An Nguyen, M.D.
NPI 1841559283 · Allergy & Immunology Physician · Houston, TX
Enrolled with Medicare as Practitioner - Allergy/Immunology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
An Nguyen, M.D. is a Allergy & Immunology Physician provider in Houston, TX (NPI 1841559283).
Provider details
- NPI number
- 1841559283
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- Q2691 (TX)
Specialties & taxonomies
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
3,858 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 | 2,315 | $4 |
| Test for Allergy Using Allergenic Extract Injected Into Skin95024 | 759 | $8 |
| Professional Service for Preparation and Provision of Single-Dose Vial of Allergen95144 | 563 | $17 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 87 | $90 |
| Administration and Interpretation of Patient-Focused Health Risk Assessment96160 | 36 | $3 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 33 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Azelastine Hcl | 61 | 33 |
| Fluticasone Propionate | 47 | 22 |
| Montelukast Sodium | 42 | 11 |
| Epinephrine | 31 | 29 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 30 | 16 |
| Ipratropium Bromide | 26 | 13 |
| Levocetirizine Dihydrochloride | 23 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,974 across 140 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 (1)
- 1709 Dryden RdHouston, TX 77030-2400Phone: (713) 798-0190Fax: (713) 798-0198
Registry dates
- Enumerated
- 2012-05-04
- Last updated
- 2023-03-07
Frequently asked questions
- What is An Nguyen's NPI number?
- An Nguyen's National Provider Identifier (NPI) is 1841559283, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is An Nguyen's specialty?
- An Nguyen is listed in the NPPES registry with a primary specialty of Allergy & Immunology Physician (Allopathic & Osteopathic Physicians).
- Where is An Nguyen located?
- An Nguyen's practice location on file with NPPES is 1213 Hermann Dr Ste 550, Houston, TX 77004-7089.
- What is An Nguyen's phone number?
- The practice phone number listed in the NPPES registry for An Nguyen is (713) 820-6380.
- Does An Nguyen accept Medicare?
- An Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is An Nguyen's NPI active?
- Yes — An Nguyen's NPI (1841559283) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.