Where to find Charles Tuan-Tu S. Nguyen, MD
- Irvine location main office
3 Salton, Irvine, CA 92602 - Long Beach location
5901 E 7th St, Long Beach, CA 90822
About Dr. Nguyen
Charles Tuan-Tu S. Nguyen, MD practices psychiatry in Irvine, CA. Charles Tuan-Tu is a 1998 graduate of Irvine California College of Medicine. According to Medicare claims data, Charles Tuan-Tu cared for 372 Medicare patients across 2,155 services. The services billed most often include psychotherapy, 30 minutes, subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, and office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional. The provider's National Provider Identifier (NPI) is 1942380118.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (909) 610-9524
- Email not available
Practice Locations
3 SALTON
Irvine, CA 92602
5901 E 7th St
Long Beach, CA 90822
Conditions Commonly Evaluated or Treated
Within Psychiatry generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Anxiety, trauma, and obsessive-compulsive
Mood disorders
Psychotic disorders
Substance-related and addictive
Addiction & Substance Use
Cognitive and adjustment
Eating Disorders
Eating, sleep, and somatic
Mood & Depression
Neurodevelopmental and behavioral
Personality and dissociative
Sleep & Wakefulness
Procedures & services
Most searched procedures
- Anxiety and depression treatment
- Cognitive behavioral therapy
- Medication management
- Psychiatric evaluation
- Telepsychiatry
Assessment
Addiction care
Addiction Medicine
Assessments
Brain stimulation
Consultations
Diagnostics
Inpatient care
Interventional psychiatry
Psychotherapy
Sleep Medicine
Specialized care
Therapy
Therapy and care
Procedures Most Often Billed to Medicare
2,155 services · 372 patients · 9 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Psychotherapy, 30 minutes | Treatment | 90832 |
760 | More than most peers in Psychiatry |
| Assessment of health behavior | Treatment | 96156 |
216 | Too few peers to compare |
| Psychotherapy, 45 minutes | Treatment | 90834 |
13 | Less often than most peers in Psychiatry |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
318 | More often than most peers in Psychiatry |
| Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional | Office visit | 99211 |
308 | More than most peers in Psychiatry |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
303 | More often than most peers in Psychiatry |
| Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) | Lab test | 87811 |
174 | Too few peers to compare |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
37 | More often than most peers in Psychiatry |
| Follow-up psychiatric collaborative care management, subsequent calendar month, first 60 minutes | Office visit | 99493 |
26 | Too few peers to compare |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other psychiatrists in Irvine 8
Same specialty, same city.
Trained at Irvine California College of Medicine 3
Other providers in the same specialty who trained at the same institution.
Class of 1998 at Irvine California College of Medicine 1
Providers who graduated from the same medical school in the same year.
More connections — 7 related providers in 1 group
Also performs Psychotherapy, 30 minutes 7
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Nguyen specialize in?
Dr. Nguyen is a psychiatrist in Irvine, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Psychiatry”.
NPI registry
Where is Dr. Nguyen located?
Dr. Nguyen is listed at 3 Salton, Irvine, CA 92602. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Nguyen's phone number?
The number on file is (909) 610-9524. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Nguyen's NPI number?
Dr. Nguyen's National Provider Identifier is 1942380118. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Nguyen go to medical school?
Dr. Nguyen attended Irvine California College of Medicine, graduating in 1998. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Nguyen been practicing?
Dr. Nguyen has 28 years experience. Calculated from a graduation year of 1998, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Nguyen do most often?
According to Medicare billing data, Dr. Nguyen provides treatments such as psychotherapy, 30 minutes and assessment of health behavior, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Nguyen confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Nguyen. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.