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ALLERGY & IMMUNOLOGY SPECIALISTS, PLLC
NPI 1265996102
Allergy & Immunology - Allergy in Litchfield Park, AZ

Active since January 24, 2019
13575 W INDIAN SCHOOL RD STE 200, LITCHFIELD PARK, AZ 85340(623) 512-4310(623) 512-4311 Get Directions Write a Review

NPPES record last updated: June 18, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 18, 2024, Aug 11, 2021, Feb 6, 2019 and 1 more (4 updates tracked since 2019).

About Allergy & Immunology Specialists, Pllc NPPES

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

ALLERGY & IMMUNOLOGY SPECIALISTS, PLLC (NPI 1265996102) is a healthcare organization registered as an allergy in Litchfield Park, Arizona and active in the NPI registry since January 2019. The organization lists Connie Hsu, Ceo, as its authorized official.

NPPES Registry Identity

NPI1265996102
Entity TypeOrganization
Primary Taxonomy207KA0200X
Legal Business NameALLERGY & IMMUNOLOGY SPECIALISTS, LLC
Location Address13575 W INDIAN SCHOOL RD STE 200Litchfield Park, AZ 85340-4906
Mailing Address13575 W Indian School Rd Ste 200Litchfield Park, AZ 85340-4906 · (623) 512-4310 · Fax (623) 321-6322
Phone(623) 512-4310
Fax(623) 512-4311
Organization SubpartNo
Authorized OfficialConnie HsuCeo · (623) 512-4310
Enumeration DateJanuary 24, 2019
Last NPPES UpdateJune 18, 20244 updates tracked since enumeration
NPPES CertifiedJune 18, 2024
✔ NPI 1265996102 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & Immunology · AllergyAllopathic & Osteopathic Physicians
Taxonomy Code207KA0200X
Definition
A physician who specializes in the diagnosis, treatment, and management of allergies. Source: National Uniform Claim Committee
13575 W INDIAN SCHOOL RD STE 200, Litchfield Park, AZ 85340
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Other Names 1

Doing Business AsAllergy & Immunology Specialists, Pllc

Other Identifiers 1

Other207K00000XAZ · Taxonomy Code

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Cigna HealthCare of Arizona, Inc.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Allergy & Immunology Specialists, Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

5

Medicare enrollment records show 5 clinicians reassign Medicare billing to Allergy & Immunology Specialists, PLLC, which bills Medicare for the services they deliver. Of these, 2 practice at this address and 4 within 10 miles. They are listed nearest first.

Clinicians, nearest first (5)

Connie Hsu, MD
Allergy/Immunology
NPI 1619916004
13575 W INDIAN SCHOOL RD STE 200
Litchfield Park, AZ 85340
(623) 512-4310
✔ PECOS✔ Accepts MedicareSame address
Dana Mather, FNP-C
Nurse Practitioner
NPI 1689794257
13575 W. INDIAN SCHOOL ROAD SUITE 200
Litchfield Park, AZ 85340
(623) 512-4310
✔ PECOS✔ Accepts MedicareSame address
Holly Valdez
Nurse Practitioner
NPI 1396441762
18911 W SIERRA ST
Surprise, AZ 85388
(602) 469-6875
✔ PECOS✔ Accepts Medicare8.0 mi
Alina Stanca, FNP
Nurse Practitioner
NPI 1720381163
12428 W THUNDERBIRD RD EL MIRAGE FAMILY HEALTH CENTER
El Mirage, AZ 85335
(623) 344-6500
✔ PECOS✔ Accepts Medicare8.6 mi
Reimus Valencia, DO
Internal Medicine
NPI 1346690518
6970 E CHAUNCEY LN STE 100
Phoenix, AZ 85054
(602) 788-7211
✔ PECOS✔ Accepts Medicare27 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Allergy & Immunology Specialists, LLC's NPI number?

The NPI number for Allergy & Immunology Specialists, LLC is 1265996102. It was assigned to this organization in the NPPES registry on January 24, 2019. The provider is doing business as Allergy & Immunology Specialists, PLLC.

Where is Allergy & Immunology Specialists, LLC located?

Allergy & Immunology Specialists, LLC is located at 13575 W Indian School Rd Ste 200, Litchfield Park, AZ 85340. The listed phone number is (623) 512-4310.

What is Allergy & Immunology Specialists, LLC's specialty?

The primary specialty registered for this NPI is Allergy & Immunology, specializing in Allergy, with taxonomy code 207KA0200X.

Is Allergy & Immunology Specialists, LLC enrolled in Medicare?

Yes. Allergy & Immunology Specialists, LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Allergy & Immunology Specialists, LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians in 3 Medicare specialties reassign their Medicare billing to Allergy & Immunology Specialists, LLC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Nurse Practitioner (3), Allergy/Immunology (1) and Internal Medicine (1). Of these, 2 practice at this address and 4 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Allergy & Immunology Specialists, LLC accept?

Health plans from Ambetter from Arizona Complete Health and Cigna HealthCare of Arizona, Inc list Allergy & Immunology Specialists, LLC 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 Allergy & Immunology Specialists, LLC was last updated on June 18, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.