Amber F. Hsiao, MD

Medicare activity in 2024

Official CMS public-use data for Amber F. Hsiao, 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. Complete ultrasound scan of abdomen (76700)230 services
2. X-ray of chest, 2 views (71046)190 services
3. Limited ultrasound scan behind abdominal cavity (76775)122 services
4. Limited ultrasound scan of joint or other extremity structure except blood vessels (76882)91 services
5. Ultrasound of both sides of head and neck blood flow (93880)89 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%
• Arthritis56%
• Diabetes35%
• Chronic kidney disease32%
• Ischemic heart disease26%

Hospitals where Amber F. Hsiao works

Medicare's Facility Affiliation Data lists Amber F. Hsiao 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 Amber F. Hsiao is enrolled with Medicare (CMS data updated October 2, 2026).

• 101 E Valencia Mesa DrFullerton, CA 92835
• 4300 Rose DrYorba Linda, CA 92886

Group practices

Medicare enrollment lists Amber F. Hsiao 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.

• Ralph T. Marcus, MD
• Ajita Deodhar, MD
• Susan J. Yoon, DO
• Hamza Rahimi, MD
• Brian Tzung, MD
• Hao Q. Ngo, MD
• Eva Xia, MD
• Tamra Baldauf, 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.

• Ralph T. Marcus, MD
• Ajita Deodhar, MD
• Susan J. Yoon, DO
• Hamza Rahimi, MD
• Brian Tzung, MD
• Hao Q. Ngo, 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