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

Mary Margaret Johnson, MD

Individual provider Internal Medicine Physician · NPI 1053400291

Mary Margaret Johnson, MD is a Hospitalist in Marshall, Michigan. Graduated from University of Michigan Medical School in 1984, 42 years ago. Practices with Apogee Medical Group Michigan PC, a 44-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
42
Trained at
University of Michigan Medical School
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

200 N Madison St
Marshall, MI 49068-1143
Phone: (269) 781-4271
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 4301050976 (MI)

Record details

NPI number1053400291
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 12, 2006
Last updated in NPPESDecember 12, 2014

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Graduated 1984 (42 years in practice)
Group practice Apogee Medical Group Michigan Pc — 44 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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