Samuel W. Chung Jr., MD

Medicare activity in 2024

Official CMS public-use data for Samuel W. Chung Jr., data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Injection, oxaliplatin, 0.5 mg (J9263)21,200 services
2. Injection, pembrolizumab, 1 mg (J9271)16,400 services
3. Injection, aprepitant, 1 mg (J0185)12,610 services
4. Injection, paclitaxel, 1 mg (J9267)6,279 services
5. Injection, denosumab, 1 mg (J0897)4,500 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High blood pressure75%
• High cholesterol75%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)53%
• Arthritis45%
• Diabetes40%
• Chronic kidney disease36%

Hospitals where Samuel W. Chung Jr. works

Medicare's Facility Affiliation Data lists Samuel W. Chung Jr. at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Huntington HospitalPasadena, CA · Acute Care Hospital · Emergency services: listed by Medicare · CCN 050438
• USC Arcadia HospitalArcadia, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050238

Practice locations

Addresses where Samuel W. Chung Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

• 1500 Duarte RdDuarte, CA 91010 (626) 256‑4673
• 1500 E Duarte RdDuarte, CA 91010
• 209 Fair Oaks AveSouth Pasadena, CA 91030 (626) 396‑2900
• 23823 Valencia Blvd, Suite 250Santa Clarita, CA 91355 (626) 775‑3200
• 301 W Huntington Dr, Suite 400Arcadia, CA 91007 (626) 218‑9840

Group practices

Medicare enrollment lists Samuel W. Chung Jr. as a member of this group (CMS data updated October 2, 2026).

• City of Hope Medical Foundation982 clinicians in the group

Specialties

• Medical Oncologyprimary
• Hematologyalso

Find other Medical Oncology doctors in California →

Other oncologists in Duarte

Clinicians with the same Medicare primary specialty in Duarte, CA — not a recommendation.

• Leah Naghi, MD
• Jana L. Portnow, MD
• Thanhnga T. Doan, MD
• Ramya R. Muddasani, DO
• Yan Xing, MD
• Alexander Krule
• Lauren J. Antrim, MD
• Lee Cranmer, MD

All oncologists in Duarte →

Other clinicians in City of Hope Medical Foundation

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Kevin G. Chan, MD
• Jeffrey S. Yoshida, MD
• Rania M. Bakkar, MD
• Joseph W. Carlson, MD
• Marissa J. Tadi, NP
• Janet M. Hocko, MD

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians