Lam Nguyen
NPI 1558995860 · Psychiatric/Mental Health Registered Nurse · Cerritos, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lam Nguyen is a Psychiatric/Mental Health Registered Nurse provider in Cerritos, CA (NPI 1558995860).
Provider details
- NPI number
- 1558995860
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Registered NurseNursing Service Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 820798 (CA)
Specialties & taxonomies
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
6 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
114 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) |
|---|---|---|
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 97 | $67 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 17 | $58 |
Typical Medicare-allowed amounts for these services range $58–$67 (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 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 82 | — |
| Lorazepam | 79 | 27 |
| Quetiapine Fumarate | 78 | 20 |
| Divalproex Sodium | 61 | 21 |
| Trazodone Hcl | 44 | 17 |
| Risperidone | 41 | 12 |
| Benztropine Mesylate | 39 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$522 across 8 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
- 2020-02-25
- Last updated
- 2020-02-25
- Certified
- 2020-02-25
Frequently asked questions
- What is Lam Nguyen's NPI number?
- Lam Nguyen's National Provider Identifier (NPI) is 1558995860, 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 Psychiatric/Mental Health Registered Nurse (Nursing Service Providers).
- Where is Lam Nguyen located?
- Lam Nguyen's practice location on file with NPPES is 10802 College Pl, Cerritos, CA 90703-1505.
- What is Lam Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Lam Nguyen is (562) 924-9581.
- 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 (1558995860) is active in the NPPES registry as of the last update on 2020-02-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.