Donald Zweig, MD

Medicare activity in 2024

Official CMS public-use data for Donald Zweig, 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)216 services
2. Emergency department visit with high level of medical decision making (99285)209 services
3. Critical care, first 30-74 minutes (99291)77 services
4. Emergency department visit with moderate level of medical decision making (99284)18 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%
• Arthritis51%
• Diabetes46%
• Chronic kidney disease42%
• Ischemic heart disease41%

Hospitals where Donald Zweig works

Medicare's Facility Affiliation Data lists Donald Zweig 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.

• Memorial Medical CenterModesto, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050557

Practice locations

Addresses where Donald Zweig is enrolled with Medicare (CMS data updated October 2, 2026).

• 200 C StPatterson, CA 95363 (209) 722‑4842
• 2240 W Monte Vista AveTurlock, CA 95382 (209) 722‑4842
• 2540 E StConcord, CA 94520 (929) 682‑8200

Group practices

Medicare enrollment lists Donald Zweig as a member of these groups (CMS data updated October 2, 2026).

• Cep America - California1,292 clinicians in the group
• Golden Valley Health Centers113 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in California →

Other emergency medicine doctors in California

Clinicians with the same Medicare primary specialty in California — not a recommendation.

• Jonathan Caldwell, MD
• Hannah M. Carr, MD
• Kenyatta K. Evans, MD
• Michael Y. Sunu, MD
• Virag J. Shah, MD
• Ashley R. Tarchione, MD
• John L. Lin, MD
• Mason A. Bragg, MD

All emergency medicine doctors in California →

Other clinicians in Cep America - California

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

• Kenyatta K. Evans, MD
• Bryan Brown, PA
• Lana Hariri, MD
• John L. Lin, MD
• Priya M. Vishwanath, NP
• Matthew P. Herrick, 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