Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alan Mark Auerbach, M.D.

Gastroenterology Physician in Buffalo Grove, IL · enumerated 2006.

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

National Provider Identifier

1902913759

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Registry record

Entity type Individual (Type 1)

Name Alan Mark Auerbach

Credential M.D.

Sex Male

Practice address 720 Horatio Blvd, Buffalo Grove, IL, 60089

Phone (847) 508-1509

Fax (847) 459-8968

Enumeration date Aug 25, 2006

Last updated in NPPES Sep 6, 2024

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 01065184A (IN) Secondary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 036059072 (IL) Primary

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
0031600714	Other	IL	BLUE CROSS/
036059072	Medicaid	IL	-
200904620	Medicaid	IN	-

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

Where does Alan Auerbach practice?

The practice location on file with NPPES is in Buffalo Grove, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Alan Auerbach?

The National Provider Identifier (NPI) for Alan Auerbach is 1902913759, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-09-06.