Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Gerald Klompien, MD

Surgery Physician in Oak Lawn, IL · enumerated 2006.

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

National Provider Identifier

1326109232

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Registry record

Entity type Individual (Type 1)

Name Dr. Gerald Klompien

Credential MD

Sex Male

Practice address 4700 W 95th St, Ste 308, Oak Lawn, IL, 60453

Phone (708) 425-6370

Fax (708) 425-6416

Enumeration date Dec 13, 2006

Last updated in NPPES Nov 29, 2007

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 36045856 (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

How do I verify Gerald Klompien's NPI record?

Cross-check NPI 1326109232 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1326109232 active?

Yes, as of the latest NPPES snapshot, NPI 1326109232 is active (record last updated 2007-11-29).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-11-29.