Griffin Dufek
NPI 1477446235 · Internal Medicine Physician · Grand Blanc, MI
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Griffin Dufek is a Internal Medicine Physician provider in Grand Blanc, MI (NPI 1477446235).
Provider details
- NPI number
- 1477446235
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 5151017544 (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
1 yr 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
- 2025-05-31
- Last updated
- 2025-05-31
- Certified
- 2025-05-30
Frequently asked questions
- What is Griffin Dufek's NPI number?
- Griffin Dufek's National Provider Identifier (NPI) is 1477446235, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Griffin Dufek's specialty?
- Griffin Dufek is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Griffin Dufek located?
- Griffin Dufek's practice location on file with NPPES is 1 Genesys Pkwy, Grand Blanc, MI 48439-8065.
- What is Griffin Dufek's phone number?
- The practice phone number listed in the NPPES registry for Griffin Dufek is (810) 606-5000.
- Does Griffin Dufek accept Medicare?
- Griffin Dufek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Griffin Dufek's NPI active?
- Yes — Griffin Dufek's NPI (1477446235) is active in the NPPES registry as of the last update on 2025-05-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.