MIMI LIN M.D.
NPI 1659588457
Internal Medicine - Gastroenterology in San Francisco, CA

Q: What is Mimi Lin's NPI number?

The NPI number for Mimi Lin is 1659588457. It was assigned to this individual provider in the NPPES registry on May 17, 2007.

Q: What is Mimi 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 Mimi Lin was last updated on November 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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 May 17, 2007PECOS EnrolledAccepts Medicare Assignment

1100 VAN NESS AVE FL 5, SAN FRANCISCO, CA 94109(415) 600-1000(415) 375-4825 Get Directions Write a Review

NPPES record last updated: November 10, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 10, 2025, Oct 18, 2019 (2 updates tracked since 2019).

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About Mimi Lin M.d. NPPES

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

MIMI LIN M.D. (NPI 1659588457) is an individual gastroenterology provider in San Francisco, California, licensed in California (A85457) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Albert Einstein College Of Medicine Of Yeshiva University (2002).

NPPES Registry Identity

NPI1659588457

Entity TypeIndividualFemale

Primary Taxonomy207RG0100X

Provider Legal NameMIMI LINCredential: M.D.

Location Address1100 VAN NESS AVE FL 5San Francisco, CA 94109

Mailing Address325 Distel CirLos Altos, CA 94022-1408 · (415) 600-1000 · Fax (415) 375-4825

Phone(415) 600-1000

Fax(415) 375-4825

Sole ProprietorNo

Medical School CMSAlbert Einstein College Of Medicine Of Yeshiva UniversityGraduated 2002

Enumeration DateMay 17, 2007

Last NPPES UpdateNovember 10, 20252 updates tracked since enumeration

NPPES CertifiedNovember 10, 2025

✔ NPI 1659588457 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 · A85457

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.

1100 VAN NESS AVE FL 5, San Francisco, CA 94109

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Secondary Practice Locations 2

Location 1900 Welch Rd, Suite 202Palo Alto, CA 94304-1805 · Phone (650) 324-8878

Location 2899 Valencia StSan Francisco, CA 94110-1736 · Phone (415) 600-1138 · Fax (415) 600-1122

Other Identifiers 1

OtherA85457CA · State Medical License

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

Mimi 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 ID1355488008

PECOS Enrollment IDI20091028000686

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

Sutter Bay Medical Foundation

15 mi

Multi-Specialty

12 CAMINO ENCINAS
Orinda, CA 94563

Reassigned Medicare billing, California enrollment
4,479 clinicians in this Medicare group

NPI 1366898538 (510) 204-8180

County Of San Mateo

19 mi

Multi-Specialty

222 W 39TH AVE
San Mateo, CA 94403

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

NPI 1831268580 (650) 573-3702

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 20

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.

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.

110 services107 patients

Monitoring and recording of esophageal function through nasal tube with electrode 91037

This procedure involves placing a thin tube with an electrode through your nose and into your esophagus. It helps to monitor and record the function of your esophagus, aiding in diagnosing any potential issues.

66 services62 patients

Study of esophagus to assess movement 91010

This procedure, known as esophageal manometry, involves studying the esophagus or food pipe to evaluate its movement and pressure. It helps understand how well the esophagus can move food to the stomach. Involving a thin, flexible tube, it's a safe, minimally invasive test.

65 services62 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.

64 services64 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.

59 services49 patients

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.

46 services39 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.

44 services44 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.

39 services39 patients

Study of esophageal sensation by balloon distension 91040

This procedure involves inflating a small balloon in the esophagus, the tube connecting your mouth to your stomach. It helps doctors understand how your esophagus responds to pressure changes, aiding in the diagnosis of certain digestive disorders.

38 services38 patients

Test for tone and sensation of rectum and anus 91120

This procedure checks the health of the lower digestive tract. The doctor gently examines the area to assess its muscle strength and sensitivity. This helps in detecting any abnormal conditions. It's a standard, safe procedure with minimal discomfort.

35 services35 patients

Study of rectum sensitivity and function 91122

This procedure examines the rectum's sensitivity and functionality. It involves a small, soft balloon inserted into the rectum and inflated to various degrees. The goal is to assess how well your rectum can sense and respond to different volumes. It's a crucial test for diagnosing certain digestive issues.

35 services35 patients

Injection of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43236

This procedure involves a flexible tube, called an endoscope, which is passed through your mouth to examine your esophagus, stomach, and upper small bowel. A special needle is used to inject medication or other substances directly into these areas.

31 services27 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.

26 services26 patients

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

24 services24 patients

Ultrasound exam of lower large bowel using a flexible endoscope 45341

An ultrasound exam of the lower large bowel involves inserting a thin, flexible tube with a small ultrasound device at its tip into the bowel. This allows for detailed images of the bowel wall and nearby structures, which helps in diagnosing various conditions.

17 services17 patients

Dilation of stomach outlet using a flexible endoscope 43245

This procedure involves expanding the opening of the stomach using a flexible tube with a light, called an endoscope. It helps improve food passage from the stomach to the small intestine. It's performed under sedation for patient comfort.

15 services15 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.

15 services15 patients

Monitoring and recording of esophageal function through a capsule attached to the esophagus wall 91035

This procedure involves a small capsule being attached to your esophagus wall. It measures and records how your esophagus is functioning, helping to identify any potential issues. You won't feel the capsule and it will pass naturally through your system after a few days.

14 services14 patients

Control of bleeding of small bowel using an endoscope 44378

This procedure involves using an endoscope, a thin tube with a light and camera, to view the small bowel and identify any bleeding areas. Special tools within the endoscope can then stop the bleeding by applying heat, clips, or medication.

13 services13 patients

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

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94109 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.

Other Providers at the Same Location NPPES 16

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

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