Husam I. Issa, MD
NPI 1821064304ActiveIndividual· Internal Medicine, Infectious Disease· Webster, TX
Internal Medicine, Infectious Disease (MD) with Cls Health PLLC and 1 other group, practicing in Webster, Texas. Their prescriptions cost Medicare Part D more than their services did: $775,768 for 659 claims, against $320,560 paid for services in 2024. Abbvie Inc. was the largest of 5 companies reporting payments in 2025, $7,500 in all, mostly speaking and faculty fees. Lists HCA Houston Healthcare Clear Lake and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1821064304 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Feb 24, 2006 |
| Last updated in NPPES | Oct 19, 2026 |
| Certified by provider | Oct 19, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | N0849 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Infectious Disease (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 496 |
|---|---|
| Services billed | 144,011 across 51 procedure codes |
| Paid by Medicare | $320,560 |
Part D prescriptions in 2024
| Prescriptions (claims) | 659 · 877 30-day fills |
|---|---|
| Patients | 179 |
| Total drug cost | $775,768 |
| Generic share | 69% of claims |
Education and affiliations
| Graduation year | 1995 |
|---|---|
| Medicare specialty | Infectious Disease |
| Secondary specialties | Internal Medicine |
Medical groups
- Cls Health PLLCWebster, TX · 180 clinicians
- Infectious Diseases Clinic at Clear Lake Specialties PLLCWebster, TX · 8 clinicians
Hospital affiliations
- HCA Houston Healthcare Clear LakeWebster, TX
- Houston Methodist Clear Lake HospitalNassau Bay, TX
- Memorial Hermann Hospital SystemHouston, TX
Industry payments (Open Payments)
- 2025$7,500 · 21 payments from 5 companies
- 2024$6,290 · 16 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $7,172 | 13 |
| Gilead Sciences, Inc. | $223.01 | 4 |
| Exelixis Inc. | $43.04 | 1 |
| Viiv Healthcare Company | $41.77 | 2 |
| Napo Pharmaceuticals Inc | $21.13 | 1 |
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$5,850 · 3 payments
- Food and Beverage$825.93 · 16 payments
- Travel and Lodging$824.54 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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