Martin Zak, MD

Medicare activity in 2024

Official CMS public-use data for Martin Zak, 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)225 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)25 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)20 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%
• Chronic kidney disease67%
• Diabetes61%
• Heart failure61%
• Ischemic heart disease59%

Hospitals where Martin Zak works

Medicare's Facility Affiliation Data lists Martin Zak 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.

• Jackson Health SystemMiami, FL · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 100022

Practice locations

Addresses where Martin Zak is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 46; the Medicare profile lists all.

• 1400 NW 12th AveMiami, FL 33136
• 1400 NW 12th Ave 1st FlMiami, FL 33136
• 1400 NW 12th Ave 1st Flr, Umhc Uhealth TowerMiami, FL 33136
• 1400 NW 12th Ave 1st Flr Gi Ctr, Umhc Uhealth TowerMiami, FL 33136 (305) 243‑4598
• 1400 NW 12th Ave 5th Flr Sicu, Umhc Uhealth TowerMiami, FL 33136 (305) 355‑5241

Group practices

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

• University of Miami2,377 clinicians in the group

Specialties

• Critical Care (Intensivists)primary
• Internal Medicinealso

Find other Critical Care (Intensivists) doctors in Florida →

Other critical care doctors in Miami

Clinicians with the same Medicare primary specialty in Miami, FL — not a recommendation.

• Tony M. Ibrahim, MD
• Travis W. Murphy, MD
• Prithvi Raj Sendi, MD
• Hayley B. Gershengorn, MD
• Louis Pizano, MD
• Tram N. Nguyen, MD
• Justin C. Speigel, MD
• Rushil Randive, DO

All critical care doctors in Miami →

Other clinicians in University of Miami

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

• Yoh Sawatari, DDS
• Adriana D. Valbuena Valecillos, MD
• Odile M. Carro
• Charles F. Zhang, MD
• Karla Morillo Manon, NP
• Ramon E. Flores Gonzalez, 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