Yazan A. Abdalla, M.D.
NPI 1033365358ActiveIndividual· Internal Medicine, Gastroenterology· Saint Louis, MO
Internal Medicine, Gastroenterology (M.D.) with Mercy Clinic Gastroenterology LLC, practicing in Saint Louis, Missouri. Their prescriptions cost Medicare Part D more than their services did: $466,375 for 1,508 claims, against $57,527 paid for services in 2024. Madrigal Pharmaceuticals was the largest of 2 companies reporting payments in 2025, $135.13 in all, mostly food and beverage. Lists Mercy Hospital South and 1 other hospital as hospital affiliations.
Overview
| NPI | 1033365358 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 18, 2008 |
| Last updated in NPPES | Mar 14, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 2011014220 | MO |
| Internal Medicine | 207R00000X | 2007016056 | MO |
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 - Gastroenterology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 319 |
|---|---|
| Services billed | 504 across 37 procedure codes |
| Paid by Medicare | $57,527 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,508 · 2,372 30-day fills |
|---|---|
| Patients | 727 |
| Total drug cost | $466,375 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Mercy Clinic Gastroenterology LLCWashington, MO · 67 clinicians
Hospital affiliations
- Mercy Hospital SouthSaint Louis, MO
- Mercy Hospital St LouisSaint Louis, MO
Industry payments (Open Payments)
- 2025$135.13 · 2 payments from 2 companies
- 2024$182.40 · 9 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $117.35 | 1 |
| Intercept Pharmaceuticals, Inc. | $17.78 | 1 |
What the 2025 payments were for
- Food and Beverage$135.13 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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