Gene-Yuan Chang, MD
Gene-Yuan Chang is a Nephrology Internal Medicine specialist based in Castro Valley, CA with over 17 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Gene-Yuan Chang, MD has been part of the Castro Valley medical community since 2011 in group practice. He graduated from Boston University School of Medicine in 2009 and has 17+ years of clinical experience. Among his Medicare patients, common conditions include hypertension, high cholesterol, and kidney disease (per CMS data).
Older · 393dNPPES updated 2025-04-25 · verify NPI on CMS · Verify license at Medical Board of California
How Does This Doctor Compare?
Medicare Patients
493
Unique beneficiaries
Standard volumePrescription Recipients
193
Patients prescribed
Prescriptions Written
1,671
Total claims
Total Medicare drug cost: $353k
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.
$711 received from industry
30 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 Gene-Yuan Chang's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 2009
Boston University Chobanian & Avedisian School of Medicine
Board certified · Apr 24, 2025
Self-reported via NPPES
17 years in practice
Experienced
Nephrologists treat kidney diseases including chronic kidney disease, kidney failure requiring dialysis, glomerulonephritis, kidney stones, and electrolyte disorders. They manage dialysis access and kidney transplant follow-up.
Taxonomy: 207RN0300X
Education & Training
Boston University School of Medicine (Class of 2009)
Primary hospital affiliation: Psychiatric
CMS Certification Number: 194087
View hospital on Medicare Care CompareVirtual Internal Medicine Care With Gene-Yuan Chang
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Gene-Yuan Chang for blood pressure monitoring, cholesterol management, kidney care follow-ups — no travel to Castro Valley 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 Gene-Yuan Chang
NPI records show Dr. Chang as active with telehealth listed in Castro Valley, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (510) 881-1490.
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 Gene-Yuan Chang
Practice Location
19850 Lake Chabot Rd, Castro Valley, CA 94546-4002
Mailing Address
19850 Lake Chabot Rd, Castro Valley, CA 94546-4002
This is a provider directory. Contact the office directly to schedule appointments.
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