Cesar Koa Ang, MD
NPI 1225010218ActiveIndividual· Internal Medicine· Placerville, CA
Internal Medicine (MD) with Marshall Medical Center, practicing in Placerville, California. Their prescriptions cost Medicare Part D more than their services did: $742,586 for 10,185 claims, against $146,227 paid for services in 2024. Amgen Inc. was the largest of 7 companies reporting payments in 2025, $200.99 in all, mostly food and beverage. Lists Marshall Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1225010218 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 16, 2005 |
| Last updated in NPPES | Dec 18, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | C50396 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 792 |
|---|---|
| Services billed | 1,803 across 30 procedure codes |
| Paid by Medicare | $146,227 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,185 · 20,064 30-day fills |
|---|---|
| Patients | 865 |
| Total drug cost | $742,586 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 1986 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Marshall Medical CenterPlacerville, CA · 176 clinicians
Hospital affiliations
- Marshall Medical CenterPlacerville, CA
- University of California Davis Medical CenterSacramento, CA
Other facilities
- Alpine Home Health Services LLCHome health agency · Sacramento, CA
- Bellestar Home Health Care, IncHome health agency · Folsom, CA
- Hearts Home Healthcare, IncHome health agency · Folsom, CA
- Marshall Home CareHome health agency · Diamond Springs, CA
- Rx Staffing and Home CareHome health agency · Sacramento, CA
- Snowline HealthHospice · Diamond Springs, CA
Industry payments (Open Payments)
- 2025$200.99 · 11 payments from 7 companies
- 2024$536.19 · 27 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $78.43 | 4 |
| Abbott Laboratories | $36.62 | 2 |
| Cranial Technologies, Inc | $19.92 | 1 |
| Glaxosmithkline, LLC. | $18.47 | 1 |
| Pfizer Inc. | $17.09 | 1 |
What the 2025 payments were for
- Food and Beverage$200.99 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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