(414) 266-2000

Our specialists

Our caregiver team offers best-practice care that only a major center like ours can provide. Herma Heart Institute doctors are consistently ranked among The Best Doctors in America and offer some of the best outcomes in the nation. What’s more, we’re the only pediatric heart care program in Wisconsin where all caregivers are full-time fetal, neonatal and pediatric experts.


Children’s Hospital of Wisconsin is committed to providing you the information you need to make informed decisions about your heart specialist. As part of that commitment, we post our patient satisfaction ratings within our provider profiles. To assist you on how we post ratings (and why there may not be ratings listed), we’ve developed this guide.

Cardiothoracic surgeons


Cardiac intensive care

Cardiac anesthesiologists


  • Dan Beacher, MD 
  • Erin Davis, MD
  • Margaret "Peggy" Keane, MD
  • Matthew Moehlmann, DO
  • Alex Raskin, MD
  • Shagun Sachdeva, MBBS
  • Nikki Singh, MD
  • Andrew Spearman, MD
  • Rachel Sullivan, MD
  • Chris Sumski, DO

Advanced practice nurses

Physician assistants

Cardiology nurse clinicians

  • Stacy Bobber (Manager)
  • Carol Carson
  • Dawn Dziubek
  • Maura Flynn-Galganski
  • Katie Kogutkiewicz
  • Terri Konkel
  • Kristina Mingus
  • Lisa Neidhold
  • Lauren Raczaka
  • Liz Reid
  • Emily Reinhardt
  • Joel Robers
  • Tara Saleska
  • Jane Sowinski
  • Kristin Sullivan
  • Katie Vogt
  • Deb Walbergh
  • Paula Welch

Surgery nurse clinicians

  • Yvonne Renick, RN (Lead)
  • Laura Haas, RN
  • Courtney Lazzara, RN
  • Katrina Patten, RN

Research faculty

Fetal Heart Program

  • Maura Flynn Galganski, RN
  • Paula Welch, RN

Cardiac social worker

  • Patricia Stoll

Neurodevelopmental Program

Herma Heart Institute psychologists

Cardiac dietitian

  • Melissa White


  • Kevin Daley
  • Caleb Varner
  • Kristine Kaiser
  • Kristen Kallis
  • Josheph Check
  • Michelle York

School intervention specialist

  • Kyle Landry

Project Adam

  • Allison Thompson 
  • Tracie Haugen
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Become a patient or contact us

Contact us for more information about the Herma Heart Institute. Request an appointment online or call (414) 607-5280 or toll-free (877) 607-5280.

Nationally recognized


Ranked #5 in the nation

U.S. News & World Report has once again ranked the Herma Heart Institute at Children's Hospital of Wisconsin among the top ten in the nation for pediatric cardiology and heart surgery. This ranking reflects the excellent outcomes and care we provide for even the most complex heart conditions. Families travel from across the country, and even around the world, to receive care from our specialists who are experienced in treating congenital heart disease from before birth and into adulthood.

Meet Viktor Hraska, MD, PhD


Viktor Hraska, MD, PhD
Surgical Director, Herma Heart Center
Children's Hospital of Wisconsin