Jennifer S. Xu, MD

Medicare activity in 2024

Official CMS public-use data for Jennifer S. Xu, 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. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)654 services
2. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)407 services
3. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)371 services
4. Ultrasound of heart with color-depicted blood flow, rate and valve function (93325)116 services
5. 3d radiographic procedure (76376)95 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%
• Ischemic heart disease48%
• Diabetes43%
• Chronic kidney disease41%

Hospitals where Jennifer S. Xu works

Medicare's Facility Affiliation Data lists Jennifer S. Xu 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 Jennifer S. Xu 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 Jennifer S. Xu as a member of this group (CMS data updated October 2, 2026).

• UC Regents319 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary
• Internal Medicinealso

Find other Cardiovascular Disease (Cardiology) doctors in California →

Other cardiologists in Orange

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

• Behram P. Mody, MD
• David C. Pan, MD
• Robert L. Pedicini, MD
• Dicron B. Baron, MD
• Pierangelo Renella, MD
• Pranav M. Patel, MD
• Michael C. Dam, MD
• Sina Kianoush, MD

All cardiologists in Orange →

Other clinicians in UC Regents

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

• Robby Ayoub, MD
• Nellie N. Nafissi, MD
• John E. Sy, MD
• Yulian Khagi, MD
• Miguel Villalona Calero, MD
• Ankmalika A. Gupta, 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