Mamatha Siricilla, M.B.B.S
NPI 1487967576ActiveIndividual· Internal Medicine, Medical Oncology· Cameron Park, CA
Internal Medicine, Medical Oncology (M.B.B.S) with Stanford Health Care and 1 other group, practicing in Cameron Park, California. Their prescriptions cost Medicare Part D more than their services did: $1,496,697 for 1,212 claims, against $158,869 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 34 companies reporting payments in 2025, $2,125 in all, mostly food and beverage. Lists Clovis Community Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1487967576 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.B.B.S |
| Sole proprietor | No |
| NPI issued | Jul 19, 2010 |
| Last updated in NPPES | Oct 8, 2024 |
| Certified by provider | Oct 8, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | A148859 | CA |
| Internal Medicine | 207R00000X | A148859 | CA |
| Internal Medicine, Hematology | 207RH0000X | A148859 | CA |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 148859 | 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 - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 442 |
|---|---|
| Services billed | 15,796 across 56 procedure codes |
| Paid by Medicare | $158,869 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,212 · 1,827 30-day fills |
|---|---|
| Patients | 296 |
| Total drug cost | $1,496,697 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2006 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Stanford Health CareStanford, CA · 3,122 clinicians
- Community Health PartnersClovis, CA · 504 clinicians
Hospital affiliations
- Clovis Community Medical CenterClovis, CA
- Community Regional Medical CenterFresno, CA
- Eden Medical CenterCastro Valley, CA
- Marshall Medical CenterPlacerville, CA
- Stanford Health Care Tri-ValleyPleasanton, CA
Industry payments (Open Payments)
- 2025$2,125 · 103 payments from 34 companies
- 2024$2,165 · 111 payments from 31 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $401.20 | 34 |
| Genentech USA, Inc. | $183.19 | 8 |
| Novartis Pharmaceuticals Corporation | $140.44 | 6 |
| Seagen Inc. | $99.99 | 1 |
| Merck Sharp & Dohme LLC | $96.23 | 4 |
What the 2025 payments were for
- Food and Beverage$2,025 · 102 payments
- Education$99.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records