Doctor profile · Federal record
Dr. Robert Grenn, MD
Psychiatry Physician · Caro, MI
- NPI 1366079915
- 6 yrs on file
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
2040 Chambers RD
Caro, MI 487239240
(989) 673-3191
Credentials & registration
- NPI registered
- March 2020 — 6 yrs on file
- Profile last updated
- April 11, 2026
- Specialty taxonomy
- 2084P0800X — NUCC code
- State license (1)
- Michigan #4301508925
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1366079915. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$125
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 1 | $124.97 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
299
Patients
28
Total drug cost
$36,924
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Escitalopram Oxalate | Generic | 39 | 0 | $460 |
| Duloxetine Hcl | Generic | 37 | 0 | $1,095 |
| Trazodone Hcl | Generic | 34 | 16 | $378 |
| Sertraline Hcl | Generic | 29 | 0 | $437 |
| Hydroxyzine Hcl | Generic | 27 | 12 | $352 |
| Gabapentin | Generic | 22 | 0 | $278 |
| Aripiprazole | Generic | 19 | 0 | $943 |
| Buspirone Hcl | Generic | 17 | 0 | $686 |
| Fluoxetine Hcl | Generic | 16 | 0 | $154 |
| Benztropine Mesylate | Generic | 13 | 0 | $146 |
Frequently asked questions
What is Dr. Robert Grenn's medical specialty?
Dr. Robert Grenn practices Psychiatry Physician in Caro, MI.
Where does Dr. Robert Grenn practice?
Dr. Robert Grenn practices at 2040 Chambers RD, Caro, MI 487239240. Office phone: 9896733191.
What is Dr. Robert Grenn's NPI?
Dr. Robert Grenn's National Provider Identifier (NPI) is 1366079915, issued by NPPES.