Quyen Nguyen
NPI 1194040303 · Allergy & Immunology (Internal Medicine) Physician · Pittsburgh, PA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Quyen Nguyen is a Allergy & Immunology (Internal Medicine) Physician provider in Pittsburgh, PA (NPI 1194040303).
Provider details
- NPI number
- 1194040303
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- MD457181 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
230 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 161 | $112 |
| Critical Care, First 30-74 Minutes99291 | 69 | $202 |
Typical Medicare-allowed amounts for these services range $112–$202 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Tadalafil | 81 |
| Sildenafil Citrate | 43 |
| Ambrisentan | 27 |
| Riociguatbrand: Adempas | 27 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 26 |
| Treprostinilbrand: Tyvaso Dpi | 25 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 23 |
| Selexipagbrand: Uptravi | 23 |
| Spironolactone |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-03-30
- Last updated
- 2021-05-24
Frequently asked questions
- What is Quyen Nguyen's NPI number?
- Quyen Nguyen's National Provider Identifier (NPI) is 1194040303, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Quyen Nguyen's specialty?
- Quyen Nguyen is listed in the NPPES registry with a primary specialty of Allergy & Immunology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Quyen Nguyen located?
- Quyen Nguyen's practice location on file with NPPES is 3459 5th Ave, Pittsburgh, PA 15213-3236.
- What is Quyen Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Quyen Nguyen is (412) 692-2210.
- Does Quyen Nguyen accept Medicare?
- Quyen Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Quyen Nguyen's NPI active?
- Yes — Quyen Nguyen's NPI (1194040303) is active in the NPPES registry as of the last update on 2021-05-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.