Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Louis Ancona, PA

Physician Assistant in Oak Lawn, IL · enumerated 2005.

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

National Provider Identifier

1003891649

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Registry record

Entity type Individual (Type 1)

Name John Louis Ancona

Credential PA

Sex Male

Practice address 4400 W 95th St, Suite 205, Oak Lawn, IL, 60453

Phone (630) 977-9764

Fax (708) 346-3287

Enumeration date Dec 7, 2005

Last updated in NPPES Aug 19, 2015

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 085000886 (IL) Primary

PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program. About the PA 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 1003891649 active?

Yes, as of the latest NPPES snapshot, NPI 1003891649 is active (record last updated 2015-08-19).

How do I verify John Ancona's NPI record?

Cross-check NPI 1003891649 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 2015-08-19.