Dr. James Mark Lin, MD

  • Pleasanton, CA
  • Gastroenterologist
NPI1396864872PAC ID4981872991
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
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Personal email
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Mobile number
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Social profiles

Primary practice

Stanford Care Digestive Health Center of Pleasanton - HOPD

Acute Care Hospital outpatient department · Pleasanton, California

See all 9 affiliations

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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 and contact details
Medicare PAC ID
4981872991
NPI enumeration date
March 28, 2007
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Professional email
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Personal email
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Mobile number
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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 - HOPD
    5565 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.

See all 9 affiliations for Dr. Lin

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.

EHR by site
SiteEHR vendor and product
Stanford Care Digestive Health Center of Pleasanton - HOPDAvailable with a free account
+5 more sites and 2 medical groupsAvailable 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, CaliforniaPrimaryLicense A102814 · 2008 to 2027 · taxonomy 207RG0100X

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.

Medicare services, 20241,178
Medicare patients590
Paid by Medicare$146,215
Procedure codes15

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.

See all procedures by Dr. Lin

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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.

Medicare patients, 2024590
Average age74
Average risk score1.40
Also on Medicaid22%

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

  1. High cholesterol75%
  2. High blood pressure73%
  3. Arthritis43%
  4. Chronic kidney disease33%
  5. Diabetes31%
  6. Ischemic heart disease29%
  7. Anxiety24%
  8. 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.

Part D claims, 20241,974
Drugs named by CMS30
Total drug cost$747,008
Part D patients670

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.

See all prescribing by Dr. Lin

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

$3Kin total
  • 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.

See all payments to Dr. Lin

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

  1. 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.

  1. Medical schoolVanderbilt University School Of Medicine
  2. Board certified in gastroenterologyAmerican Board of Internal Medicine

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

  1. PPO5
  2. Medicare4
  3. EPO3
  4. HMO2
  5. POS2

Source: Dmand AI Insurance Network Data

Sources for Dr. James Mark Lin's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand 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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