Dieu Thu Nguyen, MD
NPI 1720013105 · Internal Medicine Physician · San Fernando, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dieu Thu Nguyen, MD is a Internal Medicine Physician provider in San Fernando, CA (NPI 1720013105).
Provider details
- NPI number
- 1720013105
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G080843 (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
19 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
324 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 | 149 | $99 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 135 | $9 |
| Admn Sarscov2 Vacc 1 Dose90480 | 16 | $47 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 13 | $139 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 11 | $68 |
Typical Medicare-allowed amounts for these services range $9–$139 (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 · 36 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 132 | 47 |
| Amlodipine Besylate | 101 | 39 |
| Metformin Hcl | 90 | 30 |
| Losartan Potassium | 89 | 30 |
| Empagliflozinbrand: Jardiance | 58 | 13 |
| Glimepiride | 56 | 16 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-12
- Last updated
- 2007-07-08
Frequently asked questions
- What is Dieu Thu Nguyen's NPI number?
- Dieu Thu Nguyen's National Provider Identifier (NPI) is 1720013105, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dieu Thu Nguyen's specialty?
- Dieu Thu Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Dieu Thu Nguyen located?
- Dieu Thu Nguyen's practice location on file with NPPES is 1212 Pico Street, San Fernando, CA 91340.
- What is Dieu Thu Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Dieu Thu Nguyen is (818) 837-6969.
- Does Dieu Thu Nguyen accept Medicare?
- Dieu Thu Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dieu Thu Nguyen's NPI active?
- Yes — Dieu Thu Nguyen's NPI (1720013105) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.