Doctor profile · Federal record
Dr. Gary Hammer, MD
Endocrinology, Diabetes & Metabolism Physician (CMS: Endocrinology) · Cardiovascular Disease Physician · Ann Arbor, MI
- NPI 1871676791
- Accepts Medicare
- 34 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
1500 E Medical Center Dr
Ann Arbor, MI 481095000
(734) 936-4000 - Additional location
-
1500 East Medical Center Dr, 1St Floor Cancer & Geriatrics Center
Ann Arbor, MI 481095354
(734) 763-4876 - Mailing address
-
3621 S State St
Ann Arbor, MI 481081633
Credentials & registration
- NPI registered
- October 2006 — 20 yrs on file
- Profile last updated
- October 2, 2025
- Year of graduation
- 1992 — 34 yrs since
- Specialty taxonomy
- 207RE0101X — NUCC code
- State license (1)
- Michigan #4301075475
- Medicaid
- MI #4177663
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1871676791. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$5,000
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Neurocrine Biosciences, Inc. | 1 | $5,000.00 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
11
Patients
0
Total drug cost
$1,243
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydrocortisone | Generic | 11 | 0 | $1,243 |
Hospital affiliations
Frequently asked questions
What is Dr. Gary Hammer's medical specialty?
Dr. Gary Hammer practices Endocrinology, Diabetes & Metabolism Physician in Ann Arbor, MI.
Where does Dr. Gary Hammer practice?
Dr. Gary Hammer practices at 1500 E Medical Center Dr, Ann Arbor, MI 481095000. Office phone: 7349364000.
What is Dr. Gary Hammer's NPI?
Dr. Gary Hammer's National Provider Identifier (NPI) is 1871676791, issued by NPPES.
Does Dr. Gary Hammer accept Medicare assignment?
Yes. Dr. Gary Hammer accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.