Doctor profile · Federal record
Dr. Thomas Quach, MD
Obstetrics & Gynecology Physician (CMS: Obstetrics/Gynecology) · Westminster, CA
- NPI 1033123146
- Accepts Medicare
- 33 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
9186 Bolsa Ave
Westminster, CA 926835556
(714) 799-7522
fax (714) 799-7523
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- October 10, 2025
- Year of graduation
- 1993 — 33 yrs since
- Specialty taxonomy
- 207V00000X — NUCC code
- State license (1)
- California #G080556
- Medicaid
- CA #00G805560
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1033123146. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
304
Distinct HCPCS
4
Medicare allowed
$28,331
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 210 | 99 | $99 | |
G0101 |
Cervical or vaginal cancer screening; pelvic and clinical breast examination | 47 | 47 | $43 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 33 | 33 | $122 | |
58100 |
Biopsy of lining of uterus | 14 | 14 | $113 |
In context: peer comparison
Among 3 peers in this city , average services per provider: 46. This provider delivers 6.6× the peer median.Open Payments
Industry payments received
All-time total
$144
Transactions
6
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Astellas Pharma US Inc | 2 | $47.42 | |
| Dexcom, Inc. | 2 | $37.56 | |
| CooperSurgical, Inc. | 1 | $30.15 | |
| SHIELD THERAPEUTICS INC | 1 | $28.82 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
101
Patients
43
Total drug cost
$8,203
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Ibuprofen | Generic | 25 | 20 | $58 |
| Estradiol | Generic | 23 | 11 | $2,097 |
| Fluconazole | Generic | 16 | 0 | $235 |
| Nitrofurantoin Mono-Macro (Nitrofurantoin Monohyd/M-Cryst) | Brand | 13 | 0 | $270 |
| Misoprostol | Generic | 12 | 12 | $28 |
| Premarin (Estrogens, Conjugated) | Brand | 12 | 0 | $5,514 |
Hospital affiliations
Frequently asked questions
What is Dr. Thomas Quach's medical specialty?
Dr. Thomas Quach practices Obstetrics & Gynecology Physician in Westminster, CA.
Where does Dr. Thomas Quach practice?
Dr. Thomas Quach practices at 9186 Bolsa Ave, Westminster, CA 926835556. Office phone: 7147997522.
What is Dr. Thomas Quach's NPI?
Dr. Thomas Quach's National Provider Identifier (NPI) is 1033123146, issued by NPPES.
Does Dr. Thomas Quach accept Medicare assignment?
Yes. Dr. Thomas Quach accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Thomas Quach commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Cervical or vaginal cancer screening; pelvic and clinical breast examination (HCPCS G0101); New patient office or other outpatient visit (HCPCS 99203). Source: CMS Medicare Physician & Other Practitioners file.