Susan J. Yoon, DO

Medicare activity in 2024

Official CMS public-use data for Susan J. Yoon, 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. Screening mammography (77067)453 services
2. Screening 3d breast mammography (77063)450 services
3. Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066) (G0279)156 services
4. Diagnostic mammography of 1 breast (77065)115 services
5. Limited ultrasound scan of 1 breast (76642)108 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 cholesterol75%
• High blood pressure66%
• Arthritis55%
• Osteoporosis33%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)26%
• Diabetes25%

Hospitals where Susan J. Yoon works

Medicare's Facility Affiliation Data lists Susan J. Yoon 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.

• Providence St. Jude Medical CenterFullerton, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050168

Practice locations

Addresses where Susan J. Yoon is enrolled with Medicare (CMS data updated October 2, 2026).

• 101 E Valencia Mesa DrFullerton, CA 92835

Group practices

Medicare enrollment lists Susan J. Yoon as a member of this group (CMS data updated October 2, 2026).

• St Jude Radiology Medical Group Inc61 clinicians in the group

Specialties

• Diagnostic Radiologyprimary

Find other Diagnostic Radiology doctors in California →

Other radiologists in Fullerton

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

• Tamra Baldauf, MD
• Hamza Rahimi, MD
• Jayshree Sampat, MD
• Brian Tzung, MD
• Chau Q. Huynh, MD
• Brenna A. Chalmers, MD
• Alfred K. Sein, MD
• Medhat Hanna, MD

All radiologists in Fullerton →

Other clinicians in St Jude Radiology Medical Group Inc

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

• Tamra Baldauf, MD
• Hamza Rahimi, MD
• Timmy M. Joseph, MD
• Brian Tzung, MD
• Joseph Y. Young, MD
• Brenna A. Chalmers, 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