Wei an, M.D.
NPI 1942576947 · Allergy & Immunology Physician · West Hartford, CT
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wei an, M.D. is a Allergy & Immunology Physician provider in West Hartford, CT (NPI 1942576947).
Provider details
- NPI number
- 1942576947
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 056435 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
3,560 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Test for Allergy Using Allergenic Extract95004 | 2,563 | $4 |
| Professional Service for Preparation and Provision of 1 Or More Antigens95165 | 318 | $16 |
| Professional Service for Single Injection of Allergen95115 | 131 | $11 |
| Test for Allergy Using Combination of Methods With Drug Or Biological95018 | 129 | $21 |
| Professional Service for Multiple Injections of Allergen95117 | 107 | $13 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 88 | $130 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Montelukast Sodium | 152 | 55 |
| Ipratropium Bromide | 144 | 60 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 135 | 58 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 119 | 43 |
| Omalizumabbrand: Xolair | 102 | 11 |
| Azelastine/Fluticasonebrand: Azelastine-Fluticasone | 76 | 27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,195 across 66 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 282 Washington StHartford, CT 06106-3322Phone: (860) 545-9000
- 100 Grand StNew Britain, CT 06052-2016Phone: (860) 224-5011
- 9200 W Wisconsin AveMilwaukee, WI 53226-3522Phone: (414) 805-0532
Registry dates
- Enumerated
- 2012-03-24
- Last updated
- 2022-04-14
- Certified
- 2022-04-14
Frequently asked questions
- What is Wei an's NPI number?
- Wei an's National Provider Identifier (NPI) is 1942576947, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wei an's specialty?
- Wei an is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is Wei an located?
- Wei an's practice location on file with NPPES is 836 Farmington Ave Ste 207, West Hartford, CT 06119-1544.
- What is Wei an's phone number?
- The practice phone number listed in the NPPES registry for Wei an is (860) 232-9911.
- Does Wei an accept Medicare?
- Wei an is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wei an's NPI active?
- Yes — Wei an's NPI (1942576947) is active in the NPPES registry as of the last update on 2022-04-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.