Jonatan D. Nunez Breton, MD

Medicare activity in 2024

Official CMS public-use data for Jonatan D. Nunez Breton, 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)383 services
2. Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)243 services
3. Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician (93018)102 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)99 services
5. Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)97 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%
• Arthritis45%
• Ischemic heart disease44%
• Chronic kidney disease34%
• Atrial fibrillation32%

Hospitals where Jonatan D. Nunez Breton works

Medicare's Facility Affiliation Data lists Jonatan D. Nunez Breton 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.

• Mercy Medical Center - Cedar RapidsCedar Rapids, IA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 160079

Practice locations

Addresses where Jonatan D. Nunez Breton is enrolled with Medicare (CMS data updated October 2, 2026).

• 701 10th St SECedar Rapids, IA 52403
• 701 10th St SE J Edward Lundy, Mercy Pediatric ClinicCedar Rapids, IA 52403 (319) 832‑2328

Group practices

Medicare enrollment lists Jonatan D. Nunez Breton as a member of this group (CMS data updated October 2, 2026).

• Mercy Medical Center305 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary
• Internal Medicinealso

Find other Cardiovascular Disease (Cardiology) doctors in Iowa →

Other cardiologists in Cedar Rapids

Clinicians with the same Medicare primary specialty in Cedar Rapids, IA — not a recommendation.

• Susan M. Schima, MD
• Cam F. Campbell, MD
• Boothapuri Venkatesh, MD
• Keith J. Kopec, MD
• Sihan Ji, MD
• Shiny Mathewkutty, MD
• Mohammad A. Alshami, MD
• Todd T. Langager, MD

All cardiologists in Cedar Rapids →

Other clinicians in Mercy Medical Center

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

• Susan M. Schima, MD
• Melissa Toeller-Desimone, MD
• Elizabeth Wawrek, PSY
• Michael D. Baker, DO
• Maureen A. McDonagh
• Brian Jacquot, 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