Minh Nguyen, M.D.
NPI 1154403640 · Internal Medicine Physician · San Marcos, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Minh Nguyen, M.D. is a Internal Medicine Physician provider in San Marcos, CA (NPI 1154403640).
Provider details
- NPI number
- 1154403640
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A89951 (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
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
340 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 35 Minutes99232 | 132 | $80 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 125 | $121 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 38 | $118 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 32 | $175 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 13 | $83 |
Typical Medicare-allowed amounts for these services range $80–$175 (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 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 92 | 51 |
| Amlodipine Besylate | 76 | 44 |
| Losartan Potassium | 59 | 33 |
| Rosuvastatin Calcium | 49 | 29 |
| Metformin Hcl | 48 | 23 |
| Furosemide | 47 | 29 |
| Lisinopril | 45 |
Practice location
Mailing address
Additional practice locations (1)
- 2185 Citracado PkwyEscondido, CA 92029-4159Phone: (760) 291-6700
Registry dates
- Enumerated
- 2006-10-20
- Last updated
- 2025-01-07
- Certified
- 2025-01-07
Frequently asked questions
- What is Minh Nguyen's NPI number?
- Minh Nguyen's National Provider Identifier (NPI) is 1154403640, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Minh Nguyen's specialty?
- Minh Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Minh Nguyen located?
- Minh Nguyen's practice location on file with NPPES is 885 Orion Way, San Marcos, CA 92078-0914.
- What is Minh Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Minh Nguyen is (619) 757-0141.
- Does Minh Nguyen accept Medicare?
- Minh Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Minh Nguyen's NPI active?
- Yes — Minh Nguyen's NPI (1154403640) is active in the NPPES registry as of the last update on 2025-01-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.