Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ahmad Syed Hussain, M.D.

Vascular Surgery Physician in Covina, CA · enumerated 2009 · practices at Ahmad Hussain MD Inc..

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

National Provider Identifier

1598999823

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Registry record

Entity type Individual (Type 1)

Name Dr. Ahmad Syed Hussain

Credential M.D.

Sex Male

Practice address 315 N 3rd Ave Ste 300, Covina, CA, 91723

Phone (626) 337-3500

Enumeration date May 14, 2009

Last updated in NPPES Jan 3, 2024

Taxonomy & licenses

2086S0129X Vascular Surgery Physician Allopathic & Osteopathic Physicians · License 142881 (CA) 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

Is NPI 1598999823 active?

Yes, as of the latest NPPES snapshot, NPI 1598999823 is active (record last updated 2024-01-03).

How do I verify Ahmad Hussain's NPI record?

Cross-check NPI 1598999823 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Ahmad Hussain MD Inc. Medical Specialty Clinic/Center · Covina, CA NPI 1336954015

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-03.