Thiruvoipati Nandakumar, M.D.
NPI 1598773632ActiveIndividual· Internal Medicine· Redding, CA
Internal Medicine (M.D.) with Shasta Regional Medical Group Inc, practicing in Redding, California. In 2024 Medicare paid $353,768 for 433 patients, and Part D covered 633 of their prescriptions, 85% of them generic. Zoll Services LLC (A/K/A Zoll Lifecor Corp) reported $91.05 in payments in 2025, mostly food and beverage. Lists Mercy Medical Center of Mt Shasta and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1598773632 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 4, 2006 |
| Last updated in NPPES | Jun 12, 2023 |
| Certified by provider | Jun 12, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A61639 | CA |
| Specialist | 174400000X | A61639 | 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 | 433 |
|---|---|
| Services billed | 5,465 across 13 procedure codes |
| Paid by Medicare | $353,768 |
Part D prescriptions in 2024
| Prescriptions (claims) | 633 · 656 30-day fills |
|---|---|
| Patients | 100 |
| Total drug cost | $44,254 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 1978 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Shasta Regional Medical Group IncRedding, CA · 33 clinicians
Hospital affiliations
- Mercy Medical Center of Mt ShastaMount Shasta, CA
- Mercy Medical Center ReddingRedding, CA
- Shasta Regional Medical CenterRedding, CA
- Trinity HospitalWeaverville, CA
Other facilities
- Vibra Hospital of Northern CaliforniaLong-term care hospital · Redding, CA
- Vibra Hospital of Northern California D/P SnfNursing home · Redding, CA
Industry payments (Open Payments)
- 2025$91.05 · 1 payment from 1 company
- 2024$146.78 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $91.05 | 1 |
What the 2025 payments were for
- Food and Beverage$91.05 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 57 internal medicine physicians in Redding · All internal medicine physicians in California