Gwendolen Chang, M.D.
Gwendolen Chang is an Internal Medicine specialist based in San Leandro, CA with over 19 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Gwendolen Chang, M.D. specializes in internal medicine, serving patients in San Leandro, CA in group practice. A Stanford University School of Medicine graduate since 2007, she brings 19+ years of experience. She regularly sees Medicare patients with hypertension, high cholesterol, and kidney disease (per CMS claims data).
Older · 4553dNPPES updated 2013-12-04 · verify NPI on CMS · Verify license at Medical Board of California
Contact & Location
Practice Location
13851 E 14th St Ste 206, San Leandro, CA 94578-2627
How Does This Doctor Compare?
Medicare Patients
465
Unique beneficiaries
Standard volumePrescription Recipients
204
Patients prescribed
Prescriptions Written
1,647
Total claims
Total Medicare drug cost: $1.56M
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and Chronic Kidney Disease.
High blood pressure — a leading risk factor for heart disease and stroke
Elevated cholesterol or triglycerides that increase heart disease risk
Gradual loss of kidney function over time, often linked to diabetes or hypertension
A condition where the body cannot properly regulate blood sugar levels
The heart cannot pump blood efficiently enough to meet the body's needs
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
Joint inflammation causing pain, swelling, and stiffness
An irregular, often rapid heartbeat that increases the risk of stroke
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$1.3k received from industry
53 transactions reported in 2024 ·Moderate tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Gwendolen Chang's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 2007
Stanford University School of Medicine
19 years in practice
Experienced
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.
Taxonomy: 207R00000X
Education & Training
Stanford University School of Medicine (Class of 2007)
Primary hospital affiliation: Psychiatric
CMS Certification Number: 194087
View hospital on Medicare Care CompareVirtual Internal Medicine Care With Gwendolen Chang
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Gwendolen Chang for blood pressure monitoring, cholesterol management, kidney care follow-ups — no travel to San Leandro required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Gwendolen Chang
NPI records show Dr. Chang as active with telehealth listed in San Leandro, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (510) 351-9373.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Gwendolen Chang
Practice Location
13851 E 14th St Ste 206, San Leandro, CA 94578-2627
Mailing Address
13851 E 14th St Ste 206, San Leandro, CA 94578-2627
This is a provider directory. Contact the office directly to schedule appointments.
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