Gregory S. Johnston, M.D.
NPI 1457344137ActiveIndividual· Emergency Medicine· New London, CT
Emergency Medicine (M.D.) with Emergency Professional Services PC and 1 other group, practicing in New London, Connecticut. 303 Medicare patients in 2024, $40,883 paid; nearly all of their 144 Part D prescriptions were generic (97%). Boston Scientific Corporation reported $31.75 in payments in 2025, mostly food and beverage. Lists Banner Goldfield Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1457344137 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 26, 2005 |
| Last updated in NPPES | Oct 29, 2024 |
| Reactivated | Oct 29, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | 64109 | CT |
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 - Emergency Medicine (AZ); Practitioner - Emergency Medicine (CT); Practitioner - Emergency Medicine (NH); Practitioner - Emergency Medicine (NM) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 303 |
|---|---|
| Services billed | 355 across 15 procedure codes |
| Paid by Medicare | $40,883 |
Part D prescriptions in 2024
| Prescriptions (claims) | 144 · 146 30-day fills |
|---|---|
| Patients | 105 |
| Total drug cost | $3,719 |
| Generic share | 97% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Emergency Medicine |
Medical groups
- Emergency Professional Services PCApache Junction, AZ · 108 clinicians
- Emergency Medicine Services of Nh, LLCManchester, NH · 67 clinicians
Hospital affiliations
- Banner Goldfield Medical CenterApache Junction, AZ
- Banner Ironwood Medical CenterQueen Creek, AZ
- Catholic Medical CenterManchester, NH
Industry payments (Open Payments)
- 2025$31.75 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boston Scientific Corporation | $31.75 | 1 |
What the 2025 payments were for
- Food and Beverage$31.75 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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