Radha Ann Tamerisa, M.D.
NPI 1366440653ActiveIndividual· Internal Medicine, Gastroenterology· Katy, TX
Internal Medicine, Gastroenterology (M.D.) with Houston Regional Gastroenterology Institute PLLC, practicing in Katy, Texas. Their prescriptions cost Medicare Part D more than their services did: $563,020 for 854 claims, against $247,621 paid for services in 2024. Abbvie Inc. was the largest of 22 companies reporting payments in 2025, $24,971 in all, mostly speaking and faculty fees. Lists Houston Methodist West Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1366440653 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 11, 2005 |
| Last updated in NPPES | Mar 31, 2026 |
| Certified by provider | Mar 31, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | L7210 | 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 - Gastroenterology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 310 |
|---|---|
| Services billed | 11,628 across 32 procedure codes |
| Paid by Medicare | $247,621 |
Part D prescriptions in 2024
| Prescriptions (claims) | 854 · 1,608 30-day fills |
|---|---|
| Patients | 289 |
| Total drug cost | $563,020 |
| Generic share | 78% of claims |
Education and affiliations
| Graduation year | 1997 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Houston Regional Gastroenterology Institute PLLCSugar Land, TX · 40 clinicians
Hospital affiliations
- Houston Methodist West HospitalHouston, TX
- Memorial Hermann - Texas Medical CenterHouston, TX
- Memorial Hermann Katy HospitalKaty, TX
- Memorial Hermann Memorial City HospitalHouston, TX
Other facilities
- Memorial Hermann Rehabilitation Hospital KatyInpatient rehabilitation facility · Katy, TX
Industry payments (Open Payments)
- 2025$24,971 · 130 payments from 22 companies
- 2024$22,864 · 130 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $17,920 | 57 |
| Madrigal Pharmaceuticals | $3,440 | 6 |
| Astrazeneca Pharmaceuticals LP | $1,058 | 1 |
| Lilly USA, LLC | $278.83 | 5 |
| Genzyme Corporation | $269.03 | 6 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$14,250 · 6 payments
- Consulting Fee$4,283 · 2 payments
- Food and Beverage$3,799 · 118 payments
- Travel and Lodging$2,639 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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