William Shun Tzeng, MD
William Shun Tzeng is an Internal Medicine specialist based in Hacienda Heights, CA with over 6 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
William Shun Tzeng, MD specializes in internal medicine, serving patients in Hacienda Heights, CA in group practice. A Washington University School of Medicine graduate since 2020, he brings 6+ years of experience. A physician who provides long-term, comprehensive care in the office and the hospital.
Older · 262dNPPES updated 2025-09-03 · verify NPI on CMS · Verify license at Medical Board of California
Contact & Location
Practice Location
17170 Colima Rd Ste G, Hacienda Heights, CA 91745-6771
How Does This Doctor Compare?
MIPS Score
202346.94/100
California avg: 78.6 · US avg: 83.6
⚠ Lower than most doctors nationally(-36.7 pts)
How the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Prescription Recipients
14
Patients prescribed
Prescriptions Written
21
Total claims
Total Medicare drug cost: $8k
Percentile rankings compared against 9,360 reporting peers in California.
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.
$1.0k received from industry
36 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 William Shun Tzeng's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 2020
Washington University School of Medicine in St. Louis
Board certified · Sep 2, 2025
Self-reported via NPPES
6 years in practice
Established
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
Washington University School of Medicine (Class of 2020)
Virtual Internal Medicine Care With William Shun Tzeng
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with William Shun Tzeng for follow-ups, medication reviews, and ongoing care — no travel to Hacienda Heights 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 William Shun Tzeng
Dr. Tzeng is listed as active in the NPI registry with telehealth listed in Hacienda Heights, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (626) 965-8202.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Open Payments 2024. See Data Methodology.
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Contact William Shun Tzeng
Practice Location
17170 Colima Rd Ste G, Hacienda Heights, CA 91745-6771
Mailing Address
17170 Colima Rd Ste G, Hacienda Heights, CA 91745-6771
This is a provider directory. Contact the office directly to schedule appointments.
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