Mark Gregory Marrone, MD
NPI 1003809575ActiveIndividual· Internal Medicine, Nephrology· Livonia, MI
Internal Medicine, Nephrology (MD) with Hypertension Nephrology Associates PC, practicing in Livonia, Michigan. In 2024 Medicare paid $217,651 for 462 patients, and Part D covered 1,364 of their prescriptions, 86% of them generic. Bayer Healthcare Pharmaceuticals Inc. was the largest of 18 companies reporting payments in 2025, $1,217 in all, mostly food and beverage. Lists Beaumont Hospital - Dearborn and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1003809575 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 30, 2005 |
| Last updated in NPPES | Sep 9, 2022 |
| Certified by provider | Sep 9, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 4301058209 | MI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 462 |
|---|---|
| Services billed | 2,233 across 31 procedure codes |
| Paid by Medicare | $217,651 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,364 · 2,943 30-day fills |
|---|---|
| Patients | 206 |
| Total drug cost | $237,121 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Nephrology |
Medical group
- Hypertension Nephrology Associates PCLivonia, MI · 13 clinicians
Hospital affiliations
- Beaumont Hospital - DearbornDearborn, MI
- Beaumont Hospital - Farmington HillsFarmington Hills, MI
- Beaumont Hospital Royal OakRoyal Oak, MI
- Henry Ford Health St John HospitalDetroit, MI
- St Joe Mercy Hospital System LivoniaLivonia, MI
Other facilities
- Fmc - Botsford ParkDialysis facility · Livonia, MI
- Botsford HospitalInpatient rehabilitation facility · Farmington Hills, MI
Industry payments (Open Payments)
- 2025$1,217 · 48 payments from 18 companies
- 2024$1,086 · 44 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $192.03 | 9 |
| Novo Nordisk Inc | $157.03 | 3 |
| Novartis Pharmaceuticals Corporation | $124.54 | 6 |
| Otsuka America Pharmaceutical, Inc. | $118.73 | 5 |
| Ardelyx, Inc. | $117.06 | 5 |
What the 2025 payments were for
- Food and Beverage$1,187 · 46 payments
- Education$30.72 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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