Dr. Ithaar Derweesh, MD

Dr. Ithaar Derweesh is a Urology Physician provider (Urology) practicing in Chicago, IL, registered in the NPPES registry with NPI 1003873720 since 2006. The credential MD stands for Doctor of Medicine. Practices at Rush University Urology (listed at the same practice address in NPPES).

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NPI	1003873720
Entity type	Individual (Type 1)
Name	Dr. Ithaar Derweesh
Credential	MD
Sex	Male
Practice address	1725 W HARRISON ST STE 970, Chicago, IL, 60612
Phone	3125633447
Fax	3125633721
Enumeration date	2006-04-27
Last updated in NPPES	2026-02-16

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
208800000X	Urology Physician	Primary	036.176621	IL

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
3332625	Medicaid	TN	—

Copy-ready billing details

Provider: Ithaar Derweesh, MD
NPI: 1003873720
Taxonomy: 208800000X (Urology Physician)
Address: 1725 W HARRISON ST STE 970, Chicago, IL, 60612

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1356667224	Sarah Adelstein	Individual	Urogynecology and Reconstructive Pelvic Surgery (Urology) Physician	Chicago, IL
1760794416	Rush University Urology	Organization	Urology Physician	Chicago, IL
1083091227	Peter Reisz	Individual	Urology Physician	Chicago, IL
1043681992	Sarah Armitage	Individual	Urology Physician	Chicago, IL
1477066777	Jake Musashe	Individual	Physician Assistant	Chicago, IL
1225532492	Matthew Collins	Individual	Cardiovascular Disease Physician	Chicago, IL
1356801021	Mukti Patel	Individual	Hematology & Oncology Physician	Chicago, IL
1447711742	Neil Mohile	Individual	Orthopaedic Surgery of the Spine Physician	Chicago, IL

Verify this record

Cross-check NPI 1003873720 against the authoritative CMS record: view Dr. Ithaar Derweesh on the official NPPES registry .

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 or validate an NPI number.

Frequently asked questions

What is the NPI number for Ithaar Derweesh?

The National Provider Identifier (NPI) for Ithaar Derweesh is 1003873720, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ithaar Derweesh practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2026-02-16.