Giulianna Nguyen, M.D.
NPI 1538302815 · Internal Medicine Physician · Torrance, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Giulianna Nguyen, M.D. is a Internal Medicine Physician provider in Torrance, CA (NPI 1538302815).
Provider details
- NPI number
- 1538302815
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A113985 (CA)
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
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
103 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 40 | $99 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 20 | $140 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 17 | $99 |
| Telephone Medical Discussion With Physician, 5-10 Minutes99441 | 14 | $62 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 12 | $16 |
Typical Medicare-allowed amounts for these services range $16–$140 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 61 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 375 | 120 |
| Rosuvastatin Calcium | 189 | 68 |
| Amlodipine Besylate | 181 | 61 |
| Levothyroxine Sodium | 160 | 49 |
| Losartan Potassium | 158 | 54 |
| Gabapentin | 114 | 48 |
| Omeprazole |
Practice location
Mailing address
Additional practice locations (1)
- 6041 Cadillac AveLos Angeles, CA 90034-1702Phone: (323) 857-3318
Registry dates
- Enumerated
- 2009-04-15
- Last updated
- 2026-01-04
- Certified
- 2026-01-04
Frequently asked questions
- What is Giulianna Nguyen's NPI number?
- Giulianna Nguyen's National Provider Identifier (NPI) is 1538302815, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Giulianna Nguyen's specialty?
- Giulianna Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Giulianna Nguyen located?
- Giulianna Nguyen's practice location on file with NPPES is 2200 Sepulveda Blvd, Torrance, CA 90501-5301.
- What is Giulianna Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Giulianna Nguyen is (310) 326-9167.
- Does Giulianna Nguyen accept Medicare?
- Giulianna Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Giulianna Nguyen's NPI active?
- Yes — Giulianna Nguyen's NPI (1538302815) is active in the NPPES registry as of the last update on 2026-01-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.