ALLERGY, ASTHMA & SINUS CENTER, S.C.
NPI 1265546303
Specialist in Greenfield, WI
About Allergy, Asthma & Sinus Center, S.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALLERGY, ASTHMA & SINUS CENTER, S.C. (NPI 1265546303) is a healthcare organization registered as a specialist in Greenfield, Wisconsin and active in the NPI registry since August 2006. The organization holds a CLIA Waiver certificate valid through March 30, 2027 and lists Gary C. Steven, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Group Practice 1
Accepted 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, Asthma & Sinus Center, S.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
3Medicare enrollment records show 3 clinicians reassign Medicare billing to Allergy, Asthma & Sinus Center, S.C., which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.
Clinicians, nearest first (3)
Greenfield, WI 53228
Greenfield, WI 53228
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 Waiver 52D1011043
Allergy, Asthma & Sinus Center, Sc · Greenfield, WIFrequently 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, Asthma & Sinus Center, S.C.'s NPI number?
The NPI number for Allergy, Asthma & Sinus Center, S.C. is 1265546303. It was assigned to this organization in the NPPES registry on August 18, 2006.
Where is Allergy, Asthma & Sinus Center, S.C. located?
Allergy, Asthma & Sinus Center, S.C. is located at 8585 W Forest Home Ave Suite 200, Greenfield, WI 53228. The listed phone number is (414) 529-8500.
What is Allergy, Asthma & Sinus Center, S.C.'s specialty?
The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.
Is Allergy, Asthma & Sinus Center, S.C. enrolled in Medicare?
Yes. Allergy, Asthma & Sinus Center, S.C. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Allergy, Asthma & Sinus Center, S.C.?
According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians reassign their Medicare billing to Allergy, Asthma & Sinus Center, S.C., in Allergy/Immunology and Nurse Practitioner. 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. Of these, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Allergy, Asthma & Sinus Center, S.C. hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 52D1011043) is associated with this NPI, valid through March 30, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
What insurance does Allergy, Asthma & Sinus Center, S.C. accept?
Health plans from Anthem Blue Cross and Blue Shield, CareSource (Common Ground Healthcare), Dean Health Plan and Quartz list Allergy, Asthma & Sinus Center, S.C. 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, Asthma & Sinus Center, S.C. was last updated on September 17, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Allergy, Asthma & Sinus Center, S.c. · NPI 1265546303
Specialist organization in Greenfield, Wisconsin. Organization record, active in the CMS NPPES registry since August 18, 2006.
## Identity
- **NPI:** 1265546303 (Entity type: Organization)
- **Enumerated:** August 18, 2006
- **Primary specialty:** Specialist · taxonomy 174400000X
- **Organization subpart:** No
- **Authorized official:** Gary Steven, OWNER
## Practice location
- **Address:** 8585 W FOREST HOME AVE, SUITE 200, Greenfield, WI 53228-3417
- **Phone:** (414) 529-8500 · **Fax:** (414) 529-8511
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 3 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Allergy/Immunology (2), Nurse Practitioner (1); 2 practice at this address · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 17, 2009
- **Other identifiers:** Medicare UPIN G32673 (WI)
- **CLIA laboratory certificates:** 1 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1265546303) · Data from the CMS NPPES public registry.