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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. HOLLY IRIS WILLIAMSON LISAC
NPI 1033942438
Counselor - Addiction (Substance Use Disorder) in Phoenix, AZ

Active since August 21, 2024
3864 N 27TH AVE, PHOENIX, AZ 85017(602) 685-6000(602) 212-6250 Get Directions Write a Review

NPPES record last updated: July 15, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 15, 2026, Aug 21, 2024 (2 updates tracked since 2024).

About Dr. Holly Iris Williamson Lisac NPPES

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

DR. HOLLY IRIS WILLIAMSON LISAC (NPI 1033942438) is an individual addiction (substance use disorder) provider in Phoenix, Arizona, licensed in Arizona (11735) and active in the NPI registry since August 2024.

NPPES Registry Identity

NPI1033942438
Entity TypeIndividualFemale
Primary Taxonomy101YA0400X
Provider Legal NameDR. HOLLY IRIS WILLIAMSONCredential: LISAC
Location Address3864 N 27TH AVEPhoenix, AZ 85017-4703
Mailing Address3864 N 27th AvePhoenix, AZ 85017-4703 · (602) 685-6000 · Fax (602) 212-6250
Phone(602) 685-6000
Fax(602) 212-6250
Sole ProprietorNo
Enumeration DateAugust 21, 2024
Last NPPES UpdateJuly 15, 20262 updates tracked since enumeration
NPPES CertifiedJuly 15, 2026
✔ NPI 1033942438 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code101YA0400X
License✔ Licensed in AZ · 11735
3864 N 27TH AVE, Phoenix, AZ 85017
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona.Insurance ›

Other Providers at the Same Location NPPES 20

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

JASMINE CANDELARIA LOPEZ LCSW
Social Worker (Clinical)
3864 N 27TH AVE
PHOENIX, AZ 85017
Maricopa County (602) 685-6000
LYNNE COCKRUM-MURPHY LISAC
Counselor (Addiction (Substance Use Disorder))
3864 N 27TH AVE
PHOENIX, AZ 85017
Maricopa County (602) 685-6000
MICHAEL SCHEMBER RPH
Pharmacist
3864 N 27TH AVE
PHOENIX, AZ 85017
Maricopa County (602) 358-0078
MRS. MARGARETT JANE FUGATE LCSW
Social Worker (Clinical)
3864 N 27TH AVE
PHOENIX, AZ 85017
Maricopa County (602) 685-6000
DR. KAREN MICHELLE MORROW LPC, PHD
Counselor (Mental Health)
3864 N 27TH AVE
PHOENIX, AZ 85017
Maricopa County (602) 685-6000
CHRISTINE QUEVAL-CHUNG FNP-BC
Nurse Practitioner (Family)
3864 N 27TH AVE
PHOENIX, AZ 85017
Maricopa County (602) 685-6000
CLEOPATRA C PARK N.P.
Nurse Practitioner (Pediatrics)
3864 N 27TH AVE
PHOENIX, AZ 85017
Maricopa County (602) 685-6000
PERLA JAZMINE BAUTISTA ROMAN
Social Worker (Clinical)
3864 N 27TH AVE
PHOENIX, AZ 85017
Maricopa County (602) 685-6000

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 Holly Williamson's NPI number?

The NPI number for Holly Williamson is 1033942438. It was assigned to this individual provider in the NPPES registry on August 21, 2024.

Where is Holly Williamson located?

Holly Williamson practices at 3864 N 27th Ave, Phoenix, AZ 85017. The listed phone number is (602) 685-6000.

What is Holly Williamson's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

What insurance does Holly Williamson accept?

Health plans from Blue Cross Blue Shield of Arizona list Holly Williamson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Holly Williamson was last updated on July 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 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.