Anthony T. Bernens, MD
NPI 1215983440ActiveIndividual· Internal Medicine· Walnut Creek, CA
Internal Medicine (MD) in Walnut Creek, California, trained at Wright State University Boonshoft School of Medicine (class of 1994). Their prescriptions cost Medicare Part D more than their services did: $450,869 for 5,442 claims, against $275,122 paid for services in 2024. Exact Sciences Corporation was the largest of 6 companies reporting payments in 2025, $288.05 in all, mostly food and beverage.
Overview
| NPI | 1215983440 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 26, 2006 |
| Last updated in NPPES | Nov 12, 2024 |
| Certified by provider | Nov 12, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A55164 | 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) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 260 |
|---|---|
| Services billed | 3,304 across 54 procedure codes |
| Paid by Medicare | $275,122 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,442 · 10,984 30-day fills |
|---|---|
| Patients | 258 |
| Total drug cost | $450,869 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Wright State University Boonshoft School of Medicine |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Bass Medical GroupChico, CA · 291 clinicians
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
Other facilities
- Comfort Assisting, IncHome health agency · Walnut Creek, CA
- John Muir Home Health ServicesHome health agency · Concord, CA
- One Health Home Care, IncHome health agency · Livermore, CA
- Prohealth Home Care, IncHome health agency · Stockton, CA
Industry payments (Open Payments)
- 2025$288.05 · 12 payments from 6 companies
- 2024$379.81 · 16 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $95.89 | 4 |
| Abbvie Inc. | $69.66 | 3 |
| Glaxosmithkline, LLC. | $37.66 | 2 |
| Kyowa Kirin, Inc. | $29.89 | 1 |
| Astrazeneca Pharmaceuticals LP | $27.55 | 1 |
What the 2025 payments were for
- Food and Beverage$288.05 · 12 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 204 internal medicine physicians in Walnut Creek · All internal medicine physicians in California