Doctor profile · Federal record
Dr. James Yan, D.O.
Gastroenterology Physician (CMS: Gastroenterology) · San Francisco, CA
- NPI 1588683890
- Accepts Medicare
- 35 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
728 Pacific Ave Ste 305
San Francisco, CA 941334449
(415) 781-1818
fax (415) 781-1889
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1991 — 35 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- California #20AX6238
- Medicaid
- CA #00AX62380
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1588683890. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
257
Distinct HCPCS
6
Medicare allowed
$25,753
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 97 | 75 | $107 | |
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 | 54 | 54 | $6 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 37 | 37 | $132 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 34 | 34 | $111 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 20 | 20 | $204 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 15 | 15 | $154 |
In context: peer comparison
Among 24 peers in San Francisco Gastroenterology Physician, average services per provider: 42. This provider delivers 6.1× the peer median.Open Payments
Industry payments received
All-time total
$2,707
Transactions
29
Manufacturers
11
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| AstraZeneca Pharmaceuticals Lp | 1 | $1,903.50 | |
| Gilead Sciences, INC. | 9 | $312.41 | |
| Abbvie INC. | 6 | $161.32 | |
| Ironwood Pharmaceuticals, INC | 6 | $153.89 | |
| Lilly USA, LLC | 1 | $32.80 | |
| Endogastric Solutions, INC | 1 | $28.96 | |
| Intercept Pharmaceuticals, INC. | 1 | $28.00 | |
| Janssen Biotech, INC. | 1 | $25.53 | |
| Phathom Pharmaceuticals, INC. | 1 | $20.83 | |
| Celltrion USA INC. | 1 | $20.37 | |
| Exact Sciences Corporation | 1 | $19.44 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,991
Patients
1,105
Total drug cost
$745,610
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 462 | 233 | $10,542 |
| Gavilyte-C (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 448 | 444 | $8,464 |
| Vemlidy (Tenofovir Alafenamide) | Brand | 301 | 33 | $448,397 |
| Omeprazole | Generic | 134 | 81 | $3,114 |
| Metoclopramide Hcl | Generic | 120 | 53 | $1,188 |
| Linzess (Linaclotide) | Brand | 109 | 52 | $165,916 |
| Famotidine | Generic | 81 | 36 | $2,950 |
| Dicyclomine Hcl | Generic | 71 | 33 | $1,603 |
| Amoxicillin | Generic | 45 | 45 | $310 |
| Clarithromycin | Generic | 45 | 45 | $888 |
Hospital affiliations
Frequently asked questions
What is Dr. James Yan's medical specialty?
Dr. James Yan practices Gastroenterology Physician in San Francisco, CA.
Where does Dr. James Yan practice?
Dr. James Yan practices at 728 Pacific Ave Ste 305, San Francisco, CA 941334449. Office phone: 4157811818.
What is Dr. James Yan's NPI?
Dr. James Yan's National Provider Identifier (NPI) is 1588683890, issued by NPPES.
Does Dr. James Yan accept Medicare assignment?
Yes. Dr. James Yan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. James Yan commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); 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); New patient office or other outpatient visit (HCPCS 99203). Source: CMS Medicare Physician & Other Practitioners file.