Thuy Nguyen, MD
NPI 1336162858 · Emergency Medicine Physician · Rancho Cucamonga, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thuy Nguyen, MD is a Emergency Medicine Physician provider in Rancho Cucamonga, CA (NPI 1336162858).
Provider details
- NPI number
- 1336162858
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A80322 (CA)
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
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
203 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 43 | $132 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 40 | $90 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 28 | $15 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 24 | $115 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 22 | $57 |
| Automated Urinalysis Test81003 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 109 | 24 |
| Alendronate Sodium | 85 | 24 |
| Ergocalciferol (vitamin D2)brand: Vitamin D2 | 60 | 16 |
| Amlodipine Besylate | 46 | 14 |
| Levothyroxine Sodium | 46 | 11 |
| Lisinopril | 44 | 12 |
| Fluticasone Propionate | 34 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$143 across 6 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
Registry dates
- Enumerated
- 2006-07-25
- Last updated
- 2021-03-09
- Certified
- 2021-01-26
Frequently asked questions
- What is Thuy Nguyen's NPI number?
- Thuy Nguyen's National Provider Identifier (NPI) is 1336162858, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thuy Nguyen's specialty?
- Thuy Nguyen is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thuy Nguyen located?
- Thuy Nguyen's practice location on file with NPPES is 9695 Baseline Rd, Rancho Cucamonga, CA 91730-1314.
- What is Thuy Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Thuy Nguyen is (909) 941-0920.
- Does Thuy Nguyen accept Medicare?
- Thuy Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thuy Nguyen's NPI active?
- Yes — Thuy Nguyen's NPI (1336162858) is active in the NPPES registry as of the last update on 2021-03-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.