Stephen J. Allegra, MD

Medicare activity in 2024

Official CMS public-use data for Stephen J. Allegra, 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. Emergency department visit with high level of medical decision making (99285)112 services
2. Emergency department visit with moderate level of medical decision making (99284)62 services
3. Critical care, first 30-74 minutes (99291)18 services
4. Emergency department visit with low level of medical decision making (99283)14 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 cholesterol64%
• Anxiety52%
• Depression43%
• Arthritis36%
• Ischemic heart disease36%

Hospitals where Stephen J. Allegra works

Medicare's Facility Affiliation Data lists Stephen J. Allegra 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.

• Cambridge Health AllianceCambridge, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220011

Practice locations

Addresses where Stephen J. Allegra is enrolled with Medicare (CMS data updated October 2, 2026).

• 103 Garland StEverett, MA 02149 (617) 389‑6270
• 1493 Cambridge StCambridge, MA 02139 (617) 665‑1000

Group practices

Medicare enrollment lists Stephen J. Allegra as a member of this group (CMS data updated October 2, 2026).

• Cambridge Public Health Commission656 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in Massachusetts →

Other emergency medicine doctors in Everett

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

• Benjamin Bloom, MD
• Drew A. Birrenkott, MD
• Pia Chatterjee, MD
• Agnes Y. Choi, MD
• Caroline Gorka, MD
• Julie Gray, MD
• Bethanne Bartscherer, MD
• Zachary Oliff, DO

All emergency medicine doctors in Everett →

Other clinicians in Cambridge Public Health Commission

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

• Lauren W. Bierman, MD
• Lindsey R. Kelly
• Jeremy Stricsek, MD
• Andrew Katz, MD
• Rose H. Goldman, MD
• Debra M. Mulley, 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