Allergy, Asthma & Sinus Center, S.c.
NPI 1265546303 · Specialist · Greenfield, WI
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allergy, Asthma & Sinus Center, S.c. is a Specialist organization in Greenfield, WI (NPI 1265546303).
Provider details
- NPI number
- 1265546303
- Entity type
- Organization
- Primary specialty
- SpecialistOther Service Providers
- Organization subpart
- No
- Authorized official
- Gary Steven, Owner(414) 529-8500
- License
- 33574020 (WI)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-18
- Last updated
- 2009-09-17
Frequently asked questions
- What is Allergy, Asthma & Sinus Center, S.c.'s NPI number?
- Allergy, Asthma & Sinus Center, S.c.'s National Provider Identifier (NPI) is 1265546303, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Allergy, Asthma & Sinus Center, S.c.?
- Allergy, Asthma & Sinus Center, S.c. is classified in the NPPES registry as Specialist (Other Service Providers).
- Where is Allergy, Asthma & Sinus Center, S.c. located?
- Allergy, Asthma & Sinus Center, S.c.'s practice location on file with NPPES is 8585 W Forest Home Ave, Greenfield, WI 53228-3417.
- What is Allergy, Asthma & Sinus Center, S.c.'s phone number?
- The practice phone number listed in the NPPES registry for Allergy, Asthma & Sinus Center, S.c. is (414) 529-8500.
- Does Allergy, Asthma & Sinus Center, S.c. accept Medicare?
- Allergy, Asthma & Sinus Center, S.c. is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Allergy, Asthma & Sinus Center, S.c.?
- The authorized official listed on Allergy, Asthma & Sinus Center, S.c.'s NPPES record is Gary Steven, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Allergy, Asthma & Sinus Center, S.c.'s NPI active?
- Yes — Allergy, Asthma & Sinus Center, S.c.'s NPI (1265546303) is active in the NPPES registry as of the last update on 2009-09-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.