Muthusamy Muthiah, MD
NPI 1679541148ActiveIndividual· Internal Medicine, Cardiovascular Disease· Pomona, CA
Internal Medicine, Cardiovascular Disease (MD) with Chaparral Medical Group Inc, practicing in Pomona, California. Their prescriptions cost Medicare Part D more than their services did: $1,317,690 for 5,417 claims, against $400,486 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 6 companies reporting payments in 2025, $185.97 in all, mostly food and beverage. Lists Casa Colina Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1679541148 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 10, 2006 |
| Last updated in NPPES | May 3, 2021 |
| Certified by provider | May 3, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | A51517 | CA |
| Internal Medicine | 207R00000X | A51517 | 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 - Cardiovascular Disease (Cardiology) (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,153 |
|---|---|
| Services billed | 4,611 across 36 procedure codes |
| Paid by Medicare | $400,486 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,417 · 13,144 30-day fills |
|---|---|
| Patients | 712 |
| Total drug cost | $1,317,690 |
| Generic share | 75% of claims |
Education and affiliations
| Graduation year | 1992 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Secondary specialties | Internal Medicine |
Medical group
- Chaparral Medical Group IncPomona, CA · 65 clinicians
Hospital affiliations
- Casa Colina HospitalPomona, CA
- Kaiser Foundation Hospital Fontana/OntarioFontana, CA
- Pomona Valley Hospital Medical CenterPomona, CA
- San Antonio Regional HospitalUpland, CA
Industry payments (Open Payments)
- 2025$185.97 · 10 payments from 6 companies
- 2024$321.53 · 19 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $114.03 | 5 |
| Kestra Medical Technology Services, Inc. | $18.35 | 1 |
| Pfizer Inc. | $17.17 | 1 |
| E.R. Squibb & Sons, L.L.C. | $17.01 | 1 |
| Amgen Inc. | $15.81 | 1 |
What the 2025 payments were for
- Food and Beverage$185.97 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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