Sumbul Islam, M.D.
NPI 1992898860ActiveIndividual· Internal Medicine· Sherman, TX
Internal Medicine (M.D.) with Legacy Healthcare Services Inc and 1 other group, practicing in Sherman, Texas. Their prescriptions cost Medicare Part D more than their services did: $1,217,781 for 14,859 claims, against $110,141 paid for services in 2024. Abbvie Inc. was the largest of 13 companies reporting payments in 2025, $666.58 in all, mostly food and beverage. Lists Baylor Scott and White Surgical Hospital at Sherma and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1992898860 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 2, 2006 |
| Last updated in NPPES | Mar 4, 2020 |
| Certified by provider | Mar 4, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | R4240 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 279 |
|---|---|
| Services billed | 2,414 across 34 procedure codes |
| Paid by Medicare | $110,141 |
Part D prescriptions in 2024
| Prescriptions (claims) | 14,859 · 27,238 30-day fills |
|---|---|
| Patients | 634 |
| Total drug cost | $1,217,781 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1994 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Legacy Healthcare Services IncGreenville, SC · 3,223 clinicians
- Visiting Doctors, PLLCSherman, TX · 2 clinicians
Hospital affiliations
- Baylor Scott and White Surgical Hospital at ShermaSherman, TX
- Texoma Medical CenterDenison, TX
- Wilson N Jones Regional Medical CenterSherman, TX
Other facilities
- First Texas Home HealthHome health agency · Whitesboro, TX
- Pilot Point Home Health IncHome health agency · Whitesboro, TX
- Remarkable Home HealthHome health agency · Sherman, TX
- Renew Home HealthHome health agency · Sherman, TX
- Tmc Home HealthHome health agency · Sherman, TX
- VnaHospice · Dallas, TX
Industry payments (Open Payments)
- 2025$666.58 · 44 payments from 13 companies
- 2024$937.77 · 71 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $149.46 | 11 |
| Novo Nordisk Inc | $105.89 | 6 |
| Glaxosmithkline, LLC. | $95.94 | 5 |
| Pfizer Inc. | $56.30 | 3 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $50.70 | 3 |
What the 2025 payments were for
- Food and Beverage$666.58 · 44 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine providers in Sherman
- 1356698500
- 1871314062
- 1932205572
- 1902483548
- 1922103399
- 1376014076
- 1225875925
- 1366236531
- 1891562856
- 1558169300
- 1649428004
- 1689946527