Ewelina Bryll-Perzan, MD

Medicare activity in 2024

Official CMS public-use data for Ewelina Bryll-Perzan, 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. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)605 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)452 services
3. Insertion of needle into vein for collection of blood sample (36415)391 services
4. Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report (95251)85 services
5. Blood glucose (sugar) test performed by hand-held instrument (82962)73 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%
• High blood pressure69%
• Osteoporosis45%
• Diabetes41%
• Arthritis37%
• Ischemic heart disease27%

Hospitals where Ewelina Bryll-Perzan works

Medicare's Facility Affiliation Data lists Ewelina Bryll-Perzan 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.

• Northern Westchester HospitalMount Kisco, NY · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 330162
• Phelps HospitalSleepy Hollow, NY · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 330261

Practice locations

Addresses where Ewelina Bryll-Perzan is enrolled with Medicare (CMS data updated October 2, 2026).

• 60 Goldens Bridge RdKatonah, NY 10536 (914) 241‑9026

Group practices

Medicare enrollment lists Ewelina Bryll-Perzan as a member of this group (CMS data updated October 2, 2026).

• Westchester Health Medical PC88 clinicians in the group

Specialties

• Endocrinologyprimary

Find other Endocrinology doctors in New York →

Other endocrinologists in Katonah

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

• Aditi Chincholi, MD
• Rita E. Landman, MD
• Antonio Pantaleo, MD

All endocrinologists in Katonah →

Other clinicians in Westchester Health Medical PC

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

• Aditi Chincholi, MD
• Dana M. Thomas, MNT
• Richard P. Santarosa, MD
• Sean W. Donegan, MD
• Tiffany Werbin-Silver, MD
• Nina S. Inamdar, 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