Doctor profile · Federal record
Dr. Yen Quang, M.D.
Gastroenterology Physician (CMS: Internal Medicine) · San Francisco, CA
- NPI 1326228487
- Accepts Medicare
- 20 yrs in practice
- Female
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
1199 Bush St Ste 560
San Francisco, CA 94109
(415) 885-8080
Credentials & registration
- NPI registered
- November 2007 — 19 yrs on file
- Profile last updated
- June 11, 2018
- Year of graduation
- 2006 — 20 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- California #A101985
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1326228487. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
411
Distinct HCPCS
10
Medicare allowed
$49,843
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 146 | 87 | $143 | |
G0500 |
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito | 72 | 69 | $5 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 36 | 36 | $143 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 34 | 30 | $102 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 31 | 31 | $95 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 29 | 29 | $185 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 25 | 25 | $126 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 15 | 15 | $242 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 12 | 11 | $234 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 11 | 11 | $183 |
In context: peer comparison
Among 24 peers in San Francisco Gastroenterology Physician, average services per provider: 42. This provider delivers 9.8× the peer median.Open Payments
Industry payments received
All-time total
$169
Transactions
2
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Janssen Pharmaceuticals, INC | 1 | $128.87 | |
| Olympus America INC. | 1 | $39.98 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
657
Patients
349
Total drug cost
$185,013
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 122 | 118 | $9,119 |
| Omeprazole | Generic | 120 | 69 | $2,955 |
| Famotidine | Generic | 112 | 67 | $2,863 |
| Pantoprazole Sodium | Generic | 57 | 32 | $1,489 |
| Vemlidy (Tenofovir Alafenamide) | Brand | 53 | 0 | $80,417 |
| Tenofovir Disoproxil Fumarate | Generic | 40 | 0 | $19,197 |
| Linzess (Linaclotide) | Brand | 38 | 17 | $32,057 |
| Dicyclomine Hcl | Generic | 36 | 19 | $1,009 |
| Creon (Lipase/Protease/Amylase) | Brand | 15 | 0 | $14,919 |
| Suprep (Sodium, Potassium,Mag Sulfates) | Brand | 15 | 15 | $1,677 |
Hospital affiliations
Frequently asked questions
What is Dr. Yen Quang's medical specialty?
Dr. Yen Quang practices Gastroenterology Physician in San Francisco, CA.
Where does Dr. Yen Quang practice?
Dr. Yen Quang practices at 1199 Bush St Ste 560, San Francisco, CA 94109. Office phone: 4158858080.
What is Dr. Yen Quang's NPI?
Dr. Yen Quang's National Provider Identifier (NPI) is 1326228487, issued by NPPES.
Does Dr. Yen Quang accept Medicare assignment?
Yes. Dr. Yen Quang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Yen Quang commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (HCPCS G0500); Biopsy of large bowel using a flexible endoscope (HCPCS 45380). Source: CMS Medicare Physician & Other Practitioners file.