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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

DENISE MAHASI
NPI 1770499139
Counselor in Naperville, IL

Active since August 24, 2026
1979 N MILL ST STE 105, NAPERVILLE, IL 60563(630) 281-2496 Get Directions Write a Review

NPPES record added: August 24, 2026. Verified against the NPPES registry weekly; last sync: September 06, 2026.

About Denise Mahasi NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DENISE MAHASI (NPI 1770499139) is an individual counselor in Naperville, Illinois and active in the NPI registry since August 2026.

NPPES Registry Identity

NPI1770499139
Entity TypeIndividualFemale
Primary Taxonomy101Y00000X
Provider Legal NameDENISE MAHASI
Location Address1979 N MILL ST STE 105Naperville, IL 60563-1295
Mailing Address4217 N Patricia CtPeoria, IL 61614-6716 · (309) 857-2097
Phone(630) 281-2496
Sole ProprietorNo
Enumeration DateAugust 24, 2026
NPPES CertifiedAugust 24, 2026
✔ NPI 1770499139 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselorBehavioral Health & Social Service Providers
Taxonomy Code101Y00000X
Definition
A provider who is trained and educated in the performance of behavior health services through interpersonal communications and analysis. Training and education at the specialty level usually requires a master's degree and clinical experience and supervision for licensure or certification.
1979 N MILL ST STE 105, Naperville, IL 60563
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Other Providers at the Same Location NPPES 14

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KARLA CASTELLANOS
Counselor
1979 N MILL ST STE 105
NAPERVILLE, IL 60563
Dupage County (630) 281-2496
KERRY ANNE PRITCHARD LSW
Counselor (Mental Health)
1979 N MILL ST STE 105
NAPERVILLE, IL 60563
Dupage County (630) 281-2496
ERICA HALLMANN
Social Worker (Clinical)
1979 N MILL ST STE 105
NAPERVILLE, IL 60563
Dupage County (630) 281-2496
NAVREET KAUR HENEGHAN
Counselor
1979 N MILL ST STE 105
NAPERVILLE, IL 60563
Dupage County (630) 281-2496
LAURA ADLER
Social Worker (Clinical)
1979 N MILL ST STE 105
NAPERVILLE, IL 60563
Dupage County (630) 281-2496
MARIA ACANDA
Social Worker (Clinical)
1979 N MILL ST STE 105
NAPERVILLE, IL 60563
Dupage County (630) 281-2496
KATELYN R ATAC M.ED.
Counselor
1979 N MILL ST STE 105
NAPERVILLE, IL 60563
Dupage County (630) 281-2496
COUNSELING WORKS
Counselor (Professional)
1979 N MILL ST STE 105
NAPERVILLE, IL 60563
Dupage County (630) 281-2496

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Denise Mahasi's NPI number?

The NPI number for Denise Mahasi is 1770499139. It was assigned to this individual provider in the NPPES registry on August 24, 2026.

Where is Denise Mahasi located?

Denise Mahasi practices at 1979 N Mill St Ste 105, Naperville, IL 60563. The listed phone number is (630) 281-2496.

What is Denise Mahasi's specialty?

The primary specialty registered for this NPI is Counselor with taxonomy code 101Y00000X.

When was this NPI record last updated?

The NPPES record for Denise Mahasi was last updated on August 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.