Dr. James K. Yan, DO
- Medicare services, 2024
- 276
- Medicare patients, 2024
- 96
- Part D claims, 2024
- 2,277
- Hospital affiliations
- 3
- Industry payments
- $22,610
- Practice address
- 3370 Geary Boulevard, First Floor, San Francisco, CA 94118
- Practice phone
- Call (415) 379-7500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Golden Gate Endoscopy Center
Surgery Center - Medicare-Certified · San Francisco, California
Find Dr. Yan's professional email, personal email and mobile number
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Dr. James K. Yan is a gastroenterologist in San Francisco, California
Dr. Yan practices at Golden Gate Endoscopy Center in San Francisco, California.
Dr. Yan's NPI, 1588683890, was assigned on July 18, 2006. Dr. Yan graduated from WesternU College of Osteopathic Medicine of the Pacific in 1991. Dr. Yan holds California license 20AX6238.
- NPI
- 1588683890NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1850327479
- NPI enumeration date
- July 18, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (415) 379-7500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James K. Yan practices at Golden Gate Endoscopy Center in San Francisco, California
Dr. Yan's primary practice is Golden Gate Endoscopy Center, at 3370 Geary Boulevard, First Floor, San Francisco, CA 94118. The practice phone is (415) 379-7500.
- Golden Gate Endoscopy Center3370 Geary Boulevard, First Floor, San Francisco, CA 94118Phone(415) 379-7500
Source: Dmand AI Affiliation Data
Dr. James K. Yan is affiliated with 5 sites of care
Dr. Yan's primary practice is Golden Gate Endoscopy Center in San Francisco, California. Dr. Yan is also affiliated with California Pacific Medical Center Van Ness Campus. Dmand AI also links Dr. Yan to 2 more hospitals and 1 physician office, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. James K. Yan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Yan practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Golden Gate Endoscopy Center | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James K. Yan is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Yan's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Yan is board certified in 1992 - 2026 by the CA State License. Dr. Yan is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute gastroduodenitis, chronic indigestion, colonoscopy, gastroduodenitis, gastrointestinal bleeding, hemorrhoids and intestinal diverticulosis among the conditions Dr. Yan treats.
Gastroenterologists near Dr. Yan
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. James K. Yan billed Medicare for 276 services in 2024
CMS data shows 276 Medicare services from Dr. Yan across 7 procedure codes in 2024, for 96 Medicare patients. Medicare paid $21,550 for them.
Dr. Yan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1342024: 1294%
- Surgery
- 2023: 692024: 8219%
- Other services
- 2023: 542024: 6520%
Where Dr. Yan's Medicare services took place, 2024
- In an office12947%
- In a facility14753%
Dr. Yan compared with the California median for gastroenterologists, 2024
- Dr. Yan
- California median
- Medicare services
- 276vs 58653% below
- Medicare patients
- 96vs 30268% below
- Part D claims
- 2,175vs 3805.7 times
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Yan's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Yan and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James K. Yan treated 96 Medicare patients in 2024, average age 74
CMS counts 96 Medicare patients who saw Dr. Yan in 2024. The largest group is 65 to 74, with 58 patients. 75% of them have high cholesterol, and 73% have high blood pressure. Their average risk score is 1.01, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Yan's median patient age at 68, with 51% women.
Dr. Yan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Yan's Medicare patients by sex, 2024
- Women5456%
- Men4244%
Chronic conditions among Dr. Yan's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Arthritis42%
- Diabetes39%
- Chronic kidney disease22%
- Osteoporosis22%
- Mood disorders21%
- Depression18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Yan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women51%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James K. Yan wrote 2,277 Medicare Part D claims in 2024
In 2024, Dr. Yan wrote 2,277 Medicare Part D claims for 973 patients. 76% of them were for generic drugs. CMS names the drug for 2,175 of them, across 19 drugs with 11 or more claims each, at $766,031 in total drug cost. In 2023, CMS named 2,103 claims across 22 drugs.
Dr. Yan's Part D claims by kind of drug, 2024
- Generic1,735 claims76%
- Brand-name542 claims24%
Dr. Yan's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Yan's Part D claims, 2024
- Antibiotics4%98 of 2,277 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,1032024: 2,1753%
Drugs named by CMS: 19 in 2024, 22 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. James K. Yan ranks in the 98th percentile for colonoscopy in Medicare
Dr. Yan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 335 procedures of colonoscopy by Dr. Yan, more than 98% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Yan ranks in Medicare procedure volume
- Colonoscopy
- 98th percentile335 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 91st percentile210 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. James K. Yan received $22,610 in industry payments from 2016 to 2025
CMS Open Payments shows 422 general payments to Dr. Yan from 28 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 53% of the total. Gilead Sciences, Inc. paid the most, $14,812.
General payments to Dr. Yan by program year, 2016 to 2025
General payments to Dr. Yan by kind, 2016 to 2025
- Consulting fees$12,06453%
- Food and beverage$8,55138%
- Travel and lodging$1,4446%
- Honoraria$3602%
- Other$1911%
Companies that paid Dr. Yan the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James K. Yan graduated from WesternU College of Osteopathic Medicine of the Pacific
Dr. Yan graduated from WesternU College of Osteopathic Medicine of the Pacific in 1991.
- Medical school
- Board certified in 1992 - 2026
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. James K. Yan accepts plans from 10 insurance carriers
Dr. Yan is in network with 10 carriers, including Aetna, Elevance and Kaiser Permanente. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Kaiser Permanente
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- HCSC
- Humana
- Regence Health Plans
- +2 more carriersWith a free account
Plan types Dr. Yan accepts, by number of carriers
- Medicare8
- PPO7
- POS4
- EPO3
- HMO3
Source: Dmand AI Insurance Network Data
Sources for Dr. James K. Yan's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. James K. Yan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. James K. Yan's NPI number?
Dr. James K. Yan's NPI number is 1588683890. It was assigned on July 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. James K. Yan?
Dr. James K. Yan is a gastroenterologist in San Francisco, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. James K. Yan practice?
Dr. Yan practices at 3370 Geary Boulevard, First Floor, San Francisco, CA 94118. Dr. Yan's primary practice is Golden Gate Endoscopy Center in San Francisco, California. Dmand AI also links Dr. Yan to 2 hospitals and 1 physician office.
What is Dr. James K. Yan's office phone number?
The practice phone on file for Dr. Yan is (415) 379-7500.
What is Dr. James K. Yan's medical license number?
Dr. Yan holds California license 20AX6238.
Which hospitals is Dr. James K. Yan affiliated with?
Dr. Yan is affiliated with California Pacific Medical Center Van Ness Campus. Dmand AI links Dr. Yan to 2 more hospitals.
Does Dr. James K. Yan accept Medicare?
Yes. CMS data shows Dr. Yan billed Medicare for 276 services in 2024, and Dr. Yan accepts Medicare assignment.
How many Medicare patients does Dr. James K. Yan see?
CMS counts 96 Medicare patients who saw Dr. Yan in 2024, with an average age of 74.
Is Dr. James K. Yan board certified?
Yes. Dr. Yan is board certified in 1992 - 2026 by the CA State License.
What services does Dr. James K. Yan bill to Medicare?
In 2024, Dr. Yan's most billed Medicare services were office visit, established patient (99213), medicare service (G0500) and office visit, new patient (99203).
Show 5 more questionsShow fewer questions
Where did Dr. James K. Yan go to medical school?
Dr. Yan graduated from WesternU College of Osteopathic Medicine of the Pacific in 1991.
What drugs does Dr. James K. Yan prescribe most?
In 2024 Medicare Part D data, Dr. Yan's most prescribed drugs by claims were Gavilyte-C, Pantoprazole Sodium and Vemlidy.
Has Dr. James K. Yan received payments from drug or device companies?
CMS Open Payments shows $22,610 in general payments to Dr. Yan from 28 companies from 2016 to 2025. The largest total came from Gilead Sciences, Inc.
How long has Dr. James K. Yan been practicing?
Dr. Yan graduated from medical school in 1991, 35 years ago.
What insurance does Dr. James K. Yan accept?
Dr. Yan is in network with 10 carriers, including Aetna, Elevance and Kaiser Permanente. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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