Gregory Ross Johnston, D.O.
NPI 1982866109ActiveIndividual· Surgery· Toledo, OH
Surgery (D.O.) in Toledo, Ohio, trained at Michigan State University College of Osteopathic Medicine (class of 2008). 65 Medicare patients in 2024, $30,412 paid; nearly all of their 389 Part D prescriptions were generic (92%). W. L. Gore & Associates, Inc. was the largest of 3 companies reporting payments in 2025, $320.87 in all, mostly food and beverage.
Overview
| NPI | 1982866109 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | Yes |
| NPI issued | Jun 29, 2008 |
| Last updated in NPPES | Nov 19, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | 34.011316 | OH |
| Surgery | 208600000X | 5101017786 | 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 - General Surgery (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 65 |
|---|---|
| Services billed | 158 across 26 procedure codes |
| Paid by Medicare | $30,412 |
Part D prescriptions in 2024
| Prescriptions (claims) | 389 · 515 30-day fills |
|---|---|
| Patients | 111 |
| Total drug cost | $8,674 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | Michigan State University College of Osteopathic Medicine |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | General Surgery |
Medical groups
- Mercy Health Physicians North Specialty Care LLCMaumee, OH · 355 clinicians
- Mercy Medical Partners Northern Region Specialty Care LLCDefiance, OH · 86 clinicians
Hospital affiliations
- Mercy Health - Defiance HospitalDefiance, OH
- Mercy Health - Tiffin HospitalTiffin, OH
- Mercy St Vincent Medical CenterToledo, OH
Industry payments (Open Payments)
- 2025$320.87 · 4 payments from 3 companies
- 2024$1,055 · 10 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| W. L. Gore & Associates, Inc. | $183.19 | 2 |
| Aimmune Therapeutics, Inc. | $114.51 | 1 |
| Ethicon US, LLC | $23.17 | 1 |
What the 2025 payments were for
- Food and Beverage$320.87 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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