Doctor profile · Federal record
Dr. William Gretzinger, DO
Emergency Medical Services (Emergency Medicine) Physician · Anesthesiology Physician · Petoskey, MI
- NPI 1518994979
- 20 yrs on file
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
416 Connable Ave, ER Department
Petoskey, MI 49770
(231) 487-4000 - Mailing address
-
930 Spring Street
Petoskey, MI 49770
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- October 9, 2019
- Specialty taxonomy
- 207PE0004X — NUCC code
- State licenses (2)
- Michigan #WG011330 · Michigan #5101011330
- Medicaid
- MI #114081517
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1518994979. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
256
Distinct HCPCS
3
Medicare allowed
$43,603
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 136 | 130 | $175 | |
99284 |
Emergency department visit with moderate level of medical decision making | 60 | 59 | $120 | |
99291 |
Critical care, first 30-74 minutes | 60 | 57 | $210 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 85. This provider delivers 3.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
22
Patients
22
Total drug cost
$154
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Cephalexin | Generic | 22 | 22 | $154 |
Frequently asked questions
What is Dr. William Gretzinger's medical specialty?
Dr. William Gretzinger practices Emergency Medical Services (Emergency Medicine) Physician in Petoskey, MI.
Where does Dr. William Gretzinger practice?
Dr. William Gretzinger practices at 416 Connable Ave, Petoskey, MI 49770. Office phone: 2314874000.
What is Dr. William Gretzinger's NPI?
Dr. William Gretzinger's National Provider Identifier (NPI) is 1518994979, issued by NPPES.
What procedures does Dr. William Gretzinger commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with moderate level of medical decision making (HCPCS 99284); Critical care (HCPCS 99291). Source: CMS Medicare Physician & Other Practitioners file.