Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Azizur Rahman Arain, M.D

Q: What is the NPI number for Azizur Arain?

The National Provider Identifier (NPI) for Azizur Arain is 1134493315, a Type 1 (individual) record in the CMS NPPES registry.

Internal Medicine Physician in Oak Brook, IL · enumerated 2012.

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

National Provider Identifier

1134493315

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Registry record

Entity type Individual (Type 1)

Name Azizur Rahman Arain

Credential M.D

Sex Male

Practice address Oak Brook, IL, 60523

Phone (630) 654-8745

Fax (630) 654-8745

Enumeration date Mar 6, 2012

Last updated in NPPES Mar 6, 2012

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036-045141 (IL) Primary

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

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Azizur Arain practice?

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

What is the NPI number for Azizur Arain?

The National Provider Identifier (NPI) for Azizur Arain is 1134493315, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-03-06.