Dr. James Mark Lin, MD
- Medicare services, 2024
- 1,178
- Medicare patients, 2024
- 590
- Part D claims, 2024
- 1,974
- Hospital affiliations
- 2
- Industry payments
- $3,033
- Practice address
- 5565 W Las Positas Blvd, Pleasanton, CA 94588
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Stanford Care Digestive Health Center of Pleasanton - HOPD
Acute Care Hospital outpatient department · Pleasanton, California
Find Dr. Lin's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. James Mark Lin is a gastroenterologist in Pleasanton, California
Dr. Lin practices at Stanford Care Digestive Health Center of Pleasanton - HOPD in Pleasanton, California.
Dr. Lin's NPI, 1396864872, was assigned on March 28, 2007. Dr. Lin graduated from Vanderbilt University School Of Medicine in 2005. Dr. Lin holds California license A102814.
- NPI
- 1396864872NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4981872991
- NPI enumeration date
- March 28, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James Mark Lin practices at Stanford Care Digestive Health Center of Pleasanton - HOPD in Pleasanton, California
Dr. Lin's primary practice is Stanford Care Digestive Health Center of Pleasanton - HOPD, at 5565 W Las Positas Blvd, Pleasanton, CA 94588.
- Stanford Care Digestive Health Center of Pleasanton - HOPD5565 W Las Positas Blvd, Pleasanton, CA 94588
Source: Dmand AI Affiliation Data
Dr. James Mark Lin is affiliated with 6 sites of care and 3 medical groups
Dr. Lin's primary practice is Stanford Care Digestive Health Center of Pleasanton - HOPD in Pleasanton, California. Dr. Lin is also affiliated with Stanford Health Care Tri-Valley. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Lin to 1 more hospital, 3 group practices and clinics and 2 medical groups, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. James Mark Lin's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lin practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stanford Care Digestive Health Center of Pleasanton - HOPD | Available with a free account |
| +5 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James Mark Lin is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Lin's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Lin is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Lin is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute gastroduodenitis, chronic inflammatory bowel disease (IBD), cirrhosis of the liver, colonoscopy, fatty liver, gastroduodenitis and gastroenteritis among the conditions Dr. Lin treats.
Gastroenterologists near Dr. Lin
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 Mark Lin billed Medicare for 1,178 services in 2024
CMS data shows 1,178 Medicare services from Dr. Lin across 15 procedure codes in 2024, for 590 Medicare patients. Medicare paid $146,215 for them.
Dr. Lin's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6222024: 72316%
- Surgery
- 2023: 2512024: 35642%
- Other services
- 2023: 902024: 9910%
Where Dr. Lin's Medicare services took place, 2024
- In an office71861%
- In a facility46039%
Dr. Lin compared with the California median for gastroenterologists, 2024
- Dr. Lin
- California median
- Medicare services
- 1,178vs 5862.0 times
- Medicare patients
- 590vs 30295% above
- Part D claims
- 1,765vs 3804.6 times
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Lin'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. Lin and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James Mark Lin treated 590 Medicare patients in 2024, average age 74
CMS counts 590 Medicare patients who saw Dr. Lin in 2024. The largest group is 65 to 74, with 248 patients. 75% of them have high cholesterol, and 73% have high blood pressure. 22% are also on Medicaid. Their average risk score is 1.40, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Lin's median patient age at 61, with 52% women.
Dr. Lin's Medicare patients by age, 2024
Dr. Lin's Medicare patients by sex, 2024
- Women32355%
- Men26745%
Chronic conditions among Dr. Lin's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Arthritis43%
- Chronic kidney disease33%
- Diabetes31%
- Ischemic heart disease29%
- Anxiety24%
- Osteoporosis24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lin's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women52%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James Mark Lin wrote 1,974 Medicare Part D claims in 2024
In 2024, Dr. Lin wrote 1,974 Medicare Part D claims for 670 patients. 75% of them were for generic drugs. CMS names the drug for 1,765 of them, across 30 drugs with 11 or more claims each, at $747,008 in total drug cost. In 2023, CMS named 1,520 claims across 26 drugs.
Dr. Lin's Part D claims by kind of drug, 2024
- Generic1,478 claims75%
- Brand-name496 claims25%
Dr. Lin'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. Lin's Part D claims, 2024
- Antibiotics8%160 of 1,974 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: 1,5202024: 1,76516%
Drugs named by CMS: 30 in 2024, 26 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 Mark Lin ranks in the 87th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Lin accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Lin as offering telehealth. CMS counts 164 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Lin, more than 87% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Lin ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 87th percentile164 procedures
- Colonoscopy
- 77th percentile88 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 Mark Lin received $3,033 in industry payments from 2016 to 2025
CMS Open Payments shows 103 general payments to Dr. Lin from 15 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 86% of the total. Creo Medical Inc. paid the most, $1,522.
General payments to Dr. Lin by program year, 2016 to 2025
General payments to Dr. Lin by kind, 2016 to 2025
- Food and beverage$2,59486%
- Travel and lodging$36512%
- Education$742%
Companies that paid Dr. Lin 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 Mark Lin has 1 award and honors on record
Dmand AI lists 1 award for Dr. Lin, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Lin
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. James Mark Lin graduated from Vanderbilt University School Of Medicine
Dr. Lin graduated from Vanderbilt University School Of Medicine in 2005. Dr. Lin is a member of ACG.
- Medical school
- Board certified in gastroenterology
Source: Dmand AI Professional Profile Data
Dr. James Mark Lin accepts plans from 7 insurance carriers
Dr. Lin is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- Elevance
- HCSC
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
Plan types Dr. Lin accepts, by number of carriers
- PPO5
- Medicare4
- EPO3
- HMO2
- POS2
Source: Dmand AI Insurance Network Data
Sources for Dr. James Mark Lin'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 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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 Mark Lin
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 Mark Lin's NPI number?
Dr. James Mark Lin's NPI number is 1396864872. It was assigned on March 28, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. James Mark Lin?
Dr. James Mark Lin is a gastroenterologist in Pleasanton, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. James Mark Lin practice?
Dr. Lin practices at 5565 W Las Positas Blvd, Pleasanton, CA 94588. Dr. Lin's primary practice is Stanford Care Digestive Health Center of Pleasanton - HOPD in Pleasanton, California. Dmand AI also links Dr. Lin to 1 hospital, 3 group practices and clinics and 2 medical groups.
What is Dr. James Mark Lin's medical license number?
Dr. Lin holds California license A102814.
Which hospitals is Dr. James Mark Lin affiliated with?
Dr. Lin is affiliated with Stanford Health Care Tri-Valley. Dmand AI links Dr. Lin to 1 more hospital.
What medical group is Dr. James Mark Lin part of?
Dr. Lin is linked to Stanford Health Care. Dmand AI links Dr. Lin to 2 more medical groups.
Does Dr. James Mark Lin accept Medicare?
Yes. CMS data shows Dr. Lin billed Medicare for 1,178 services in 2024, and Dr. Lin accepts Medicare assignment.
Does Dr. James Mark Lin offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Lin as offering telehealth services.
How many Medicare patients does Dr. James Mark Lin see?
CMS counts 590 Medicare patients who saw Dr. Lin in 2024, with an average age of 74.
Is Dr. James Mark Lin board certified?
Yes. Dr. Lin is board certified in gastroenterology by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. James Mark Lin bill to Medicare?
In 2024, Dr. Lin's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99204) and surgery: digestive system (43239).
Where did Dr. James Mark Lin go to medical school?
Dr. Lin graduated from Vanderbilt University School Of Medicine in 2005.
What drugs does Dr. James Mark Lin prescribe most?
In 2024 Medicare Part D data, Dr. Lin's most prescribed drugs by claims were Pantoprazole Sodium, Sod Sulf-Potass Sulf-Mag Sulf and Colesevelam HCl.
Has Dr. James Mark Lin received payments from drug or device companies?
CMS Open Payments shows $3,033 in general payments to Dr. Lin from 15 companies from 2016 to 2025. The largest total came from Creo Medical Inc.
How long has Dr. James Mark Lin been practicing?
Dr. Lin graduated from medical school in 2005, 21 years ago.
What insurance does Dr. James Mark Lin accept?
Dr. Lin is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 5. Check the plan with the practice before a visit.
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