Ahmad N. Kassem, MD

Medicare activity in 2024

Official CMS public-use data for Ahmad N. Kassem, 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 35 minutes (99232)26 services
2. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)25 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)15 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%
• Heart failure60%
• Chronic kidney disease56%
• Diabetes54%
• Anxiety53%

Hospitals where Ahmad N. Kassem works

Medicare's Facility Affiliation Data lists Ahmad N. Kassem 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.

• Brigham and Women's HospitalBoston, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220110
• Holy Family HospitalMethuen, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220080
• Merrimack Health Lawrence HospitalLawrence, MA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 220010

Practice locations

Addresses where Ahmad N. Kassem is enrolled with Medicare (CMS data updated October 2, 2026).

• 5 Branch St, Fl 3Methuen, MA 01844 (617) 632‑3586

Group practices

Medicare enrollment lists Ahmad N. Kassem as a member of this group (CMS data updated October 2, 2026).

• Dana-Farber Cancer Institute, Inc.684 clinicians in the group

Specialties

• Medical Oncologyprimary
• Hematologyalso

Find other Medical Oncology doctors in Massachusetts →

Other oncologists in Massachusetts

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

• Taylor Ortiz, MD
• Gunsagar Gulati
• Reid W. Merryman, MD
• Ann W. Silk, MD
• Edwin Choy, MD
• Andrew J. Aguirre, MD
• Vinayak Venkataraman, MD
• Mahasweta Gooptu, MD

All oncologists in Massachusetts →

Other clinicians in Dana-Farber Cancer Institute, Inc.

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

• Reid W. Merryman, MD
• Erin K. Askman, PA
• Ann W. Silk, MD
• Shayna R. Sarosiek, MD
• J Paul Marcoux Ii, MD
• David A. Qualls, 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