Clifford John Sewell, M.D.
NPI 1851437123ActiveIndividual· Internal Medicine· Danville, CA
Internal Medicine (M.D.) in Danville, California, trained at Virginia Commonwealth University, School of Medicine (class of 1994). Their prescriptions cost Medicare Part D more than their services did: $487,599 for 3,806 claims, against $28,408 paid for services in 2024. Amgen Inc. was the largest of 2 companies reporting payments in 2025, $110.28 in all, mostly food and beverage.
Overview
| NPI | 1851437123 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jan 30, 2007 |
| Last updated in NPPES | Oct 1, 2020 |
| Certified by provider | Oct 1, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A55442 | 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 | 163 |
|---|---|
| Services billed | 486 across 14 procedure codes |
| Paid by Medicare | $28,408 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,806 · 7,294 30-day fills |
|---|---|
| Patients | 219 |
| Total drug cost | $487,599 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Virginia Commonwealth University, School of Medicine |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | Internal Medicine |
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
- San Ramon Regional Medical CenterSan Ramon, CA
- Stanford Health Care Tri-ValleyPleasanton, CA
- UCSF Health Saint Francis HospitalSan Francisco, CA
Other facilities
- Accentcare Home Health of California, IncHome health agency · San Ramon, CA
- One Health Home Care, IncHome health agency · Livermore, CA
Industry payments (Open Payments)
- 2025$110.28 · 5 payments from 2 companies
- 2024$161.44 · 7 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $60.83 | 3 |
| Vertex Pharmaceuticals Incorporated | $49.45 | 2 |
What the 2025 payments were for
- Food and Beverage$110.28 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 32 internal medicine physicians in Danville · All internal medicine physicians in California