Byron Andrew Knowles, M.D., PH.D.
NPI 1225586662ActiveIndividual· Dermatology· Modesto, CA
Dermatology (M.D., PH.D.) in Modesto, California, trained at Vanderbilt University School of Medicine (class of 2016). Their prescriptions cost Medicare Part D more than their services did: $944,257 for 1,391 claims, against $170,272 paid for services in 2024. Janssen Biotech, Inc. was the largest of 11 companies reporting payments in 2025, $948.90 in all, mostly food and beverage.
Overview
| NPI | 1225586662 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., PH.D. |
| Sole proprietor | Yes |
| NPI issued | Sep 14, 2016 |
| Last updated in NPPES | Jun 28, 2021 |
| Certified by provider | Jun 28, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | A152031 | CA |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Dermatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 625 |
|---|---|
| Services billed | 4,397 across 53 procedure codes |
| Paid by Medicare | $170,272 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,391 · 1,647 30-day fills |
|---|---|
| Patients | 437 |
| Total drug cost | $944,257 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | Vanderbilt University School of Medicine |
|---|---|
| Graduation year | 2016 |
| Medicare specialty | Dermatology |
| Telehealth | Offers telehealth |
Medical group
- Sutter Valley Medical FoundationModesto, CA · 2,500 clinicians
Industry payments (Open Payments)
- 2025$948.90 · 32 payments from 11 companies
- 2024$886.21 · 28 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $266.48 | 8 |
| Ucb, Inc. | $133.20 | 3 |
| Regeneron Healthcare Solutions, Inc. | $122.29 | 4 |
| Abbvie Inc. | $97.72 | 4 |
| Lilly USA, LLC | $80.45 | 3 |
What the 2025 payments were for
- Food and Beverage$933.63 · 31 payments
- Education$15.27 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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