Eliezer Zachary Nussbaum, MD

Medicare activity in 2024

Official CMS public-use data for Eliezer Zachary Nussbaum, 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)175 services
2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)24 services
3. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)18 services
4. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)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 cholesterol75%
• Chronic kidney disease73%
• Heart failure66%
• Ischemic heart disease58%
• Anxiety55%

Hospitals where Eliezer Zachary Nussbaum works

Medicare's Facility Affiliation Data lists Eliezer Zachary Nussbaum 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.

• Tufts Medical CenterBoston, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220116

Practice locations

Addresses where Eliezer Zachary Nussbaum is enrolled with Medicare (CMS data updated October 2, 2026).

• 800 Washington StBoston, MA 02111 (617) 636‑5000

Group practices

Medicare enrollment lists Eliezer Zachary Nussbaum as a member of this group (CMS data updated October 2, 2026).

• Pratt Medical Group Inc286 clinicians in the group

Specialties

• Infectious Diseaseprimary
• Internal Medicinealso

Find other Infectious Disease doctors in Massachusetts →

Other infectious disease doctors in Boston

Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.

• Lindsey R. Baden, MD
• Swalpa Udit
• Jay A. Fishman, MD
• Michelle Chan
• Robin R. Ingalls, MD
• Gilad Sherman, MD
• Rachel N. Mittelstaedt, MD
• Nicolas C. Issa, MD

All infectious disease doctors in Boston →

Other clinicians in Pratt Medical Group Inc

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

• Abigail L. Sroczenski
• Jacob Elkon, MD
• Carol R. Pilgrim, NP
• Mary Johnstone
• Michael K. Paasche Orlow, MD
• Maher K. Tabba, 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