Louie Coulis, MD, FACC

Dr. Coulis has been practicing cardiology in Sheboygan for more than 20 years. He earned his medical degree at Indiana University and completed his cardiovascular training at the Cleveland Clinic. He maintains board certification in both general cardiology and nuclear cardiology by the American Society of Cardiology and Nuclear Cardiology.

Dr. Coulis has participated as primary investigator in numerous national and international clinical trials. He maintains his special interests in preventative cardiology and cardiac imaging.

He is a fellow of the American College of Cardiology.


Joseph Miller, PA-C

Joseph earned his master’s in physician assistant studies from Rosalind Franklin University of Medicine and Science, North Chicago, Ill. He also received a bachelor's degree in biology at Carthage College, Kenosha, Wis. Joseph is certified by the National Commission on Certification of Physician Assistants.

His duties include, but are not limited to managing the anticoagulation clinic and overseeing cardiac diagnostic testing. Joseph looks forward to seeing office patients in the near future with a focus on heart failure.

Joseph and his wife currently live in Sheboygan. He was raised in rural northern Wisconsin where he developed a love for the outdoors, including fishing and hunting. Joseph also enjoys playing golf and bicycling on the many trails the Sheboygan area offers. He is very involved with his church and plays club sports like softball and football.


Katherine Loveless, ACNP, CCDS, CEPS, DNP

We welcomed Katherine Loveless to the Coulis Cardiology team of leading specialist in Fall of 2021. Katherine is an Acute Care Nurse practitioner who earned her degree from Marquette University in 2008. In 2020 she received a Doctorate in Nursing Practice in System Leadership and Healthcare Quality from Marquette. She holds 2 certifications from the International Board of Heart Rhythm Examiners as a Cardiac Device Specialist and Electrophysiology Specialist.

Katherine enjoys volunteering for the Heart Rhythm Society as well as serving as a rotational site instructor in the Marquette nurse practitioner program. She is a very patient-centered care professional; engaging to the needs of her patients and proactive in shared clinical decisions guided by the latest evidence while collaborating with other members of the healthcare team.
Welcome Katherine!


Mackenzie Smith, RN, BSN

Nurse Practitioner Mackenzie Smith joined us September 2021. She comes with many years of experience in the Sports Medicine, Urgent Care, ICU and Family Practice. Makenzie received her Master of Science through Bellin College of Nursing. She holds certification in Advanced Cardiovascular Life Support and Pediatric Life Support, Health Stroke Certified through National Institute, as well as Ethics and Human Subject Protection and various CPR and AED through the American Heart Association.

Mackenzie is a Wisconsin native. She holds memberships in many local organizations including American Association of Nurse Practitioners, Cardiac Telemetry Standardization Team, and many others.
Welcome Mackenzie!