DR. LYDIA HUI-LING CHAN M.D.
NPI 1578900452
Internal Medicine in San Francisco, CA

Q: What is Lydia Chan's NPI number?

The NPI number for Lydia Chan is 1578900452. It was assigned to this individual provider in the NPPES registry on May 31, 2013.

Q: What is Lydia Chan's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Lydia Chan was last updated on June 27, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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 May 31, 2013PECOS EnrolledAccepts Medicare Assignment

2674 SAN BRUNO AVENUE, SAN FRANCISCO, CA 94134(415) 750-5909(415) 750-5910 Get Directions Write a Review

NPPES record last updated: June 27, 2019. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 6, 2019, Aug 30, 2017, May 10, 2016 (3 updates tracked since 2016).

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About Dr. Lydia Hui-ling Chan M.d. NPPES

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

DR. LYDIA HUI-LING CHAN M.D. (NPI 1578900452) is an individual internal medicine provider in San Francisco, California, licensed in California (137928) and active in the NPI registry since May 2013. She is enrolled in Medicare PECOS and is a graduate of Other (2012).

NPPES Registry Identity

NPI1578900452

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameDR. LYDIA HUI-LING CHANCredential: M.D.

Location Address2674 SAN BRUNO AVENUESan Francisco, CA 94134

Mailing Address2674 San Bruno AvenueSan Francisco, CA 94134 · (415) 713-3807

Phone(415) 750-5909

Fax(415) 750-5910

Sole ProprietorYes

Medical School CMSOtherGraduated 2012

Enumeration DateMay 31, 2013

Last NPPES UpdateJune 27, 20193 updates tracked since enumeration

✔ NPI 1578900452 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in CA · 137928

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

2674 SAN BRUNO AVENUE, San Francisco, CA 94134

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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

Dr. Lydia Hui-ling Chan 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 ID1850680877

PECOS Enrollment IDI20160516000276

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 Lydia Chan reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

North East Medical Services

0.1 mi

Federally Qualified Health Center (FQHC)

2574 SAN BRUNO AVE
San Francisco, CA 94134

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

NPI 1326279852 (415) 391-9686

Galen Inpatient Physicians Inc

4.2 mi

Internal Medicine

450 STANYAN ST
San Francisco, CA 94117

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

NPI 1215391594 (415) 668-1000

San Francisco Unified Physicians Group, Inc.

4.7 mi

Hospitalist

845 JACKSON ST
San Francisco, CA 94133

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

NPI 1982104162 (415) 982-2400

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 16

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.

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

239 services132 patients

Hemoglobin a1c level 83036

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

157 services111 patients

Creatinine level to test for kidney function or muscle injury 82570

A creatinine level test measures the amount of creatinine in your blood. This substance is a waste product from normal muscle use. Higher levels can indicate possible kidney dysfunction or muscle injury. This test helps monitor kidney health.

155 services99 patients

Urine microalbumin (protein) level 82043

The urine microalbumin level test measures the amount of a protein called albumin in your urine. This test helps to detect early signs of kidney damage. High levels of albumin may suggest your kidneys aren't functioning properly. It's a simple, non-invasive test that involves providing a urine sample.

139 services97 patients

Blood test, lipids (cholesterol and triglycerides) 80061

A lipid panel is a blood test that measures fats and fatty substances, such as cholesterol and triglycerides. These substances are used by your body as a source of energy. High levels can lead to health issues, including heart disease.

113 services97 patients

Blood test, comprehensive group of blood chemicals 80053

A comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.

108 services94 patients

Blood test, thyroid stimulating hormone (tsh) 84443

A TSH blood test measures the level of thyroid stimulating hormone in your body. This hormone is produced by the pituitary gland and regulates how your thyroid works. It's a simple procedure where a small amount of blood is drawn from your arm for analysis.

95 services85 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count 85025

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

91 services82 patients

Manual urinalysis test with examination using microscope, automated 81001

A manual urinalysis test with automated microscopic examination is a lab process that checks your urine for health indicators. It involves a machine scanning your sample to identify any abnormal elements, which can assist in diagnosing various conditions.

85 services77 patients

Vitamin d-3 level 82306

A Vitamin D-3 level test measures the amount of Vitamin D-3, a crucial nutrient, in your body. This test helps identify if your levels are too low or too high. Low levels may lead to bone weakness, while high levels could harm your kidneys. It's a simple blood test.

68 services63 patients

Thyroxine (thyroid chemical), free 84439

The Thyroxine (thyroid chemical), free test is a blood test that measures the level of free T4 in your body. T4 is a hormone produced by your thyroid gland and is essential for growth and metabolism. If your T4 levels are too high or too low, it could indicate a thyroid disorder.

33 services30 patients

Colorectal cancer screening; fecal occult blood test, immunoassay, 1-3 simultaneous G0328

A fecal occult blood test is a screening tool for colorectal cancer. It checks for tiny amounts of blood in your stool that can't be seen with the naked eye. The immunoassay method can test 1-3 samples at once. This helps detect cancer early, when treatment is most effective.

33 services33 patients

Blood test, basic group of blood chemicals (calcium, total) 80048

A basic group blood test measures the levels of certain chemicals in your blood, including calcium. This helps assess your overall health and detect potential problems. The procedure involves drawing a small amount of blood from your arm, which is then analyzed in a lab.

27 services23 patients

Urine sodium level 84300

A urine sodium level test measures the amount of sodium in your urine. Sodium is a key element that helps regulate water balance in your body. This test helps assess how your kidneys are functioning and can identify potential health issues.

17 services13 patients

Uric acid level, blood 84550

A blood uric acid level test measures the amount of uric acid in your blood. Uric acid is a waste product that your body produces when it breaks down purines, substances found in your body and in certain foods. High levels may lead to gout or kidney stones.

12 services12 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test 85027

A complete blood cell count (CBC) is an automated test that measures different components of the blood, including red cells, white cells, and platelets. It helps assess overall health, detect disorders like anemia or infection, and monitor medical treatments.

12 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94134 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.

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 Lydia Chan's NPI number?

The NPI number for Lydia Chan is 1578900452. It was assigned to this individual provider in the NPPES registry on May 31, 2013.

Where is Lydia Chan located?

Lydia Chan practices at 2674 San Bruno Avenue, San Francisco, CA 94134. The listed phone number is (415) 750-5909.

What is Lydia Chan's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Lydia Chan enrolled in Medicare?

Yes. Lydia Chan 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 Lydia Chan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lydia Chan reassigns Medicare benefits to 3 organizations: North East Medical Services (San Francisco, CA), Galen Inpatient Physicians Inc (San Francisco, CA) and San Francisco Unified Physicians Group, Inc. (San Francisco, 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 Lydia Chan'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 Lydia Chan was last updated on June 27, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.