Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mahmoud Mohamad Ali El-Sayed, MD

Individual provider Critical Care Medicine (Internal Medicine) Physician · NPI 1982618856

Mahmoud Mohamad Ali El-Sayed, MD is a Critical Care (Intensivists) in Ballwin, Missouri. Qualified in 1999, 27 years ago. Practices with Cep America Illinois Intensivists, a 48-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
27
Licensed in
IL
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

1409 Thomas Mason Pl
Ballwin, MO 63011-4423
Phone: (314) 717-1717
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Critical Care Medicine (Internal Medicine) Physician (primary) Taxonomy 207RC0200X · Licence 036.114709 (IL)

Record details

NPI number1982618856
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 28, 2006
Last updated in NPPESDecember 21, 2021
Certification dateDecember 21, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCRITICAL CARE (INTENSIVISTS)
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1999 (27 years in practice)
Group practice Cep America Illinois Intensivists — 48 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare