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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ammar Hassan, D.O.

Gastroenterology Physician in Munster, IN · enumerated 2014 · practices at Dalal Medical Corporation.

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

National Provider Identifier

1023428877

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Registry record

Entity type Individual (Type 1)
Name Ammar Hassan
Credential D.O.
Sex Male
Practice address 9410 Calumet Ave Ste 401, Munster, IN, 46321
Phone (219) 922-4900
Fax (219) 836-9922
Enumeration date May 2, 2014
Last updated in NPPES Dec 15, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 02005989A (IN) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036153911 (IL) Secondary
207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 2005989A (IN) Primary
207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 036153911 (IL) Secondary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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.

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Frequently asked questions

Is NPI 1023428877 active?
Yes, as of the latest NPPES snapshot, NPI 1023428877 is active (record last updated 2025-12-15).
How do I verify Ammar Hassan's NPI record?
Cross-check NPI 1023428877 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-15.