Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

G N Endocrinology Ltd

Endocrinology, Diabetes & Metabolism Physician in Dekalb, IL · enumerated 2010 · authorized official Amer Kassar, Owner, MD.

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

National Provider Identifier

1285957266

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Registry record

Entity type Organization (Type 2)

Legal business name G N Endocrinology Ltd

Practice address Five Kish Hospital Dr, Suite 201, Dekalb, IL, 60115

Phone (815) 748-8335

Fax (815) 748-8340

Enumeration date Mar 5, 2010

Last updated in NPPES Oct 10, 2018

Taxonomy & classification

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License 036124942 (IL) Primary

Authorized official

Name Amer Kassar

Title Owner, MD

Phone (219) 440-5350

Other identifiers

Identifier	Type	State	Issuer
044049488	Medicaid	IL	-

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

Where is G N Endocrinology Ltd located?

The practice location on file with NPPES is in Dekalb, IL.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2018-10-10. Verify at npiregistry.cms.hhs.gov.

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Amer Kassar Endocrinology, Diabetes & Metabolism Physician · Dekalb, IL NPI 1932208063

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-10-10.