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

Margaret M. Koehm, MD

Individual provider Family Medicine Physician · NPI 1255315545

Margaret M. Koehm, MD is a Family Practice in Nantucket, Massachusetts. Qualified in 1995, 31 years ago. Practices with Nantucket Cottage Hospital, a 92-clinician group and accepts Medicare assignment. Licensed in Massachusetts and Rhode Island.

Years since qualifying
31
Licensed in
MA, RI
In the registry since
2005
Specialties on file
2
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

57 Prospect St
Nantucket, MA 02554-2799
Phone: (508) 325-9981
Fax: (508) 325-8558
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 213100 (MA)
Family Medicine Physician Taxonomy 207Q00000X · Licence MD213100 (RI)

Record details

NPI number1255315545
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 1, 2005
Last updated in NPPESJanuary 16, 2018

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolOTHER
Graduated 1995 (31 years in practice)
Group practice Nantucket Cottage Hospital — 92 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Nantucket