Doctor profile · Federal record
Dr. Catherine Nguyen-Loh, DO
Family Medicine Physician (CMS: Family Practice) · Fountain Valley, CA
- NPI 1558828848
- Accepts Medicare
- 7 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
8970 Warner Ave
Fountain Valley, CA 927083211
(714) 477-8400
fax (714) 477-8401
Credentials & registration
- NPI registered
- February 2019 — 7 yrs on file
- Profile last updated
- March 5, 2024
- Year of graduation
- 2019 — 7 yrs since
- Specialty taxonomy
- 207Q00000X — NUCC code
- State license (1)
- California #20A20201
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1558828848. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
211
Distinct HCPCS
4
Medicare allowed
$24,868
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 90 | 62 | $98 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 90 | 55 | $139 | |
99442 |
Telephone medical discussion with physician, 11-20 minutes | 18 | 16 | $98 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 13 | 13 | $140 |
In context: peer comparison
Among 16 peers in this city , average services per provider: 78. This provider delivers 2.7× the peer median.Open Payments
Industry payments received
All-time total
$29
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Lilly USA, LLC | 1 | $29.01 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
412
Patients
138
Total drug cost
$7,823
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 81 | 35 | $1,469 |
| Amlodipine Besylate | Generic | 40 | 16 | $338 |
| Levothyroxine Sodium | Generic | 39 | 18 | $1,456 |
| Losartan Potassium | Generic | 37 | 15 | $731 |
| Fluticasone Propionate | Generic | 33 | 13 | $438 |
| Gabapentin | Generic | 24 | 0 | $246 |
| Simvastatin | Generic | 21 | 0 | $450 |
| Alprazolam | Generic | 19 | 0 | $167 |
| Lisinopril | Generic | 18 | 0 | $258 |
| Metformin Hcl | Generic | 18 | 11 | $356 |
Hospital affiliations
Frequently asked questions
What is Dr. Catherine Nguyen-Loh's medical specialty?
Dr. Catherine Nguyen-Loh practices Family Medicine Physician in Fountain Valley, CA.
Where does Dr. Catherine Nguyen-Loh practice?
Dr. Catherine Nguyen-Loh practices at 8970 Warner Ave, Fountain Valley, CA 927083211. Office phone: 7144778400.
What is Dr. Catherine Nguyen-Loh's NPI?
Dr. Catherine Nguyen-Loh's National Provider Identifier (NPI) is 1558828848, issued by NPPES.
Does Dr. Catherine Nguyen-Loh accept Medicare assignment?
Yes. Dr. Catherine Nguyen-Loh accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Catherine Nguyen-Loh commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Telephone medical discussion with physician (HCPCS 99442). Source: CMS Medicare Physician & Other Practitioners file.