Siddhartha Ganguly, M.D.
NPI 1689767261ActiveIndividual· Internal Medicine, Hematology· Houston, TX
Internal Medicine, Hematology (M.D.) with Tmh Physician Associates PLLC and 1 other group, practicing in Houston, Texas. Their prescriptions cost Medicare Part D more than their services did: $2,441,246 for 371 claims, against $33,465 paid for services in 2024. Karyopharm Therapeutics Inc. was the largest of 6 companies reporting payments in 2025, $523.51 in all, mostly food and beverage. Lists Houston Methodist Baytown Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1689767261 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 2, 2006 |
| Last updated in NPPES | Oct 20, 2026 |
| Certified by provider | Oct 20, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology Primary | 207RH0000X | S6620 | 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 - Hematology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 97 |
|---|---|
| Services billed | 407 across 18 procedure codes |
| Paid by Medicare | $33,465 |
Part D prescriptions in 2024
| Prescriptions (claims) | 371 · 427 30-day fills |
|---|---|
| Patients | 34 |
| Total drug cost | $2,441,246 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Hematology |
| Telehealth | Offers telehealth |
Medical groups
- Tmh Physician Associates PLLCKaty, TX · 1,690 clinicians
- Houston Methodist Specialty PhysiciansHouston, TX · 1,528 clinicians
Hospital affiliations
- Houston Methodist Baytown HospitalBaytown, TX
- Houston Methodist Clear Lake HospitalNassau Bay, TX
- Houston Methodist HospitalHouston, TX
- Houston Methodist Sugarland HospitalSugar Land, TX
- Houston Methodist the Woodlands HospitalThe Woodlands, TX
Industry payments (Open Payments)
- 2025$523.51 · 7 payments from 6 companies
- 2024$2,204 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Karyopharm Therapeutics Inc. | $196.29 | 2 |
| Regeneron Pharmaceuticals, Inc. | $125.24 | 1 |
| Janssen Scientific Affairs, LLC | $93.77 | 1 |
| Celgene Corporation | $53.04 | 1 |
| Janssen Biotech, Inc. | $27.80 | 1 |
What the 2025 payments were for
- Food and Beverage$386.26 · 6 payments
- Consulting Fee$137.25 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 49 Internal Medicine, Hematology providers in Houston · All Internal Medicine, Hematology providers in Texas