Rajarshi Mazumder, MD

Medicare activity in 2024

Official CMS public-use data for Rajarshi Mazumder, 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. Measurement of brain wave activity with video (veeg), 12-26 hours with review and report by health care professional (95720)45 services
2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)23 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)21 services
4. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)13 services
5. Measurement of brain wave activity (eeg), awake and drowsy (95816)12 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%
• Arthritis53%
• Stroke or mini-stroke47%
• Diabetes44%
• Ischemic heart disease39%

Hospitals where Rajarshi Mazumder works

Medicare's Facility Affiliation Data lists Rajarshi Mazumder 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

Practice locations

Addresses where Rajarshi Mazumder is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.

• 100 Medical Plz, Suite 425Los Angeles, CA 90095 (310) 794‑1500
• 150 Medical PlzLos Angeles, CA 90095 (310) 825‑9989
• 200 UCLA Medical Plz, Suite 120Los Angeles, CA 90095 (310) 206‑6931
• 300 Medical Plaza, B200Los Angeles, CA 90095 (310) 794‑1195
• 300 Medical PlzLos Angeles, CA 90095

Group practices

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

• The Regents of the University of California97 clinicians in the group

Specialties

• Neurologyprimary

Find other Neurology doctors in California →

Other neurologists in Los Angeles

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

• Timothy S. Chang, MD
• Nancy Lamb, MD
• Ulrich Batzdorf, MD
• Jodi L. Nelson, DO
• Viviana Jimenez, MD
• Timothy F. Cloughesy, MD
• Tirth K. Patel, MD
• Arousiak V. Maraian, MD

All neurologists in Los Angeles →

Other clinicians in The Regents of the University of California

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

• Timothy S. Chang, MD
• Angel L. Moreno, NP
• William P. Flavin, MD
• Andrew C. Charles, MD
• David Shaner, MD
• Keith A. Vossel, 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