Our Physicians & Staff

Dr. Joseph Apostol, MDDr. Joseph C Apostol, MD

Joseph C Apostol, MD, FACC, FSCAI is a board certified Interventional Cardiologist and founding partner of CardioVascular Consultants of Montana in Billings.  Dr. Apostol graduated with distinction from the University of Missouri-Kansas City 6-year combined BA/MD program.  He completed his internal medicine residency at the Mayo Clinic in Rochester, Minnesota and was the first chief medical resident at that institution.  Dr. Apostol attended Georgetown University in Washington, DC for clinical cardiology, Scripps Clinic in La Jolla, California for cardiovascular research, and The Care Group / Indiana Heart Institute in Indianapolis, Indiana for interventional cardiology and peripheral vascular interventional fellowship.  He was the chief interventional cardiology fellow during his time in Indianapolis.  His academic appointments include Instructor of Medicine at the Mayo Clinic and George E Hewitt Foundation for Medical Research Scholar and Guest Scientist at The Scripps Research Institute. He is board certified in both Cardiovascular Diseases and Interventional Cardiology.  He is a fellow of the American College of Cardiology (ACC) and the Society for Cardiovascular Angiography and Interventions (SCAI).  His specialty areas of interest include acute myocardial infarction intervention,  women’s heart health, non-angiographic invasive methods of coronary artery disease evaluation, and medical education of physicians and allied health professionals.  In his spare time, Dr. Apostol enjoys camping, watersports, snowboarding, and travel with family and friends.


Dr. Christina Ho, MDDr Christina YF Ho, MD

Christina YF Ho, MD is a board certified Family Physician and Managing Partner of CardioVascular Consultants of Montana.  She received her Doctor of Medicine degree at the University of Missouri-Kansas City in 1993 and completed her residency in 1996 at St. Joseph’s Hospital and Medical Center in Phoenix , AZ. While her initial medical practice was focused on traditional primary care medicine, she has developed a passion for heart care through the many patients she has cared for over the years.  Her interests were further supported in her role as a Supervising Stress Physician with The Care Group at the Indiana Heart Institute in Indianapolis, IN.  There she gained tremendous experience supervising an average of 30-40 patients daily who were undergoing stress tests.  After a career hiatus to devote time to raising her two young sons, she returned to healthcare in 2009 as the managing partner and business administrator of CardioVascular Consultants.   She embraces the challenge of running an efficient technologically advanced office while providing the highest level of quality compassionate medical care.


Mary Tucker, PA-CMary Tucker – Certified Physician Assistant

Mary Tucker, PA-C grew up in Ontonagon, MI. She obtained her undergraduate degree in Physiology from Michigan State University in 1986.  In 1989 she received a Masters degree in Cardiac Rehabilitation from the University of Wisconsin-LaCrosse.  She is a certified Exercise Specialist with the American College of Sports Medicine and worked as the coordinator of Hammons Heart Institute in Springfield, MO.   Mary furthered her professional career at Southwest Missouri State University in 2005 and became a certified Physician Assistant with special interests in Cardiology.  Dr. Apostol and Mary have had the unique privilege of working together since that time.  In addition to being a huge sports enthusiast,  she enjoys running, hiking, biking and playing with her two black labs.


Heidi – Director of Financial Relations

Heidi is an eastern Montana native hailing from Baker, MT. Married with one son, her passions include horses, rodeo, and spending time outdoors with her family. She began her professional career at St Vincent’s Hospital in 1999 and proceeded to obtain her coding certification in 2001. With her years of experience in billing, coding, and management of patient accounts, she serves this office well as the Director Financial Relations.




Andrea – Registered Nurse

Andrea is a North Dakota native.   She graduated from Dickinson Trinity High School  in Dickinson, ND and attended North Dakota State University where she received a BSN degree in Nursing.  Her past work experience has been in Cardiac Intensive Care and Outpatient Surgery. Andrea is very pleased to be back in cardiology. Married with three children,  she enjoys all outdoor activities with her family.




Alyssa – Registered Nurse

Alyssa grew up in southwestern Minnesota. She received her Bachelors of Arts in Nursing from Concordia College in Moorhead, MN in 2001. After graduation, she worked as an RN in the Cardiac Intensive Care Unit in Fargo, ND. In 2004 Alyssa and her husband, Trevor, moved to Billings where she worked in the Intensive Care Unit at St. Vincent Hospital for 7 years. She joined the CardioVascular Consultants of Montana staff in May 2011.   She and her husband have 2 children and 2 dogs.   Her hobbies include reading, knitting, and scrapbooking.



Misty – Registered Nurse

Misty is originally from Casper, Wyoming , She went to nursing school at Casper College and graduated in 2003.  A  proud mother of twin 6 year old girls, she has worked in a Cardiology office for most of her nursing career.  Misty joined Cardiovascular Consultants in December of 2012.  She loves taking care of patients in the office setting and establishing relationships with each and every one.




Eric – Registered Cardiac Ultrasonographer
Information Technology Liaison

Eric is originally from Melbourne, FL and has been in the Cardiology field since 1991.    His education initially began there in 1990 at Brevard Community College and transitioned to the United States Army Academy of Health Sciences in San Antonio, TX where over the next several years he attained his credentials (RCS, RCIS) and certifications as a Cardiovascular Technology specialist.  He also received a Bachelor of Science degree in 2001 from Montana State University – Billings in Management and Communications.  Past work experience has included supervisory and management level roles in the military, at Billings Clinic and most recently with the Yellowstone Heart Center. Eric has a passion for food and recognizes the need for exercise.   He enjoys racquetball, skiing, cycling, lifting weights, home projects, playing the piano and spending time with his daughter.


Ross – Certified Nuclear Medicine Technologist

Ross was raised in a farming family from Hazelton, North Dakota.  He attended the University of Mary in Bismarck, ND  in 2002 where he majored in Radiologic Technology.  Upon his graduation in 2006, he furthered his educational training over the next two years at the Mayo Clinic in Rochester, MN  in their Nuclear Medicine program. He joined CardioVascular Consultants at its inception in 2009.  Ross  enjoys spending time with his wife and family, especially being outdoors, whether it is skiing, snowmobiling, hiking, or hunting.