WEI AN M.D.
NPI 1942576947
Allergy & Immunology in West Hartford, CT
About Wei An M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WEI AN M.D. (NPI 1942576947) is an individual allergy & immunology provider in West Hartford, Connecticut, licensed in Connecticut (056435) and active in the NPI registry since March 2012. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of University Of Wisconsin School Of Medicine (2012).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Wei An M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Wei An reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
West Hartford, CT 06119
- Reassigned Medicare billing, Connecticut enrollment
- 6 clinicians in this Medicare group
Hartford, CT 06106
- Reassigned Medicare billing, Connecticut enrollment
- 601 clinicians in this Medicare group
New Britain, CT 06052
- Reassigned Medicare billing, Connecticut enrollment
- 745 clinicians in this Medicare group
Meriden, CT 06451
- Reassigned Medicare billing, Connecticut enrollment
- 505 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 11
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WEST HARTFORD, CT 06119
WEST HARTFORD, CT 06119
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 Wei An's NPI number?
The NPI number for Wei An is 1942576947. It was assigned to this individual provider in the NPPES registry on March 24, 2012.
Where is Wei An located?
Wei An practices at 836 Farmington Ave Ste 207, West Hartford, CT 06119. The listed phone number is (860) 232-9911.
What is Wei An's specialty?
The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.
Is Wei An enrolled in Medicare?
Yes. Wei An is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Wei An's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Wei An reassigns Medicare benefits to 4 organizations: Connecticut Asthma & Allergy Center LLC (West Hartford, CT), Connecticut Children's Specialty Group, Inc. (Hartford, CT), The Hospital Of Central Connecticut At New Britain General And Bradley (New Britain, CT) and Midstate Medical Center (Meriden, CT). Each 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 Wei An's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Wei An accept?
Health plans from Anthem Blue Cross and Blue Shield list Wei An 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 Wei An was last updated on April 14, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Wei An, M.D. · NPI 1942576947
Allergy & Immunology physician in West Hartford, Connecticut. Individual provider, active in the CMS NPPES registry since March 24, 2012.
## Identity
- **NPI:** 1942576947 (Entity type: Individual)
- **Enumerated:** March 24, 2012
- **Primary specialty:** Allergy & Immunology · taxonomy 207K00000X
- **State license:** 056435 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 836 FARMINGTON AVE STE 207, West Hartford, CT 06119-1544
- **Phone:** (860) 232-9911
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Connecticut Asthma & Allergy Center LLC (NPI 1386604270, West Hartford, CT); Connecticut Children's Specialty Group, Inc. (NPI 1669448882, Hartford, CT); The Hospital Of Central Connecticut At New Britain General And Bradley (NPI 1063461481, New Britain, CT); Midstate Medical Center (NPI 1154425288, Meriden, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Wisconsin School Of Medicine, class of 2012
## Record status
- **NPPES last updated:** April 14, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1942576947) · Data from the CMS NPPES public registry.