Rachelle M. St Onge

Medicare activity in 2024

Official CMS public-use data for Rachelle M. St Onge, 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.

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 cholesterol60%
• Arthritis55%

Hospitals where Rachelle M. St Onge works

Medicare's Facility Affiliation Data lists Rachelle M. St Onge 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

Practice locations

Addresses where Rachelle M. St Onge is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.

• 100 High StBuffalo, NY 14203 (716) 859‑5600
• 111 N Maplemere Rd, Suite 150Williamsville, NY 14221 (716) 636‑8284
• 445 Tremont StNorth Tonawanda, NY 14120 (716) 694‑4500
• 445 Tremont St, Box 0705N Tonawanda, NY 14120 (716) 694‑4500
• 818 Ellicott StBuffalo, NY 14203 (716) 323‑2000

Group practices

Medicare enrollment lists Rachelle M. St Onge as a member of these groups (CMS data updated October 2, 2026).

• Kaleida Health236 clinicians in the group
• University Gynecologists and Obstetricians, Inc.11 clinicians in the group

Specialties

• Obstetrics/Gynecologyprimary

Find other Obstetrics/Gynecology doctors in New York →

Other OB-GYNs in Buffalo

Clinicians with the same Medicare primary specialty in Buffalo, NY — not a recommendation.

• Judine C. Davis, MD
• Rebeccah L. Stevens, MD
• Stephanie Santoro
• Eddie E. Mas, MD
• Faye E. Justicia Linde, MD
• Dalip K. Khurana, MD
• Dawei David D. Wang, MD
• Yamini Mulla, MD

All OB-GYNs in Buffalo →

Other clinicians in Kaleida Health

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

• Andrew Reynolds, MD
• Arie L. Weinstock, MD
• Lauren M. Devito, PA
• Jasmyn Miller, MD
• Antoine Makdissi, MD
• Melissa Cancel, NP

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