Doctor profile · Federal record
Dr. Tien Nguyen, MD
Neurological Surgery Physician (CMS: Neurosurgery) · Orthopaedic Surgery Physician · Fountain Valley, CA
- NPI 1356385025
- Accepts Medicare
- MIPS 75.0 / 100 · 2023
- 33 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
11190 Warner Ave, Suite 305
Fountain Valley, CA 927084019
(714) 433-2000
fax (714) 433-2901
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- February 28, 2013
- Year of graduation
- 1993 — 33 yrs since
- Specialty taxonomy
- 207T00000X — NUCC code
- State license (1)
- California #G81962
- Medicaid
- CA #00G819620
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1356385025. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,143
Distinct HCPCS
7
Medicare allowed
$166,168
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 244 | 108 | $83 | |
99291 |
Critical care, first 30-74 minutes | 209 | 88 | $222 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 199 | 187 | $137 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 198 | 145 | $139 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 162 | 162 | $180 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 103 | 38 | $125 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 28 | 28 | $98 |
In context: peer comparison
Among 1 peers in Fountain Valley Neurological Surgery Physician, average services per provider: 163. This provider delivers 7.0× the peer median.Open Payments
Industry payments received
All-time total
$12,923
Transactions
40
Manufacturers
8
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Biogennix, LLC | 2 | $8,269.00 | |
| Lilly USA, LLC | 6 | $3,812.17 | |
| Biotissue Holdings INC. | 27 | $488.85 | |
| Ucb, INC. | 1 | $143.89 | |
| Silk Road Medical, INC. | 1 | $135.38 | |
| Orthofix Medical, INC. | 1 | $34.99 | |
| Janssen Biotech, INC. | 1 | $21.98 | |
| Abbvie INC. | 1 | $16.94 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
104
Patients
29
Total drug cost
$1,371
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gabapentin | Generic | 77 | 29 | $1,249 |
| Tramadol Hcl | Generic | 16 | 0 | $72 |
| Acetaminophen-Codeine (Acetaminophen With Codeine) | Brand | 11 | 0 | $50 |
Hospital affiliations
Frequently asked questions
What is Dr. Tien Nguyen's medical specialty?
Dr. Tien Nguyen practices Neurological Surgery Physician in Fountain Valley, CA.
Where does Dr. Tien Nguyen practice?
Dr. Tien Nguyen practices at 11190 Warner Ave, Fountain Valley, CA 927084019. Office phone: 7144332000.
What is Dr. Tien Nguyen's NPI?
Dr. Tien Nguyen's National Provider Identifier (NPI) is 1356385025, issued by NPPES.
Does Dr. Tien Nguyen accept Medicare assignment?
Yes. Dr. Tien Nguyen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Tien Nguyen commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Critical care (HCPCS 99291); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.