Gregory Hessler, M D
NPI 1326156928 · Family Medicine Physician · Mackinac Island, MI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Hessler, M D is a Family Medicine Physician provider in Mackinac Island, MI (NPI 1326156928).
Provider details
- NPI number
- 1326156928
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M D
- Sex
- Male
- Sole proprietor
- No
- License
- 4301048874 (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
19 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 35 | 12 |
| Lisinopril | 28 | — |
| Atorvastatin Calcium | 28 | — |
| Metformin Hcl | 27 | — |
| Progesterone, Micronizedbrand: Progesterone | 25 | — |
| Thyroid,porkbrand: Armour Thyroid | 21 | — |
| Albuterol Sulfate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-25
- Last updated
- 2022-07-21
Frequently asked questions
- What is Gregory Hessler's NPI number?
- Gregory Hessler's National Provider Identifier (NPI) is 1326156928, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Hessler's specialty?
- Gregory Hessler is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Hessler located?
- Gregory Hessler's practice location on file with NPPES is 7474 Market Street, Mackinac Island, MI 49757.
- What is Gregory Hessler's phone number?
- The practice phone number listed in the NPPES registry for Gregory Hessler is (231) 534-7200.
- Does Gregory Hessler accept Medicare?
- Gregory Hessler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Hessler's NPI active?
- Yes — Gregory Hessler's NPI (1326156928) 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.