Marielle S. Ferstenberg, DO

Medicare activity in 2024

Official CMS public-use data for Marielle S. Ferstenberg, 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. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)42 services
2. X-ray of surgical specimen (76098)27 services
3. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)17 services
4. Partial removal of breast (19301)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 cholesterol75%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
• High blood pressure74%
• Arthritis49%
• Depression36%
• Diabetes34%

Hospitals where Marielle S. Ferstenberg works

Medicare's Facility Affiliation Data lists Marielle S. Ferstenberg 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.

• Kaleida HealthBuffalo, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330005
• Sisters of Charity HospitalBuffalo, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330078

Practice locations

Addresses where Marielle S. Ferstenberg is enrolled with Medicare (CMS data updated October 2, 2026).

• 55 Spindrift Dr, Suite 220Williamsville, NY 14221 (716) 626‑6300

Group practices

Medicare enrollment lists Marielle S. Ferstenberg as a member of this group (CMS data updated October 2, 2026).

• Windsong Health Medical Alliance PLLC4 clinicians in the group

Specialties

• Surgical Oncologyprimary

Find other Surgical Oncology doctors in New York →

Other surgical oncologists in New York

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

• Rohit Chandwani
• Daniel Thomas, MD
• Neha Goel, MD
• Pond Kelemen, MD
• Maitham A. Moslim, MD
• Christopher Zambrano, DO
• Tomasine Fodera, MD
• Kristin N. Kelly, MD

All surgical oncologists in New York →

Other clinicians in Windsong Health Medical Alliance PLLC

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

• Sabrina M. Gerster
• Chelsey C. Ciambella, MD
• Sara Fritsch, PA

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