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ALLERGY ASSOCIATES OF LA CROSSE
NPI 1194786350
Allergy & Immunology - Allergy in Onalaska, WI

Active since March 29, 2006CLIA 52D0396024 · Certificate of Compliance
2727 MIDWEST DR, ONALASKA, WI 54650(608) 782-2027(608) 782-6172 Get Directions Write a Review

NPPES record last updated: June 28, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Allergy Associates Of La Crosse NPPES

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

ALLERGY ASSOCIATES OF LA CROSSE (NPI 1194786350) is a healthcare organization registered as an allergy in Onalaska, Wisconsin and active in the NPI registry since March 2006. The organization holds a CLIA Certificate of Compliance certificate valid through September 15, 2027 and lists Misty G Piro, Finance & Hr Team Lead, as its authorized official.

NPPES Registry Identity

NPI1194786350
Entity TypeOrganization
Primary Taxonomy207KA0200X
Legal Business NameALLERGY ASSOCIATES HOLDINGS, LTD.
Location Address2727 MIDWEST DROnalaska, WI 54650-6758
Mailing Address2727 Midwest DrOnalaska, WI 54650-6758 · (608) 782-2027 · Fax (608) 782-6172
Phone(608) 782-2027
Fax(608) 782-6172
Organization SubpartNo
Authorized OfficialMisty G PiroFinance & Hr Team Lead · (608) 796-4007
Enumeration DateMarch 29, 2006
Last NPPES UpdateJune 28, 2023
NPPES CertifiedJune 28, 2023
✔ NPI 1194786350 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
2727 MIDWEST DR, Onalaska, WI 54650
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Other Names 1

Doing Business AsAllergy Associates Of La Crosse

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

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 Associates Of La Crosse 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 Associates Of La Crosse, which bills Medicare for the services they deliver. Of these, 4 practice at this address. They are listed nearest first.

Clinicians, nearest first (5)

Meggan Baudek, APNP
Nurse Practitioner
NPI 1912333287
2727 MIDWEST DR.
Onalaska, WI 54650
(608) 782-2827
✔ PECOS✔ Accepts MedicareSame address
Sarah Rudie, APNP
Nurse Practitioner
NPI 1780650952
2727 MIDWEST DR.
Onalaska, WI 54650
(608) 782-2027
✔ PECOS✔ Accepts MedicareSame address
Melinda Schaitel, FNP-C
Nurse Practitioner
NPI 1912436460
2727 MIDWEST DR.
Onalaska, WI 54650
(608) 782-2027
✔ PECOS✔ Accepts MedicareSame address
Demetrios Theodoropoulos, M.D.
Allergy/Immunology
NPI 1326299488
2727 MIDWEST DRIVE
Onalaska, WI 54650
(608) 782-2027
✔ PECOS✔ Accepts MedicareSame address
Giana Nicoara, MD
Allergy/Immunology
NPI 1861413940
5223 PAULSEN ST
Savannah, GA 31405
(912) 303-9355
✔ PECOS✔ Accepts Medicare984 mi

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

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Compliance 52D0396024

Allergy Associates Of La Crosse Ltd · Onalaska, WI
Active · expires Sep 15, 2027
CLIA Number52D0396024
Laboratory TypePhysician Office
Certificate Effective DateSeptember 16, 2025
Certificate Expiration DateSeptember 15, 2027
Laboratory DirectorDr. Demetrios S. Theodoropoulos
Laboratory Phone(608) 782-2027
Laboratory LocationAllergy Associates Of La Crosse Ltd2727 Midwest Dr, Onalaska, WI 54650
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

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 Associates Holdings, Ltd.'s NPI number?

The NPI number for Allergy Associates Holdings, Ltd. is 1194786350. It was assigned to this organization in the NPPES registry on March 29, 2006. The provider is doing business as Allergy Associates Of La Crosse.

Where is Allergy Associates Holdings, Ltd. located?

Allergy Associates Holdings, Ltd. is located at 2727 Midwest Dr, Onalaska, WI 54650. The listed phone number is (608) 782-2027.

What is Allergy Associates Holdings, Ltd.'s specialty?

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

Is Allergy Associates Holdings, Ltd. enrolled in Medicare?

Yes. Allergy Associates Holdings, Ltd. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Allergy Associates Holdings, Ltd.?

According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians in 2 Medicare specialties reassign their Medicare billing to Allergy Associates Holdings, Ltd.. 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) and Allergy/Immunology (2). Of these, 4 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Allergy Associates Holdings, Ltd. hold a CLIA laboratory certificate?

Yes. A Certificate of Compliance (number 52D0396024) is associated with this NPI, valid through September 15, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Allergy Associates Holdings, Ltd. was last updated on June 28, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.