Subrahmanyam Nasika, M.D.
NPI 1548449846ActiveIndividual· Internal Medicine, Nephrology· Stockton, CA
Internal Medicine, Nephrology (M.D.) with San Joaquin Kidney Clinic, Inc, practicing in Stockton, California. Their prescriptions cost Medicare Part D more than their services did: $1,173,569 for 5,046 claims, against $288,081 paid for services in 2024. Otsuka America Pharmaceutical, Inc. was the largest of 15 companies reporting payments in 2025, $943.60 in all, mostly food and beverage. Lists Adventist Health Lodi Memorial and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1548449846 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 2, 2007 |
| Last updated in NPPES | Sep 9, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A108186 | 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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 764 |
|---|---|
| Services billed | 2,927 across 13 procedure codes |
| Paid by Medicare | $288,081 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,046 · 11,636 30-day fills |
|---|---|
| Patients | 547 |
| Total drug cost | $1,173,569 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Nephrology |
Medical group
- San Joaquin Kidney Clinic, IncStockton, CA · 8 clinicians
Hospital affiliations
- Adventist Health Lodi MemorialLodi, CA
- Dameron HospitalStockton, CA
- Mark Twain Medical CenterSan Andreas, CA
- Memorial Medical CenterModesto, CA
- St Joseph's Medical Center of StocktonStockton, CA
Other facilities
- Davita Delta Sierra Dialysis CenterDialysis facility · Stockton, CA
- Davita Port City DialysisDialysis facility · Stockton, CA
- Davita Stockton Kidney CenterDialysis facility · Stockton, CA
- Rai - West March - StocktonDialysis facility · Stockton, CA
- Shc StocktonDialysis facility · Stockton, CA
Industry payments (Open Payments)
- 2025$943.60 · 46 payments from 15 companies
- 2024$1,039 · 49 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $184.13 | 7 |
| Ardelyx, Inc. | $134.71 | 8 |
| Calliditas Therapeutics US Inc. | $100.25 | 4 |
| Amgen Inc. | $97.29 | 5 |
| Novartis Pharmaceuticals Corporation | $93.36 | 5 |
What the 2025 payments were for
- Food and Beverage$943.60 · 46 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 23 nephrologists in Stockton · All nephrologists in California