Wei An, M.D.
NPI 1942576947ActiveIndividual· Allergy & Immunology· West Hartford, CT
Allergy & Immunology (M.D.) in West Hartford, Connecticut, trained at University of Wisconsin School of Medicine (class of 2012). Their prescriptions cost Medicare Part D more than their services did: $1,015,132 for 1,509 claims, against $39,923 paid for services in 2024. Glaxosmithkline, LLC. was the largest of 16 companies reporting payments in 2025, $2,341 in all, mostly food and beverage.
Overview
| NPI | 1942576947 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 24, 2012 |
| Last updated in NPPES | Apr 14, 2022 |
| Certified by provider | Apr 14, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | 056435 | CT |
| Internal Medicine | 207R00000X | 056435 | CT |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Allergy/Immunology (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 168 |
|---|---|
| Services billed | 3,710 across 21 procedure codes |
| Paid by Medicare | $39,923 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,509 · 2,470 30-day fills |
|---|---|
| Patients | 296 |
| Total drug cost | $1,015,132 |
| Generic share | 59% of claims |
Education and affiliations
| Medical school | University of Wisconsin School of Medicine |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Allergy/Immunology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Connecticut Asthma and Allergy Center LLCWest Hartford, CT · 8 clinicians
Industry payments (Open Payments)
- 2025$2,341 · 107 payments from 16 companies
- 2024$1,195 · 67 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $770.74 | 47 |
| Astrazeneca Pharmaceuticals LP | $259.98 | 13 |
| Genzyme Corporation | $250.06 | 6 |
| Leo Pharma Inc. | $204.54 | 5 |
| Takeda Pharmaceuticals U.S.A., Inc. | $122.96 | 5 |
What the 2025 payments were for
- Food and Beverage$2,341 · 107 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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