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

Ruby Ann Marr, MD

Individual provider Internal Medicine Physician · NPI 1952644700

Ruby Ann Marr, MD is an Internal Medicine in Ann Arbor, Michigan. Graduated from Wayne State University School of Medicine in 2013, 13 years ago. Practices with Regents of the University of Michigan, a 3,271-clinician group and accepts Medicare assignment. Licensed in Michigan.

Years since qualifying
13
Trained at
Wayne State University School of Medicine
Licensed in
MI
In the registry since
2013
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1500 E Medical Center Drive 3rd Fl Taubman Ctr Recp B
Ann Arbor, MI 48109-5352
Phone: (734) 936-5582
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 4301103598 (MI)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X
Internal Medicine Physician Taxonomy 207R00000X · Licence 5601007173 (MI)
Hospitalist Physician Taxonomy 208M00000X · Licence 4301103598 (MI)

Record details

NPI number1952644700
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 30, 2013
Last updated in NPPESJuly 21, 2022
Mailing address3621 S State St, 700 Kms Place, Ann Arbor, MI 48108

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolWAYNE STATE UNIVERSITY SCHOOL OF MEDICINE
Graduated 2013 (13 years in practice)
Group practice Regents Of The University Of Michigan — 3271 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations13 on file with Medicare

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