Elizabeth A. Brem, MD

Medicare activity in 2024

Official CMS public-use data for Elizabeth A. Brem, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)193 services
2. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)163 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)156 services
4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)116 services
5. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)49 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 pressure74%
• High cholesterol70%
• Arthritis47%
• Diabetes36%
• Chronic kidney disease34%
• Ischemic heart disease31%

Hospitals where Elizabeth A. Brem works

Medicare's Facility Affiliation Data lists Elizabeth A. Brem 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.

• Hoag Memorial Hospital PresbyterianNewport Beach, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050224
• UCI Health-OrangeOrange, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050348

Practice locations

Addresses where Elizabeth A. Brem is enrolled with Medicare (CMS data updated October 2, 2026).

• 101 the City Dr SOrange, CA 92868 (714) 456‑7004

Group practices

Medicare enrollment lists Elizabeth A. Brem as a member of this group (CMS data updated October 2, 2026).

• UC Regents319 clinicians in the group

Specialties

• Internal Medicineprimary
• Hematology/Oncologyalso

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Orange

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

• Victoria M. Villaflor, MD
• Brett Mullin, MD
• Graciela L. Imbastari, MD
• Tuan Nguyen, DO
• Bardia Sadr, MD
• Peter H. Nguyen, MD
• Ronald N. Daoud, MD
• Katarzyna Twardowska, MD

All internal medicine doctors in Orange →

Other clinicians in UC Regents

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

• Victoria M. Villaflor, MD
• Caroline Bui, DO
• Christina L. Ling, MD
• Ramy M. Hanna, MD
• Nhat Vo, MD
• Shravani R. Reddy, 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