Doctor profile · Federal record
Dr. Gregory Downer, M.D.
Nephrology Physician (CMS: Nephrology) · Muskegon, MI
- NPI 1285635367
- Accepts Medicare
- 45 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1250 Mercy Dr, Suite 101
Muskegon, MI 494441881
(231) 733-1912
fax (231) 737-4603
Credentials & registration
- NPI registered
- August 2005 — 21 yrs on file
- Profile last updated
- February 17, 2014
- Year of graduation
- 1981 — 45 yrs since
- Specialty taxonomy
- 207RN0300X — NUCC code
- State license (1)
- Michigan #4301048039
- Medicaid
- MI #1816250
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1285635367. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,098
Distinct HCPCS
9
Medicare allowed
$184,689
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 326 | 99 | $76 | |
90960 |
Dialysis services, 4 or more physician visits per month (20 years or older) | 306 | 148 | $332 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 176 | 153 | $111 | |
90935 |
Hemodialysis procedure with physician evaluation | 109 | 43 | $69 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 78 | 67 | $126 | |
90961 |
Dialysis services, 2-3 physician visits per month (20 years or older) | 38 | 35 | $277 | |
90966 |
Home dialysis services per month (20 years or older) | 32 | 13 | $282 | |
81000 |
Manual urinalysis test with examination using microscope, non-automated | 21 | 19 | $4 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 12 | 12 | $151 |
In context: peer comparison
Among 5 peers in Muskegon Nephrology Physician, average services per provider: 105. This provider delivers 10× the peer median.Open Payments
Industry payments received
All-time total
$27
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Travere Therapeutics, INC. | 1 | $27.32 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
931
Patients
312
Total drug cost
$170,101
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Farxiga (Dapagliflozin Propanediol) | Brand | 128 | 34 | $96,231 |
| Amlodipine Besylate | Generic | 125 | 46 | $1,288 |
| Torsemide | Generic | 82 | 34 | $1,711 |
| Losartan Potassium | Generic | 77 | 33 | $1,574 |
| Lisinopril | Generic | 71 | 27 | $572 |
| Doxazosin Mesylate | Generic | 66 | 25 | $1,499 |
| Calcium Acetate | Generic | 65 | 23 | $7,798 |
| Carvedilol | Generic | 63 | 24 | $724 |
| Potassium Chloride | Generic | 45 | 16 | $1,606 |
| Jardiance (Empagliflozin) | Brand | 42 | 0 | $37,043 |
Hospital affiliations
Frequently asked questions
What is Dr. Gregory Downer's medical specialty?
Dr. Gregory Downer practices Nephrology Physician in Muskegon, MI.
Where does Dr. Gregory Downer practice?
Dr. Gregory Downer practices at 1250 Mercy Dr, Muskegon, MI 494441881. Office phone: 2317331912.
What is Dr. Gregory Downer's NPI?
Dr. Gregory Downer's National Provider Identifier (NPI) is 1285635367, issued by NPPES.
Does Dr. Gregory Downer accept Medicare assignment?
Yes. Dr. Gregory Downer accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gregory Downer commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Dialysis services, 4 or more physician visits per month (20 years or older) (HCPCS 90960); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.