Doctor profile · Federal record
Dr. Charles Tuan-Tu Nguyen, MD
Psychiatry Physician (CMS: Psychiatry) · Irvine, CA
- NPI 1942380118
- Accepts Medicare
- 28 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
3 Salton
Irvine, CA 926022425
(909) 610-9524
fax (909) 367-2922 - Additional location
-
5901 E 7Th St
Long Beach, CA 908225201
(562) 826-8000 - Mailing address
-
5901 E 7Th St
Long Beach, CA 908225201
Credentials & registration
- NPI registered
- October 2006 — 20 yrs on file
- Profile last updated
- April 7, 2025
- Year of graduation
- 1998 — 28 yrs since
- Specialty taxonomy
- 2084P0800X — NUCC code
- State license (1)
- California #000000A69542
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1942380118. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,807
Distinct HCPCS
8
Medicare allowed
$81,763
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99211 |
Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional | 693 | 56 | $24 | |
87811 |
Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) | 652 | 54 | $41 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 175 | 38 | $83 | |
90832 |
Psychotherapy, 30 minutes | 145 | 27 | $60 | |
96156 |
Assessment of health behavior | 74 | 32 | $97 | |
99493 |
Follow-up psychiatric collaborative care management, subsequent calendar month, first 60 minutes | 27 | 21 | $102 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 26 | 26 | $137 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 15 | 14 | $115 |
In context: peer comparison
Among 5 peers in Irvine Psychiatry Physician, average services per provider: 191. This provider delivers 9.5× the peer median.Open Payments
Industry payments received
All-time total
$513,938
Transactions
640
Manufacturers
12
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Otsuka America Pharmaceutical, INC. | 252 | $171,302.83 | |
| Iti, INC. (D/B/A Intra-Cellular Therapies, INC.) | 142 | $133,582.76 | |
| Axsome Therapeutics, INC. | 83 | $98,879.28 | |
| Neurocrine Biosciences, INC. | 110 | $89,503.70 | |
| E.R. Squibb & Sons, L.L.C. | 26 | $19,275.30 | |
| Otsuka Pharmaceutical Development & Commercialization, INC. | 6 | $482.29 | |
| Teva Pharmaceuticals USA, INC. | 4 | $240.75 | |
| Alkermes, INC. | 9 | $230.49 | |
| Lundbeck LLC | 3 | $152.68 | |
| Vanda Pharmaceuticals INC. | 1 | $125.00 | |
| Indivior INC. | 1 | $94.20 | |
| Abbvie INC. | 3 | $68.22 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
3,661
Patients
459
Total drug cost
$657,778
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Trazodone Hcl | Generic | 465 | 58 | $5,355 |
| Quetiapine Fumarate | Generic | 447 | 54 | $14,767 |
| Olanzapine | Generic | 406 | 48 | $15,214 |
| Divalproex Sodium | Generic | 343 | 41 | $15,796 |
| Risperidone | Generic | 324 | 38 | $6,209 |
| Benztropine Mesylate | Generic | 279 | 39 | $4,363 |
| Clonazepam | Generic | 221 | 26 | $1,801 |
| Sertraline Hcl | Generic | 205 | 27 | $2,572 |
| Lorazepam | Generic | 173 | 23 | $1,633 |
| Invega Sustenna (Paliperidone Palmitate) | Brand | 158 | 23 | $547,716 |
Frequently asked questions
What is Dr. Charles Tuan-Tu Nguyen's medical specialty?
Dr. Charles Tuan-Tu Nguyen practices Psychiatry Physician in Irvine, CA.
Where does Dr. Charles Tuan-Tu Nguyen practice?
Dr. Charles Tuan-Tu Nguyen practices at 3 Salton, Irvine, CA 926022425. Office phone: 9096109524.
What is Dr. Charles Tuan-Tu Nguyen's NPI?
Dr. Charles Tuan-Tu Nguyen's National Provider Identifier (NPI) is 1942380118, issued by NPPES.
Does Dr. Charles Tuan-Tu Nguyen accept Medicare assignment?
Yes. Dr. Charles Tuan-Tu Nguyen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Charles Tuan-Tu Nguyen commonly perform?
Top Medicare-reported procedures in 2023: Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional (HCPCS 99211); Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) (HCPCS 87811); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232). Source: CMS Medicare Physician & Other Practitioners file.