the average among surgical oncology physician prescribers was 87. 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.