Lia I. Losonczy, MD

Medicare activity in 2024

Official CMS public-use data for Lia I. Losonczy, 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. Critical care, first 30-74 minutes (99291)53 services
2. Emergency department visit with moderate level of medical decision making (99284)15 services
3. Emergency department visit with high level of medical decision making (99285)14 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%
• Diabetes50%
• Ischemic heart disease47%
• COPD43%

Hospitals where Lia I. Losonczy works

Medicare's Facility Affiliation Data lists Lia I. Losonczy 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.

• Alameda HospitalAlameda, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050211
• George Washington University HospitalWashington, DC · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 090001
• Highland HospitalOakland, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050320

Practice locations

Addresses where Lia I. Losonczy is enrolled with Medicare (CMS data updated October 2, 2026).

• 1411 E 31st StOakland, CA 94602 (510) 437‑4800
• 900 23rd St NWWashington, DC 20037 (202) 715‑4000

Group practices

Medicare enrollment lists Lia I. Losonczy as a member of these groups (CMS data updated October 2, 2026).

• Medical Faculty Associates, Inc672 clinicians in the group
• Alameda Health System601 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in California →

Other emergency medicine doctors in Oakland

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

• John W. Morehouse, MD
• Melissa C. Clark, MD
• Abbas H. Kothari, MD
• Charmiane S. Lieu, MD
• Allison Lam, MD
• Tara D. Benesch, MD
• Rene M. Venegas, MD
• Jacob E. Moore, MD

All emergency medicine doctors in Oakland →

Other clinicians in Medical Faculty Associates, Inc

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

• Antonio N. Puente, CP
• Patrick D. Conway, DO
• Natasha Tobarran, DO
• Shawn Sarin, MD
• Melissa Bucklin, PA
• Raymond Janowski, 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