Lam Nguyen, M.D.
NPI 1538594122 · Internal Medicine Physician · Pico Rivera, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lam Nguyen, M.D. is a Internal Medicine Physician provider in Pico Rivera, CA (NPI 1538594122).
Provider details
- NPI number
- 1538594122
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A126111 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 74 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 342 | 128 |
| Amlodipine Besylate | 306 | 104 |
| Rosuvastatin Calcium | 202 | 75 |
| Losartan Potassium | 184 | 65 |
| Lisinopril | 115 | 44 |
| Lisinopril/Hydrochlorothiazidebrand: Lisinopril-Hydrochlorothiazide | 108 | 43 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-09-13
- Last updated
- 2021-11-17
- Certified
- 2021-11-17
Frequently asked questions
- What is Lam Nguyen's NPI number?
- Lam Nguyen's National Provider Identifier (NPI) is 1538594122, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lam Nguyen's specialty?
- Lam Nguyen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Lam Nguyen located?
- Lam Nguyen's practice location on file with NPPES is 9330 Washington Blvd, Pico Rivera, CA 90660-3838.
- What is Lam Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Lam Nguyen is (562) 205-4200.
- Does Lam Nguyen accept Medicare?
- Lam Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lam Nguyen's NPI active?
- Yes — Lam Nguyen's NPI (1538594122) is active in the NPPES registry as of the last update on 2021-11-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.