JAMES MARK LIN M.D.
NPI 1396864872
Internal Medicine - Gastroenterology in Pleasanton, CA

Q: What is James Lin's NPI number?

The NPI number for James Lin is 1396864872. It was assigned to this individual provider in the NPPES registry on March 28, 2007.

Q: What is James Lin's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for James Lin was last updated on April 12, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 28, 2007PECOS EnrolledAccepts Medicare Assignment

5565 W LAS POSITAS BLVD STE 200, PLEASANTON, CA 94588(650) 736-5555 Get Directions Write a Review

NPPES record last updated: April 12, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 12, 2024, Oct 27, 2023, Dec 10, 2015 (3 updates tracked since 2015).

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About James Mark Lin M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JAMES MARK LIN M.D. (NPI 1396864872) is an individual gastroenterology provider in Pleasanton, California, licensed in California (A102814) and active in the NPI registry since March 2007. He is enrolled in Medicare PECOS, maintains a secondary practice location in Pleasanton, and is a graduate of Vanderbilt University School Of Medicine (2005).

NPPES Registry Identity

NPI1396864872

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameJAMES MARK LINCredential: M.D.

Location Address5565 W LAS POSITAS BLVD STE 200Pleasanton, CA 94588-5806

Mailing Address5565 W Las Positas Blvd Ste 200Pleasanton, CA 94588-5806 · (650) 736-5555

Phone(650) 736-5555

Sole ProprietorNo

Medical School CMSVanderbilt University School Of MedicineGraduated 2005

Enumeration DateMarch 28, 2007

Last NPPES UpdateApril 12, 20243 updates tracked since enumeration

NPPES CertifiedApril 12, 2024

✔ NPI 1396864872 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in CA · A102814

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

5565 W LAS POSITAS BLVD STE 200, Pleasanton, CA 94588

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Secondary Practice Location 1

Location 15575 W Las Positas Blvd Ste 130Pleasanton, CA 94588-5800 · Phone (925) 463-0590

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

James Mark Lin M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4981872991

PECOS Enrollment IDI20110719000134

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show James Lin reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Stanford Health Care

0.5 mi

Radiation Oncology

5725 W LAS POSITAS BLVD, SUITE 100B
Pleasanton, CA 94588

Reassigned Medicare billing, California enrollment
4,258 clinicians in this Medicare group

NPI 1124561758 (650) 723-4000

University Healthcare Alliance

15 mi

Internal Medicine

7999 GATEWAY BLVD STE 200
Newark, CA 94560

Reassigned Medicare billing, California enrollment
435 clinicians in this Medicare group

NPI 1760531198 (888) 924-1036

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 14

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

292 services197 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

155 services155 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

144 services142 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

115 services115 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

101 services92 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

67 services67 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

56 services54 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

45 services45 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

31 services31 patients

Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm 43249

This procedure involves using a flexible tube with a camera, called an endoscope, to gently expand narrowed areas in your esophagus, stomach, or upper small bowel. A small balloon is inflated, making it easier for food and liquid to pass through. It's safe and effective.

30 services29 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

27 services21 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

25 services25 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

24 services24 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

22 services21 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94588 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$153.83 typical visit price

range $69.00 – $202.35

Typical copayment $38.45 (range $17.25 – $50.58)

Most-billed visit code 99204

Established Patient

$119.48 typical visit price

range $23.44 – $166.46

Typical copayment $29.87 (range $5.86 – $41.61)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Enteral feeding supply kit; syringe fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4034

Other-Enteral and Parenteral · category OB006N

4 suppliers15 claims450 services$1.98 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BETTINA ZATUCHNI MD A PROFESSIONAL CORPORATION

Obstetrics & Gynecology (Gynecology)

5565 W LAS POSITAS BLVD STE 200
PLEASANTON, CA 94588

Alameda County (925) 251-1010

GABRIELLE S SCHAEFER MD PSC

Obstetrics & Gynecology (Gynecology)

5565 W LAS POSITAS BLVD STE 200
PLEASANTON, CA 94588

Alameda County (925) 251-1010

SONIA SANTANA DO A PROFESSIONAL CORPORATION

Obstetrics & Gynecology (Gynecology)

5565 W LAS POSITAS BLVD STE 200
PLEASANTON, CA 94588

Alameda County (925) 251-1010

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is James Lin's NPI number?

The NPI number for James Lin is 1396864872. It was assigned to this individual provider in the NPPES registry on March 28, 2007.

Where is James Lin located?

James Lin practices at 5565 W Las Positas Blvd Ste 200, Pleasanton, CA 94588. The listed phone number is (650) 736-5555.

What is James Lin's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is James Lin enrolled in Medicare?

Yes. James Lin is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for James Lin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), James Lin reassigns Medicare benefits to 2 organizations: Stanford Health Care (Pleasanton, CA) and University Healthcare Alliance (Newark, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for James Lin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for James Lin was last updated on April 12, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.