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

Nancy Marthakis, DO

Individual provider Internal Medicine Physician · NPI 1780946236

Nancy Marthakis, DO is an Internal Medicine Physician in Grand Rapids, Michigan. Licensed in Indiana and Michigan. Registered with an NPI since 2012.

Licensed in
IN, MI
In the registry since
2012
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

3355 Eagle Park Dr NE Ste 103
Grand Rapids, MI 49525-7004
Phone: (616) 942-7400
Fax: (616) 942-7405
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 5101020834 (MI)
Internal Medicine Physician Taxonomy 207R00000X · Licence 02004027A (IN)

Record details

NPI number1780946236
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 11, 2012
Last updated in NPPESJuly 21, 2022

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