Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Louisa K Gehlmann MD Sc

Dermatology Physician in Oak Brook, IL · enumerated 2005 · authorized official Louisa Gehlmann, Owner.

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

National Provider Identifier

1215924212

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Louisa K Gehlmann MD Sc

Practice address 120 Oak Brook Center Mall, Ste 410, Oak Brook, IL, 60523

Phone (630) 574-5860

Fax (630) 574-5866

Enumeration date Oct 4, 2005

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Louisa Gehlmann

Title Owner

Phone (630) 574-5860

Other identifiers

Identifier	Type	State	Issuer
0360505141	Medicaid	IL	-

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 is Louisa K Gehlmann MD Sc located?

The practice location on file with NPPES is in Oak Brook, IL.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2020-08-22. Verify at npiregistry.cms.hhs.gov.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.