Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Athir J Hajjar, M.D.

Pulmonary Disease Physician in El Cajon, CA · enumerated 2006 · practices at Lung Sleep & Medicine Institute A Professional Medical Corporation.

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

National Provider Identifier

1164476362

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Registry record

Entity type Individual (Type 1)

Name Athir J Hajjar

Credential M.D.

Sex Male

Practice address 671 S Mollison Ave, Suite B & C, El Cajon, CA, 92020

Phone (619) 841-8148

Fax (844) 350-9978

Enumeration date May 20, 2006

Last updated in NPPES Oct 15, 2022

Taxonomy & licenses

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 036114867 (IL) Primary

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 036114867 (IL) Secondary

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License CV2200566 (IN) Secondary

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

Other identifiers

Identifier	Type	State	Issuer
036114867	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

What specialty is Athir Hajjar?

Athir Hajjar is registered in NPPES with the primary taxonomy of Pulmonary Disease Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Lung Sleep & Medicine Institute A Professional Medical Corporation Pulmonary Disease Physician · El Cajon, CA NPI 1265970362

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-10-15.