Agata Jaskiewicz Poznanska, MD

Medicare activity in 2024

Official CMS public-use data for Agata Jaskiewicz Poznanska, 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)804 services
2. 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)413 services
3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)254 services
4. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)219 services
5. Administration of influenza virus vaccine (G0008)84 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%
• Arthritis51%
• Anxiety32%
• Ischemic heart disease30%
• Osteoporosis28%

Hospitals where Agata Jaskiewicz Poznanska works

Medicare's Facility Affiliation Data lists Agata Jaskiewicz Poznanska 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.

• Danbury HospitalDanbury, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070033

Practice locations

Addresses where Agata Jaskiewicz Poznanska is enrolled with Medicare (CMS data updated October 2, 2026).

• 22 Old Waterbury RdSouthbury, CT 06488 (203) 262‑4200

Group practices

Medicare enrollment lists Agata Jaskiewicz Poznanska as a member of this group (CMS data updated October 2, 2026).

• Nuvance Health Medical Practice Ct Inc747 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Connecticut →

Other family doctors in Connecticut

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

• Robert J. Carr, MD
• Ghulam Khan, MD
• Pooja Kulkarni, MD
• Terrence A. Doherty, MD
• Anthony G. Lendino, MD
• Srinivasulu Conjeevaram, MD
• Zhilin Jin
• Samuel Werner, DO

All family doctors in Connecticut →

Other clinicians in Nuvance Health Medical Practice Ct Inc

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

• Jeanwan Kang, MD
• Kristen Jackson, MD
• Carina N. Leggio
• Latha Subramaniam, MD
• Kathleen Bernard, MD
• Sasraku Amanor-Boadu, 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