Gemma D. Callahan

Behavior Analyst · Warrenville, IL

Individual Active NPI

NPI number 1598691065

Practice location

27555 Diehl Rd
Warrenville, IL 60555-3849
Phone
(630) 281-1815

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NPI record

NPI
1598691065
Entity type
Individual (Type 1)
Enumeration date
June 22, 2026
Last updated
June 22, 2026
Certified
June 22, 2026
Sole proprietor
No

Specialties & taxonomy codes

TaxonomyCodeLicenseState
Behavior Analyst Primary 103K00000X 152.000987 IL

About Gemma Callahan

Gemma D. Callahan is a healthcare provider registered in the NPI registry with the primary taxonomy Behavior Analyst (code 103K00000X). The practice location is 27555 Diehl Rd, Warrenville, IL 60555-3849. The NPI number 1598691065 was assigned on June 22, 2026 and the record was last updated on June 22, 2026.

Gemma Callahan lists a license in the registry: #152.000987 (IL) for Behavior Analyst. License numbers are self-reported to NPPES; verify them with the state licensing board.

Frequently asked questions

What is the NPI number of Gemma D. Callahan?

The NPI number is 1598691065.

What is the phone number of Gemma Callahan?

The phone number listed for the practice location is (630) 281-1815.

Where is Gemma Callahan located?

27555 Diehl Rd, Warrenville, IL 60555-3849.

What is the taxonomy code for Gemma Callahan?

The primary taxonomy code is 103K00000X – Behavior Analyst.

Is this information correct?

All details come from the public NPPES registry. Providers can update their record at nppes.cms.hhs.gov; changes appear here after the next weekly update.

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