Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mr. John Maclin Barnwell Sr., MD

Individual provider Surgical Oncology Physician · NPI 1831105550

Mr. John Maclin Barnwell Sr., MD is a General Surgery in Detroit, Michigan. Graduated from Howard University College of Medicine in 1989, 37 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
37
Trained at
Howard University College of Medicine
Licensed in
MI
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

18709 Meyers Rd
Detroit, MI 48235
Phone: (313) 864-8456
Fax: (313) 864-0079
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Surgical Oncology Physician (primary) Taxonomy 2086X0206X · Licence JB071944 (MI)

Record details

NPI number1831105550
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 1, 2006
Last updated in NPPESSeptember 9, 2014

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGENERAL SURGERY
Medical schoolHOWARD UNIVERSITY COLLEGE OF MEDICINE
Graduated 1989 (37 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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