Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Behfar Dianati, M.D.

Hospitalist Physician in Belleville, IL · enumerated 2007.

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

National Provider Identifier

1558580852

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Registry record

Entity type Individual (Type 1)

Name Behfar Dianati

Credential M.D.

Sex Male

Practice address 4550 Memorial Dr, Ste. 340, Belleville, IL, 62226

Phone (618) 257-6200

Fax (618) 257-6679

Enumeration date Apr 25, 2007

Last updated in NPPES May 27, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036124202 (IL) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 036124202 (IL) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 2007018749 (MO) 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
036124202	Other	IL	STATE LICENSE
1558580852	Medicaid	IL	-
207340605	Medicaid	MO	-

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

What is the NPI number for Behfar Dianati?

The National Provider Identifier (NPI) for Behfar Dianati is 1558580852, a Type 1 (individual) record in the CMS NPPES registry.

Where does Behfar Dianati practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-27.