Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Saeed Arefanian, MD

Surgery Physician in Chicago, IL · enumerated 2016.

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

National Provider Identifier

1821441643

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Registry record

Entity type Individual (Type 1)

Name Saeed Arefanian

Credential MD

Sex Male

Practice address 200 W Superior St Ste 300, Chicago, IL, 60654

Phone (733) 276-8007

Fax (773) 327-6877

Enumeration date Jul 16, 2016

Last updated in NPPES Jun 17, 2026

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 036.175054 (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

Is NPI 1821441643 active?

Yes, as of the latest NPPES snapshot, NPI 1821441643 is active (record last updated 2026-06-17).

How do I verify Saeed Arefanian's NPI record?

Cross-check NPI 1821441643 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-17.