Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Carmen Gnatenco M.D., S.C.

Q: What is the NPI number for Carmen Gnatenco M.D., S.C.?

The NPI for Carmen Gnatenco M.D., S.C. is 1871750711, a Type 2 (organization) record in the CMS NPPES registry.

Internal Medicine Physician in Palos Heights, IL · enumerated 2008 · authorized official Julian Gnatenco, Billing Manager.

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

National Provider Identifier

1871750711

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Registry record

Entity type Organization (Type 2)

Legal business name Carmen Gnatenco M.D., S.C.

Practice address 12211 S Harlem Ave Ste 2s, Palos Heights, IL, 60463

Phone (708) 295-9399

Fax (866) 920-1134

Enumeration date May 19, 2008

Last updated in NPPES Sep 22, 2026

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Julian Gnatenco

Title Billing Manager

Phone (773) 742-8926

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

Who is the authorized official for Carmen Gnatenco M.D., S.C.?

NPPES lists Julian Gnatenco (Billing Manager) as the authorized official for this organization.

What is the NPI number for Carmen Gnatenco M.D., S.C.?

The NPI for Carmen Gnatenco M.D., S.C. is 1871750711, a Type 2 (organization) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-09-22.