Physician Profile
Unclaimed ProfileAbout YAN
Based in San Francisco, CA, James K. Yan, D.O. is listed in the NPI registry under gastroenterology. James graduated from College of Osteo Med of the Pacific at Pomona in 1991. According to Medicare claims data, James cared for 265 Medicare patients across 276 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (415) 781-1818
- Email not available
Practice Locations
728 PACIFIC AVE STE 305
San Francisco, CA 94133
Procedures Most Often Billed to Medicare
276 services · 265 patients · 7 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
37 |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
26 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
19 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
67 |
| 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 monit | Billing code | G0500 |
65 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
49 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
13 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 3
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other gastroenterology specialists in San Francisco 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at College of Osteo Med of the Pacific at Pomona 8
Other providers in the same specialty who trained at the same institution.
Class of 1991 at College of Osteo Med of the Pacific at Pomona 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Yan?
Dr. Yan is a gastroenterology in San Francisco, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
What is Dr. Yan's address?
Dr. Yan is listed at 728 PACIFIC AVE STE 305, San Francisco, CA 94133. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Yan?
The number on file is (415) 781-1818. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Yan's NPI number?
Dr. Yan's National Provider Identifier is 1588683890. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Yan train?
Dr. Yan attended College of Osteo Med of the Pacific at Pomona, graduating in 1991. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Yan been practicing?
Dr. Yan has 35 years experience. Calculated from a graduation year of 1991, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Yan perform?
According to Medicare billing data, Dr. Yan performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, diagnostic exam of large bowel using a flexible endoscope and biopsy of large bowel using a flexible endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Yan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Yan. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.