Johnathon Toma Markus, M.D.
NPI 1548521461ActiveIndividual· Hospitalist· Clinton Twp, MI
Hospitalist (M.D.) in Clinton Twp, Michigan, trained at Wayne State University School of Medicine (class of 2012). Their prescriptions cost Medicare Part D more than their services did: $2,261,459 for 1,633 claims, against $62,709 paid for services in 2024. Abbvie Inc. was the largest of 24 companies reporting payments in 2025, $3,965 in all, mostly food and beverage.
Overview
| NPI | 1548521461 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 6, 2012 |
| Last updated in NPPES | Apr 23, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Hospitalist Primary | 208M00000X | 4301106661 | MI |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Gastroenterology (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 363 |
|---|---|
| Services billed | 539 across 35 procedure codes |
| Paid by Medicare | $62,709 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,633 · 2,536 30-day fills |
|---|---|
| Patients | 513 |
| Total drug cost | $2,261,459 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | Wayne State University School of Medicine |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Tri-County Gastroenterology, PCClinton Twp, MI · 9 clinicians
Hospital affiliation
- McLaren MacombMount Clemens, MI
Industry payments (Open Payments)
- 2025$3,965 · 193 payments from 24 companies
- 2024$3,726 · 174 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $1,351 | 65 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $375.04 | 17 |
| Janssen Biotech, Inc. | $319.28 | 16 |
| Takeda Pharmaceuticals U.S.A., Inc. | $293.84 | 15 |
| Ardelyx, Inc. | $290.02 | 17 |
What the 2025 payments were for
- Food and Beverage$3,965 · 193 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other hospitalists in Clinton Twp
- 1619611100
- 1063923472