Marc Antoine Chalaby, M.D.
NPI 1487648291ActiveIndividual· Internal Medicine, Pulmonary Disease· San Antonio, TX
Internal Medicine, Pulmonary Disease (M.D.) in San Antonio, Texas, trained at University of Texas Medical School at San Antonio (class of 1995). Their prescriptions cost Medicare Part D more than their services did: $3,285,349 for 1,461 claims, against $203,298 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 26 companies reporting payments in 2025, $3,650 in all, mostly food and beverage.
Overview
| NPI | 1487648291 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 7, 2005 |
| Last updated in NPPES | Apr 15, 2020 |
| Certified by provider | Apr 15, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | K2320 | TX |
| Internal Medicine | 207R00000X | K2320 | TX |
| Internal Medicine, Critical Care Medicine | 207RC0200X | K2320 | 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 - Pulmonary Disease (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 525 |
|---|---|
| Services billed | 2,701 across 49 procedure codes |
| Paid by Medicare | $203,298 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,461 · 1,800 30-day fills |
|---|---|
| Patients | 188 |
| Total drug cost | $3,285,349 |
| Generic share | 48% of claims |
Education and affiliations
| Medical school | University of Texas Medical School at San Antonio |
|---|---|
| Graduation year | 1995 |
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists) |
| Telehealth | Offers telehealth |
Medical group
- Pulmonary Consultants of San Antonio PASan Antonio, TX · 9 clinicians
Hospital affiliations
- Baptist Medical CenterSan Antonio, TX
- Methodist HospitalSan Antonio, TX
Industry payments (Open Payments)
- 2025$3,650 · 124 payments from 26 companies
- 2024$2,028 · 79 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $744.66 | 32 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $384.56 | 8 |
| Actelion Pharmaceuticals US, Inc. | $344.25 | 6 |
| Insmed, Inc. | $279.82 | 10 |
| Glaxosmithkline, LLC. | $266.91 | 17 |
What the 2025 payments were for
- Food and Beverage$3,481 · 121 payments
- Education$168.64 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Pulmonary Disease providers in San Antonio
- 1932361854
- 1780863746
- 1811299647
- 1821586454
- 1891967287
- 1588843239
- 1841628005
- 1477340925
- 1780883793
- 1124463740
- 1538411962
- 1831496090
All Internal Medicine, Pulmonary Disease providers in Texas →