Nancy Marthakis, DO
NPI 1780946236 · Internal Medicine Physician · Grand Rapids, MI
Nancy Marthakis, DO is a Internal Medicine Physician provider in Grand Rapids, MI (NPI 1780946236).
Provider details
- NPI number
- 1780946236
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 02004027A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-06-11
- Last updated
- 2022-07-21
Frequently asked questions
- What is Nancy Marthakis's NPI number?
- Nancy Marthakis's National Provider Identifier (NPI) is 1780946236, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Marthakis's specialty?
- Nancy Marthakis is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Marthakis located?
- Nancy Marthakis's practice location on file with NPPES is 3355 Eagle Park Dr Ne Ste 103, Grand Rapids, MI 49525-7004.
- What is Nancy Marthakis's phone number?
- The practice phone number listed in the NPPES registry for Nancy Marthakis is (616) 942-7400.
- Is Nancy Marthakis's NPI active?
- Yes — Nancy Marthakis's NPI (1780946236) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.