Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Glenn F Carlson Jr., MD

Internal Medicine Physician in La Grange Park, IL · enumerated 2025.

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

National Provider Identifier

1225913429

Verified

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Registry record

Entity type Individual (Type 1)

Name Glenn F Carlson Jr.

Credential MD

Sex Male

Practice address La Grange Park, IL, 60526

Phone (610) 563-7515

Enumeration date Aug 7, 2025

Last updated in NPPES Aug 7, 2025

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036.073913 (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

Where does Glenn Carlson practice?

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

What is the NPI number for Glenn Carlson?

The National Provider Identifier (NPI) for Glenn Carlson is 1225913429, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-07.