Grant Clunas, DO
NPI 1255017596 · Internal Medicine Physician · Pontiac, MI
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grant Clunas, DO is a Internal Medicine Physician provider in Pontiac, MI (NPI 1255017596).
Provider details
- NPI number
- 1255017596
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 5151016111 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 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
- 2023-06-22
- Last updated
- 2023-06-22
- Certified
- 2023-06-22
Frequently asked questions
- What is Grant Clunas's NPI number?
- Grant Clunas's National Provider Identifier (NPI) is 1255017596, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grant Clunas's specialty?
- Grant Clunas is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Grant Clunas located?
- Grant Clunas's practice location on file with NPPES is 50 N Perry St, Pontiac, MI 48342-2217.
- What is Grant Clunas's phone number?
- The practice phone number listed in the NPPES registry for Grant Clunas is (248) 338-5392.
- Does Grant Clunas accept Medicare?
- Grant Clunas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grant Clunas's NPI active?
- Yes — Grant Clunas's NPI (1255017596) is active in the NPPES registry as of the last update on 2023-06-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.