Mark Geoffrey Loomus, M.D
NPI 1821198599ActiveIndividual· Psychiatry & Neurology, Neurology· Perrysburg, OH
Psychiatry & Neurology, Neurology (M.D) in Perrysburg, Ohio, trained at Wayne State University School of Medicine (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $2,176,569 for 3,723 claims, against $46,284 paid for services in 2024. Abbvie Inc. was the largest of 8 companies reporting payments in 2025, $1,460 in all, mostly food and beverage.
Overview
| NPI | 1821198599 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | No |
| NPI issued | Sep 23, 2006 |
| Last updated in NPPES | Nov 5, 2025 |
| Certified by provider | Nov 5, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neurology Primary | 2084N0400X | 35059646 | OH |
| Psychiatry & Neurology, Neurology | 2084N0400X | 4301049041 | 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 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Neurology (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 282 |
|---|---|
| Services billed | 906 across 18 procedure codes |
| Paid by Medicare | $46,284 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,723 · 6,056 30-day fills |
|---|---|
| Patients | 434 |
| Total drug cost | $2,176,569 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | Wayne State University School of Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Neurology |
| Secondary specialties | Internal Medicine |
Medical groups
- Promedica Central PhysiciansToledo, OH · 785 clinicians
- Promedica Multi Specialty PhysiciansToledo, OH · 270 clinicians
Hospital affiliations
- Bay Park Community HospitalOregon, OH
- Fostoria Community HospitalFostoria, OH
- Memorial HospitalFremont, OH
- Mercy St Vincent Medical CenterToledo, OH
- Promedica Toledo HospitalToledo, OH
Industry payments (Open Payments)
- 2025$1,460 · 95 payments from 8 companies
- 2024$974.88 · 66 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $902.12 | 78 |
| Novartis Pharmaceuticals Corporation | $151.73 | 10 |
| Tg Therapeutics, Inc. | $124.22 | 1 |
| Eisai Inc. | $122.57 | 1 |
| Genentech USA, Inc. | $58.70 | 2 |
What the 2025 payments were for
- Food and Beverage$1,460 · 95 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Psychiatry & Neurology, Neurology providers in Perrysburg
- 1457632309
- 1659786622