Zayn C. Endo, MD

Medicare activity in 2024

Official CMS public-use data for Zayn C. Endo, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)17 services
2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)16 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 cholesterol69%
• Diabetes62%
• Heart failure54%
• Arthritis50%
• Ischemic heart disease46%

Hospitals where Zayn C. Endo works

Medicare's Facility Affiliation Data lists Zayn C. Endo 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.

• Loma Linda University Medical CenterLoma Linda, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050327

Practice locations

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

• 11234 Anderson StLoma Linda, CA 92354
• 11370 Anderson StLoma Linda, CA 92354
• 250 S G StSan Bernardino, CA 92410 (909) 382‑7100
• 26780 Barton RdRedlands, CA 92373 (909) 558‑5174
• 488 S K StSan Bernardino, CA 92410 (909) 383‑8092

Group practices

Medicare enrollment lists Zayn C. Endo as a member of these groups (CMS data updated October 2, 2026).

• Faculty Physicians and Surgeons of Llusm1,315 clinicians in the group
• Sac Health System227 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Loma Linda

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

• Jerry T. Martell, MD
• Amandeep Sidhu, DO
• Mathew P. Shedd, MD
• Belliny M. Phaeton, MD
• Robert Niihara, MD
• Carvy Floyd O. Luceno, MD
• Shahriyar Tavakoli, MD
• Jin Hyun Moon, MD

All internal medicine doctors in Loma Linda →

Other clinicians in Faculty Physicians and Surgeons of Llusm

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

• James S. Maurer, MD
• Stephanie J. Frank, MD
• Sagar J. Pathak, MD
• Alexander Santillan Quiroz, MD
• Thanh X. Hoang, MD
• Hrant Gevorgian, 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