Zhen W. Mei, MD

Medicare activity in 2024

Official CMS public-use data for Zhen W. Mei, 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. Blood bank physician services for cross match and/or evaluation and written report (86077)42 services
2. Blood bank physician services with written report (86079)39 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 cholesterol66%
• Arthritis61%
• Chronic kidney disease57%
• Heart failure48%
• Ischemic heart disease43%

Hospitals where Zhen W. Mei works

Medicare's Facility Affiliation Data lists Zhen W. Mei 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.

• Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050262
• Santa Monica - UCLA Medical Center & Orthopaedic HospitalSanta Monica, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050112
• UCLA West Valley Medical CenterWest Hills, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050481

Practice locations

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

• 5900 W Olympia BlvdLos Angeles, CA 90036 (310) 267‑2680
• 7300 Medical CtrWest Hills, CA 91307 (818) 676‑4000

Group practices

Medicare enrollment lists Zhen W. Mei as a member of this group (CMS data updated October 2, 2026).

• UCLA Pathology and Laboratory Medicine Group68 clinicians in the group

Specialties

• Pathologyprimary

Find other Pathology doctors in California →

Other pathologists in Los Angeles

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

• David Park, MD
• Sergei K. Tatishchev, MD
• Mai Elzieny, MD
• Alberto M. Marchevsky, MD
• Melanie A. Osby, MD
• Jianyu Rao, MD
• Xiaotang Du, MD
• Bita Naini, MD

All pathologists in Los Angeles →

Other clinicians in UCLA Pathology and Laboratory Medicine Group

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

• Mai Elzieny, MD
• Dinesh S. Rao, MD
• Peggy S. Sullivan, MD
• Matthew S. Koo, MD
• Daniel P. Stefanko, MD
• Neda Moatamed, 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