Doctor profile · Federal record
Dr. Gregory Mahr, M.D.
Psychiatry Physician (CMS: Psychiatry) · Ferndale, MI
- NPI 1841350717
- Accepts Medicare
- 43 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
Kingswood Hospital, 10300 West Eight Mile Road
Ferndale, MI 48220
(248) 691-4865
fax (248) 691-4877
Credentials & registration
- NPI registered
- December 2006 — 20 yrs on file
- Profile last updated
- July 31, 2018
- Year of graduation
- 1983 — 43 yrs since
- Specialty taxonomy
- 2084P0800X — NUCC code
- State license (1)
- Michigan #4301047989
- Medicaid
- MI #309201510
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1841350717. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
113
Distinct HCPCS
4
Medicare allowed
$15,508
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
90792 |
Psychiatric diagnostic evaluation with medical services | 62 | 60 | $173 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 21 | 21 | $133 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 15 | 13 | $51 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 15 | 13 | $81 |
In context: peer comparison
Among 2 peers in Ferndale Psychiatry Physician, average services per provider: 33. This provider delivers 3.4× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
440
Patients
27
Total drug cost
$7,826
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Alprazolam | Generic | 104 | 16 | $712 |
| Quetiapine Fumarate | Generic | 52 | 0 | $1,097 |
| Lorazepam | Generic | 39 | 0 | $251 |
| Buspirone Hcl | Generic | 37 | 0 | $849 |
| Duloxetine Hcl | Generic | 33 | 0 | $1,596 |
| Trazodone Hcl | Generic | 29 | 11 | $153 |
| Sertraline Hcl | Generic | 26 | 0 | $210 |
| Dextroamphetamine-Amphetamine (Dextroamphetamine/Amphetamine) | Brand | 21 | 0 | $968 |
| Zolpidem Tartrate | Generic | 18 | 0 | $67 |
| Bupropion Hcl SR (Bupropion Hcl) | Brand | 15 | 0 | $678 |
Hospital affiliations
Frequently asked questions
What is Dr. Gregory Mahr's medical specialty?
Dr. Gregory Mahr practices Psychiatry Physician in Ferndale, MI.
Where does Dr. Gregory Mahr practice?
Dr. Gregory Mahr practices at Kingswood Hospital, Ferndale, MI 48220. Office phone: 2486914865.
What is Dr. Gregory Mahr's NPI?
Dr. Gregory Mahr's National Provider Identifier (NPI) is 1841350717, issued by NPPES.
Does Dr. Gregory Mahr accept Medicare assignment?
Yes. Dr. Gregory Mahr accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gregory Mahr commonly perform?
Top Medicare-reported procedures in 2023: Psychiatric diagnostic evaluation with medical services (HCPCS 90792); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222); Subsequent hospital care with straightforward or low level of medical decision making (HCPCS 99231). Source: CMS Medicare Physician & Other Practitioners file.