Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marius J Katilius, MD

Surgery Physician in Joliet, IL · enumerated 2006 · practices at Surgical Consultants of Joliet, Ltd.

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

National Provider Identifier

1659346583

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Registry record

Entity type Individual (Type 1)

Name Marius J Katilius

Credential MD

Sex Male

Practice address 2 Uno Cir, Joliet, IL, 60435

Phone (815) 725-2277

Enumeration date Feb 22, 2006

Last updated in NPPES Apr 7, 2025

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 036102938 (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
9930030	Other	IL	BCBS OF ILLINOIS
036102938	Medicaid	IL	-
66708	Other	IL	HEALTH ALLIANCE, URBANA
7943189	Other	IL	AETNA

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.

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Frequently asked questions

Is NPI 1659346583 active?

Yes, as of the latest NPPES snapshot, NPI 1659346583 is active (record last updated 2025-04-07).

How do I verify Marius Katilius's NPI record?

Cross-check NPI 1659346583 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 2025-04-07.