Malak P. Zacca Shammas, MD

Medicare activity in 2024

Official CMS public-use data for Malak P. Zacca Shammas, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)267 services
2. Insertion of needle into vein for collection of blood sample (36415)254 services
3. Blood test, comprehensive group of blood chemicals (80053)215 services
4. Blood test, lipids (cholesterol and triglycerides) (80061)205 services
5. Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)194 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 cholesterol75%
• High blood pressure55%
• Arthritis38%
• Osteoporosis30%
• Ischemic heart disease21%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)15%

Hospitals where Malak P. Zacca Shammas works

Medicare's Facility Affiliation Data lists Malak P. Zacca Shammas 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.

• Cedars-Sinai Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050625
• Saint John's Health CenterSanta Monica, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050290

Practice locations

Addresses where Malak P. Zacca Shammas is enrolled with Medicare (CMS data updated October 2, 2026).

• 8920 Wilshire Blvd, Suite 310Beverly Hills, CA 90211 (310) 271‑6229

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in California →

Other internal medicine doctors in Beverly Hills

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

• Andrew Y. Chuang, MD
• Mark R. Honzel, MD
• Nitin Kapur, MD
• Clement Yang, MD
• David Austin, MD
• Terry M. Schaack, MD
• Omowunmi A. Aibana, MD
• Christopher R. Fitzgerald, MD

All internal medicine doctors in Beverly Hills →

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