Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Adam Douglas Marks, MD

Individual provider Internal Medicine Physician · NPI 1265639025

Adam Douglas Marks, MD is registered under Hospice/Palliative Care in Ann Arbor, Michigan. Graduated from University of Wisconsin School of Medicine in 2007, 19 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
19
Trained at
University of Wisconsin School of Medicine
Licensed in
MI
In the registry since
2007
Specialties on file
5
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

4260 Plymouth Rd
Ann Arbor, MI 48109-2700
Phone: (734) 764-6831
Show map & directions

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

Specialties & licences

Hospice and Palliative Medicine (Internal Medicine) Physician (primary) Taxonomy 207RH0002X · Licence 4301090107 (MI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 4301090107 (MI)
Geriatric Medicine (Internal Medicine) Physician Taxonomy 207RG0300X · Licence 4301090107 (MI)
Pediatrics Physician Taxonomy 208000000X · Licence 4301090107 (MI)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence 4301090107 (MI)

Record details

NPI number1265639025
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 27, 2007
Last updated in NPPESJune 9, 2025
Certification dateJune 9, 2025

Medicare enrollment

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

Medicare specialtyHOSPICE/PALLIATIVE CARE
Also practisesGERIATRIC MEDICINE, INTERNAL MEDICINE, PEDIATRIC MEDICINE
Medical schoolUNIVERSITY OF WISCONSIN SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice Regents Of The University Of Michigan — 3271 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations8 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients37
Services billed 91 a service is one billed item, such as a visit, a test or a procedure
Average patient age66

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Regents of the University of Michigan

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3271 clinicians in the practice; 12 are shown here.

Other providers in Ann Arbor