Olga Kantor, MD

Medicare activity in 2024

Official CMS public-use data for Olga Kantor, 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. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)62 services
2. Partial removal of breast (19301)55 services
3. X-ray of surgical specimen (76098)47 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)20 services
5. Biopsy or removal of deep lymph nodes of underarm (38525)17 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).

• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)75%
• High cholesterol74%
• High blood pressure62%
• Arthritis55%
• Anxiety35%
• Depression24%

Hospitals where Olga Kantor works

Medicare's Facility Affiliation Data lists Olga Kantor 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 Faulkner HospitalJamaica Plain, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220119
• Brigham and Women's HospitalBoston, MA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 220110
• Northwestern Memorial HospitalChicago, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140281

Practice locations

Addresses where Olga Kantor is enrolled with Medicare (CMS data updated October 2, 2026).

• 250 E Superior St, Suite 4 420Chicago, IL 60611 (312) 695‑0990

Group practices

Medicare enrollment lists Olga Kantor as a member of this group (CMS data updated October 2, 2026).

• Northwestern Medical Faculty Foundation4,503 clinicians in the group

Specialties

• Surgical Oncologyprimary

Find other Surgical Oncology doctors in Illinois →

Other surgical oncologists in Chicago

Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.

• Xavier M. Keutgen, MD
• Mitchell C. Posner, MD
• Shishir K. Maithel, MD
• Elizabeth A. Marcus, MD
• Seema A. Khan, MD
• Kevin P. Bethke, MD
• Jeffrey B. Matthews, MD
• Menghan Zhao, MD

All surgical oncologists in Chicago →

Other clinicians in Northwestern Medical Faculty Foundation

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

• Rikin Patel, MD
• Kristin L. Miller, MD
• Melissa D. Bregger, MD
• Frederick L. Hoff, MD
• Khursheed Ahmed, MD
• Laura Zuckerman

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