Malek Ayoub, MD
NPI 1609510981 · Gastroenterology Physician · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Malek Ayoub, MD is a Gastroenterology Physician provider in Chicago, IL (NPI 1609510981).
Provider details
- NPI number
- 1609510981
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2022019854 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
4 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 53 | — |
| Amlodipine Besylate | 53 | 16 |
| Atorvastatin Calcium | 31 | 12 |
| Losartan Potassium | 29 | — |
| Finasteride | 25 | — |
| Pantoprazole Sodium | 24 | — |
Practice location
Mailing address
Additional practice locations (1)
- 1 Barnes Jewish Hospital PlzSaint Louis, MO 63110-1003Phone: (314) 362-8061
Registry dates
- Enumerated
- 2022-04-23
- Last updated
- 2025-05-17
- Certified
- 2025-05-17
Frequently asked questions
- What is Malek Ayoub's NPI number?
- Malek Ayoub's National Provider Identifier (NPI) is 1609510981, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Malek Ayoub's specialty?
- Malek Ayoub is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Malek Ayoub located?
- Malek Ayoub's practice location on file with NPPES is 5841 S Maryland Ave # Mc4076, Chicago, IL 60637-1443.
- What is Malek Ayoub's phone number?
- The practice phone number listed in the NPPES registry for Malek Ayoub is (773) 795-1824.
- Does Malek Ayoub accept Medicare?
- Malek Ayoub is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Malek Ayoub's NPI active?
- Yes — Malek Ayoub's NPI (1609510981) is active in the NPPES registry as of the last update on 2025-05-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.