Greg Vaughan Manson, MD
NPI 1689882961ActiveIndividual· Internal Medicine, Hematology & Oncology· Massillon, OH
Internal Medicine, Hematology & Oncology (MD) in Massillon, Ohio, trained at Medical College of Ohio (class of 2006). Their prescriptions cost Medicare Part D more than their services did: $6,543,541 for 1,744 claims, against $52,655 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 3 companies reporting payments in 2025, $141.67 in all, mostly food and beverage.
Overview
| NPI | 1689882961 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | May 18, 2007 |
| Last updated in NPPES | Nov 22, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 35092423 | OH |
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 - Hematology/Oncology (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 196 |
|---|---|
| Services billed | 622 across 14 procedure codes |
| Paid by Medicare | $52,655 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,744 · 2,379 30-day fills |
|---|---|
| Patients | 238 |
| Total drug cost | $6,543,541 |
| Generic share | 67% of claims |
Education and affiliations
| Medical school | Medical College of Ohio |
|---|---|
| Graduation year | 2006 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Hematology, Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Summa Physicians LLCAkron, OH · 671 clinicians
Hospital affiliations
- Summa Health SystemAkron, OH
- Summa Western Reserve HospitalCuyahoga Falls, OH
Industry payments (Open Payments)
- 2025$141.67 · 6 payments from 3 companies
- 2024$129.17 · 6 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $71.52 | 3 |
| Genentech USA, Inc. | $48.80 | 2 |
| Beone Medicines USA, Inc. | $21.35 | 1 |
What the 2025 payments were for
- Food and Beverage$141.67 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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