Christine Hsieh, MD

Medicare activity in 2024

Official CMS public-use data for Christine Hsieh, 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. Diagnostic exam of anus using an endoscope (46600)40 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)39 services
3. Biopsy of large bowel using a flexible endoscope (45380)28 services
4. New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more (99202)23 services
5. Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)16 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%
• Arthritis54%
• Diabetes44%
• Chronic kidney disease43%
• Ischemic heart disease24%

Hospitals where Christine Hsieh works

Medicare's Facility Affiliation Data lists Christine Hsieh 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.

• Keck Hospital of USCLos Angeles, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 050696
• USC Arcadia HospitalArcadia, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050238

Practice locations

Addresses where Christine Hsieh is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 10; the Medicare profile lists all.

• 1441 Eastlake Ave, Suite 2424Los Angeles, CA 90089 (323) 442‑2582
• 1450 San Pablo StLos Angeles, CA 90033
• 1500 San Pablo StLos Angeles, CA 90033
• 1516 San Pablo StLos Angeles, CA 90033 (800) 872‑2273
• 1516 San Pablo St, Suite L3100Los Angeles, CA 90033 (800) 872‑2273

Group practices

Medicare enrollment lists Christine Hsieh as a member of this group (CMS data updated October 2, 2026).

• USC Care Medical Group Inc1,380 clinicians in the group

Specialties

• Colorectal Surgery (Proctology)primary

Find other Colorectal Surgery (Proctology) doctors in California →

Other colorectal surgeons in Los Angeles

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

• Sacha Broccard, MD
• Yosef Y. Nasseri, MD
• Motahar Basam, MD
• Vikram Attaluri, MD
• Marjun P. Duldulao Iii, MD
• Sang W. Lee, MD
• Elisabeth C. McLemore, MD
• Moshe Barnajian, MD

All colorectal surgeons in Los Angeles →

Other clinicians in USC Care Medical Group Inc

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

• Emma C. Koesters, MD
• Betty M. Erfe, MD
• Hakan Sahin, MD
• Loren Geller, MD
• Saroja D. Bangaru, MD
• Amy M. Jaehning, NP

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