Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mahmoud Mohamad Ali El-Sayed, M.D.

Critical Care Medicine (Internal Medicine) Physician in Ballwin, MO · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1982618856

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Registry record

Entity type Individual (Type 1)

Name Mahmoud Mohamad Ali El-Sayed

Credential M.D.

Sex Male

Practice address 1409 Thomas Mason Pl, Ballwin, MO, 63011

Phone (314) 717-1717

Enumeration date Jul 28, 2006

Last updated in NPPES Dec 21, 2021

Taxonomy & licenses

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 036.114709 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Mahmoud El-Sayed's NPI record?

Cross-check NPI 1982618856 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1982618856 active?

Yes, as of the latest NPPES snapshot, NPI 1982618856 is active (record last updated 2021-12-21).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-21.