Nayyar Siddique, MD
NPI 1497890610ActiveIndividual· Internal Medicine, Hematology & Oncology· Oceanside, CA
Internal Medicine, Hematology & Oncology (MD) with Dignity Health and 2 other groups, practicing in Oceanside, California. Their prescriptions cost Medicare Part D more than their services did: $1,911,688 for 620 claims, against $51,660 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 7 companies reporting payments in 2025, $1,305 in all, mostly device and supply loans. Lists Benefis Hospitals Inc and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1497890610 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Feb 21, 2007 |
| Last updated in NPPES | Apr 18, 2024 |
| Certified by provider | Apr 18, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A62744 | CA |
| Internal Medicine, Medical Oncology | 207RX0202X | LT20873 | ND |
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); Practitioner - Hematology/Oncology (MN); Practitioner - Internal Medicine (MT); Practitioner - Medical Oncology (ND) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 194 |
|---|---|
| Services billed | 12,430 across 27 procedure codes |
| Paid by Medicare | $51,660 |
Part D prescriptions in 2024
| Prescriptions (claims) | 620 · 801 30-day fills |
|---|---|
| Patients | 170 |
| Total drug cost | $1,911,688 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 1989 |
|---|---|
| Medicare specialty | Hematology/Oncology |
Medical groups
- Dignity HealthRedding, CA · 86 clinicians
- Northern Montana HospitalHavre, MT · 47 clinicians
- Enloe Specialty Physicians IncChico, CA · 24 clinicians
Hospital affiliations
- Benefis Hospitals IncGreat Falls, MT
- Enloe HealthChico, CA
- Mercy Medical Center ReddingRedding, CA
- Northern Montana HospitalHavre, MT
- St Elizabeth Community HospitalRed Bluff, CA
Industry payments (Open Payments)
- 2025$1,305 · 21 payments from 7 companies
- 2024$1,287 · 18 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $1,033 | 13 |
| Abbvie Inc. | $155.63 | 3 |
| Gilead Sciences, Inc. | $30.31 | 1 |
| Aveo Pharmaceuticals, Inc. | $26.38 | 1 |
| Astellas Pharma US Inc | $21.09 | 1 |
What the 2025 payments were for
- Long term medical supply or device loan$999.96 · 12 payments
- Food and Beverage$304.75 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other hematologist-oncologists in Oceanside
- 1306981527
- 1427403641
- 1558546192
- 1215072434
- 1457486433