Stephen J. Firshein, MD

Medicare activity in 2024

Official CMS public-use data for Stephen J. Firshein, 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. Injection, ferric carboxymaltose, 1 mg (J1439)38,250 services
2. Injection, epoetin alfa, (for non-esrd use), 1000 units (J0885)11,840 services
3. Injection, immune globulin, (gammagard liquid), non-lyophilized, (e.g., liquid), 500 mg (J1569)11,060 services
4. Injection, romosozumab-aqqg, 1 mg (J3111)7,980 services
5. Injection, epoetin alfa-epbx, biosimilar, (retacrit) (for non-esrd use), 1000 units (Q5106)7,135 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%
• Arthritis50%
• Chronic kidney disease40%
• Ischemic heart disease39%
• Diabetes32%

Hospitals where Stephen J. Firshein works

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

• Hartford HospitalHartford, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070025

Practice locations

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

• 100 Simsbury RdAvon, CT 06001 (860) 258‑3480
• 1260 Silas Deane HwyWethersfield, CT 06109 (860) 832‑4666

Group practices

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

• Starling Physicians, PLLC283 clinicians in the group

Specialties

• Hematology/Oncologyprimary

Find other Hematology/Oncology doctors in Connecticut →

Other hematologist-oncologists in Connecticut

Clinicians with the same Medicare primary specialty in Connecticut — not a recommendation.

• Rajvi V. Patel, MD
• Jamie A. Stratton, MD
• Michael S. Isakoff, MD
• Wenli Gao, MD
• Su Hsien Lim, MD
• Justine Ryu, MD
• Paul E. Berard, MD
• Vipra Sharma, MD

All hematologist-oncologists in Connecticut →

Other clinicians in Starling Physicians, PLLC

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

• Priya Roy, MD
• Eric Shore, MD
• Diamond Tyrell-Smith, DO
• Mitesh Trivedi, MD
• Lisa Rinaldi, MD
• Vishal Kochar

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