Charles Tuan-Tu Nguyen, MD
NPI 1942380118 · Psychiatry Physician · Irvine, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Tuan-Tu Nguyen, MD is a Psychiatry Physician provider in Irvine, CA (NPI 1942380118).
Provider details
- NPI number
- 1942380118
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 000000A69542 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,155 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) |
|---|---|---|
| Psychotherapy, 30 Minutes90832 | 760 | $72 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 318 | $81 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional99211 | 308 | $24 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 303 | $127 |
| Assessment of Health Behavior96156 | 216 | $100 |
| Detection Test By Immunoassay With Direct Visual Observation for Severe Acute Respiratory Syndrome Coronavirus 2 (covid-19)87811 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 58 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 521 | 47 |
| Trazodone Hcl | 458 | 53 |
| Olanzapine | 449 | 48 |
| Risperidone | 434 | 40 |
| Divalproex Sodium | 363 | 31 |
| Benztropine Mesylate | 320 | 34 |
| Clonazepam | 266 | 28 |
| Sertraline Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$513,938 across 640 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
Additional practice locations (1)
- 5901 E 7th StLong Beach, CA 90822-5201Phone: (562) 826-8000
Registry dates
- Enumerated
- 2006-10-16
- Last updated
- 2025-04-07
- Certified
- 2025-04-07
Frequently asked questions
- What is Charles Tuan-Tu Nguyen's NPI number?
- Charles Tuan-Tu Nguyen's National Provider Identifier (NPI) is 1942380118, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Tuan-Tu Nguyen's specialty?
- Charles Tuan-Tu Nguyen is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Tuan-Tu Nguyen located?
- Charles Tuan-Tu Nguyen's practice location on file with NPPES is 3 Salton, Irvine, CA 92602-2425.
- What is Charles Tuan-Tu Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Charles Tuan-Tu Nguyen is (909) 610-9524.
- Does Charles Tuan-Tu Nguyen accept Medicare?
- Charles Tuan-Tu Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Tuan-Tu Nguyen's NPI active?
- Yes — Charles Tuan-Tu Nguyen's NPI (1942380118) is active in the NPPES registry as of the last update on 2025-04-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.