Sreedhar A. Mandayam, M.D.
NPI 1225051048ActiveIndividual· Internal Medicine, Nephrology· Houston, TX
Internal Medicine, Nephrology (M.D.) with Physicians Referral Service, practicing in Houston, Texas. In 2024 Medicare paid $101,884 for 345 patients, and Part D covered 334 of their prescriptions, 78% of them generic. Calliditas Therapeutics US Inc. was the largest of 24 companies reporting payments in 2025, $94,218 in all, mostly honoraria.
Overview
| NPI | 1225051048 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 25, 2006 |
| Last updated in NPPES | Sep 28, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | N3861 | TX |
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 (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 345 |
|---|---|
| Services billed | 925 across 22 procedure codes |
| Paid by Medicare | $101,884 |
Part D prescriptions in 2024
| Prescriptions (claims) | 334 · 580 30-day fills |
|---|---|
| Patients | 65 |
| Total drug cost | $59,357 |
| Generic share | 78% of claims |
Education and affiliations
| Graduation year | 1995 |
|---|---|
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Physicians Referral ServiceHouston, TX · 2,765 clinicians
Industry payments (Open Payments)
- 2025$94,218 · 169 payments from 24 companies
- 2024$124,549 · 203 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Calliditas Therapeutics US Inc. | $57,938 | 62 |
| Kyowa Kirin, Inc. | $9,196 | 9 |
| Otsuka America Pharmaceutical, Inc. | $7,878 | 8 |
| Novartis Pharmaceuticals Corporation | $4,428 | 12 |
| Travere Therapeutics, Inc. | $3,533 | 13 |
What the 2025 payments were for
- Honoraria$46,400 · 21 payments
- Consulting Fee$18,451 · 7 payments
- Travel and Lodging$13,975 · 38 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$8,578 · 3 payments
- Food and Beverage$6,708 · 98 payments
- Education$106.90 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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