Jennifer W. Zhan, MD

Medicare activity in 2024

Official CMS public-use data for Jennifer W. Zhan, 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)43 services
2. Critical care, first 30-74 minutes (99291)41 services
3. Emergency department visit with high level of medical decision making (99285)39 services
4. Emergency department visit with moderate level of medical decision making (99284)20 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 cholesterol70%
• Diabetes61%
• Arthritis56%
• Chronic kidney disease48%
• COPD37%

Hospitals where Jennifer W. Zhan works

Medicare's Facility Affiliation Data lists Jennifer W. Zhan 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.

• California Hospital Medical Center LALos Angeles, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050149
• Mountains Community HospitalLake Arrowhead, CA · Critical Access Hospital · Emergency services: listed by Medicare · CCN 051312

Practice locations

Addresses where Jennifer W. Zhan is enrolled with Medicare (CMS data updated October 2, 2026).

• 1401 S Grand AveLos Angeles, CA 90015 (213) 742‑5555
• 29101 Hospital RdLake Arrowhead, CA 92352 (925) 482‑8249
• 6041 Cadillac AveLos Angeles, CA 90034 (800) 954‑8000

Group practices

Medicare enrollment lists Jennifer W. Zhan as a member of these groups (CMS data updated October 2, 2026).

• Southern California Permanente Medical Group11,293 clinicians in the group
• Golden State Emergency Physicians Inc27 clinicians in the group
• Elite Hospitalist Medical Group Inc15 clinicians in the group
• Western Sierra Emergency Physicians Medical Group Inc6 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in California →

Other emergency medicine doctors in Los Angeles

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

• David Z. Bowman, MD
• George M. Karroum, MD
• Charles L. Cheng, MD
• Jake Toy, DO
• Heidee D. Villanueva, DO
• Tom Kuo, MD
• Victor W. Galson, MD
• Saima Zubair, MD

All emergency medicine doctors in Los Angeles →

Other clinicians in Southern California Permanente Medical Group

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

• Kelly A. Nishikawa, MD
• Barbara-Jean G. Santos
• Ami D. Bali, PA
• Andrew C. Ghatan, MD
• Michelle D. Money, MD
• Mikhail W. Fraser-Gray, PA

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