Andy Tiewen Chang, MD
Andy Tiewen Chang is a Family Medicine specialist based in Fremont, CA with over 27 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
With over 27 years in family medicine, Andy Tiewen Chang, MD is a long-established family medicine physician in Fremont. Trained at University of Southern California Keck School of Medicine (class of 1999), he has been practicing for over 27 years. Among his Medicare patients, common conditions include high cholesterol, hypertension, and diabetes (per CMS data).
Older · 2272dNPPES updated 2020-03-04 · verify NPI on CMS · Verify license at Medical Board of California
Contact & Location
Practice Location
3200 Kearney St, Fremont, CA 94538-2299
How Does This Doctor Compare?
Medicare Patients
190
Unique beneficiaries
Standard volumePrescription Recipients
184
Patients prescribed
Prescriptions Written
1,244
Total claims
Total Medicare drug cost: $66k
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 High Cholesterol, Hypertension, and Diabetes.
Elevated cholesterol or triglycerides that increase heart disease risk
High blood pressure — a leading risk factor for heart disease and stroke
A condition where the body cannot properly regulate blood sugar levels
Joint inflammation causing pain, swelling, and stiffness
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$162 received from industry
7 transactions reported in 2024 ·Low 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 Andy Tiewen Chang's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1999
Keck School of Medicine of Usc
Board certified · Mar 3, 2020
Self-reported via NPPES
27 years in practice
Experienced
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Taxonomy: 207Q00000X
Education & Training
University of Southern California Keck School of Medicine (Class of 1999)
Mailing address
325 Distel Cir, Los Altos, CA 94022-1408
Differs from practice location
Virtual Family Medicine Care With Andy Tiewen Chang
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Andy Tiewen Chang for cholesterol management, blood pressure monitoring, diabetes check-ins — no travel to Fremont 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 Andy Tiewen Chang
Dr. Chang is listed as active in the NPI registry with telehealth listed in Fremont, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (510) 490-1222.
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 Andy Tiewen Chang
Practice Location
3200 Kearney St, Fremont, CA 94538-2299
Mailing Address
325 Distel Cir, Los Altos, CA 94022-1408
This is a provider directory. Contact the office directly to schedule appointments.
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