NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Brian Blumenstein, MD

Gastroenterology Physician in Oak Lawn, IL · enumerated 2006.

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

National Provider Identifier

1194784645

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Brian Blumenstein
Credential MD
Sex Male
Practice address 9921 Southwest Hwy, Oak Lawn, IL, 60453
Phone (708) 425-8616
Fax (708) 425-9468
Enumeration date Mar 22, 2006
Last updated in NPPES Jan 15, 2009

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 036082788 (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
IL1223004 Other - MEDICARE PTAN
036082788 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Brian Blumenstein practice?
The practice location on file with NPPES is in Oak Lawn, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Brian Blumenstein?
The National Provider Identifier (NPI) for Brian Blumenstein is 1194784645, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-01-15.