Gregory H. Downer, M.D.
NPI 1285635367ActiveIndividual· Internal Medicine, Nephrology· Muskegon, MI
Internal Medicine, Nephrology (M.D.) in Muskegon, Michigan, trained at Indiana University School of Medicine (class of 1981). Their prescriptions cost Medicare Part D more than their services did: $322,860 for 1,332 claims, against $94,779 paid for services in 2024. Otsuka America Pharmaceutical, Inc. was the largest of 3 companies reporting payments in 2025, $86.36 in all, mostly food and beverage.
Overview
| NPI | 1285635367 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 10, 2005 |
| Last updated in NPPES | Feb 17, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 4301048039 | MI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 379 |
|---|---|
| Services billed | 888 across 23 procedure codes |
| Paid by Medicare | $94,779 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,332 · 2,540 30-day fills |
|---|---|
| Patients | 398 |
| Total drug cost | $322,860 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical group
- West Michigan Nephrology PLLCMuskegon, MI · 8 clinicians
Hospital affiliations
- Corewell Health Gerber HospitalFremont, MI
- Corewell Health Ludington HospitalLudington, MI
- Mercy Health Lakeshore CampusShelby, MI
- Spectrum HealthGrand Rapids, MI
- Trinity Health Muskegon HospitalMuskegon, MI
Other facilities
- Davita Apple Avenue DialysisDialysis facility · Muskegon, MI
- Davita Ludington DialysisDialysis facility · Ludington, MI
- Davita Muskegon DialysisDialysis facility · Muskegon, MI
- Davita Newaygo County DialysisDialysis facility · Fremont, MI
- Davita Pdi-Grand HavenDialysis facility · Grand Haven, MI
Industry payments (Open Payments)
- 2025$86.36 · 3 payments from 3 companies
- 2024$27.32 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $34.06 | 1 |
| Travere Therapeutics, Inc. | $28.25 | 1 |
| Medtronic, Inc. | $24.05 | 1 |
What the 2025 payments were for
- Food and Beverage$86.36 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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