Matthew T. Johnson, MD
NPI 1659487395ActiveIndividual· Internal Medicine· Fairfield, CA
Internal Medicine (MD) in Fairfield, California, licensed in CA, with an NPI issued in August 2006. Part D covered 22 prescriptions written in 2024, 95% of them generic. Astellas Pharma US Inc was the largest of 2 companies reporting payments in 2025, $162.97 in all, mostly food and beverage.
Overview
| NPI | 1659487395 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 23, 2006 |
| Last updated in NPPES | Mar 7, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | G38149 | CA |
| Internal Medicine, Infectious Disease | 207RI0200X | G38149 | CA |
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 - Internal Medicine (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 22 · 42 30-day fills |
|---|---|
| Total drug cost | $300.16 |
| Generic share | 95% of claims |
Industry payments (Open Payments)
- 2025$162.97 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astellas Pharma US Inc | $114.89 | 1 |
| Teleflex LLC | $48.08 | 1 |
What the 2025 payments were for
- Food and Beverage$162.97 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 65 internal medicine physicians in Fairfield · All internal medicine physicians in California