Meet the Team

Oswaldo Grenardo, MD

Medical Director

Oswaldo (Ozzie) Grenardo, MD, MBA, MSHA, enjoys building life-long relationships with his patients. His medical interests include health disparities, diversity issues and health care administration. He is passionate about being involved in his community and completed rural outreach work in southeast Colorado for several years.
After graduating from Stanford University with a degree in human biology, Dr. Grenardo moved back to Denver to work in health care administration, earning a combined Master of Science in Health Administration and Master of Business Administration from the University of Colorado. He went on to earn his medical degree from the University of Colorado and completed his internship and residency training in family medicine through the University of Colorado at Rose Medical Center. He serves as Vice Chair of the Centura Health Physician Group Board of Directors and Chair of the Board’s Quality Committee.
Outside of work, Dr. Grenardo enjoys spending time with his college-aged daughter and large blended family. He likes playing sports and was a scholarship football player at Stanford University for four years. As a Colorado native, Dr. Grenardo is also a fervent fan of the Denver Broncos and Denver Nuggets.

Kevin Harsh


I received my Master’s and Doctoral degrees in family nursing from the University of Colorado at Colorado Springs as well as Psychiatric training from Liberty University in Virginia. I have 24 years of experience in mental health and psychotropic medication management. I am also board certified as a Family Nurse Practitioner and provide primary care services in the local area. I am passionate about my work and love what I do. My interests are Medicine / Nursing, family, photography, astronomy/astrophotography, theoretical physics, aviation, and botany.

Meryl Dohrmann

Licensed Psychologist

Meryl Dohrmann is a native of Colorado. He earned a Master’s Degree in Counseling from Adams State College in 1993 became an LPC in 1995. He worked at Colorado Boys Ranch in La Junta from 1993 and transferred to the Colorado Department of Corrections in 1996. While there, he started a doctoral program at the Colorado School of Professional Psychology, which became the University of the Rockies.
He graduated from that program in 2009. He has worked in community mental health at Aspen Pointe in Colorado Springs and is currently a supervising Psychologist at the Colorado Mental Health Institute Pueblo. He has been and adjunct faculty at the University of Phoenix and Colorado Christian University. He has provided services at Ryon Medical since 2017.

Amber Pisano


Amber grew up in La Junta and graduated from La Junta High School. Amber has a Bachelor’s degree and a Master’s degree from Adams State Univerity. Amber is a Licensed Professional Counselor and splits her time between Ryon Medical and private practice in Colorado Springs. Amber is very passionate about mental health services and ensuring that every person has access to the help they need. She believes in the power of change to help individuals create the life they dream of. Amber has training in EMDR and other specialized training to help address the needs of her clients.

Carole McVicker

MA, Registered Psychotherapist, Behavioral Health Administrator

My name is Carole McVicker, and I am the Behavioral Health Administrator at Ryon Medical. I was born and raised in Southeastern Colorado. I have been serving the needs of this community for more than 30 years. I have a bachelor’s degree in Education and a Master’s degree in Special Education. I have also completed coursework in Clinical Mental Health Counseling. I have always wanted to serve others and have been doing so for most of my life. I spent 33 years as a teacher in the La Junta area and then transitioned my career to Ryon Medical to continue fulfilling that dream of helping and serving those in need.

Rocky McVicker

MA, Registered Psychotherapist

I am Rocky McVicker, and I look forward to helping you live your best life possible! I was born in Lamar and graduated from Wiley High School, and did undergraduate work at Adams State when it was still a college. I was a teacher for 30 plus years and earned a Master’s degree from Adams State after it changed to a University! I am a certified psychotherapist and have been working at Ryon Medical since it opened in November of 2012. I am a dedicated husband, father, grandfather and will be a dedicated therapist for you!

Tom Meardon

MA, Registered Psychotherapist

Tom is a retired school administrator with a Masters’s degree in counseling. Tom’s wife watches their grandkids two days a week, so Tom provides therapy in local schools and mentors a few students at Las Animas Elementary.  Tom enjoys spending time with his family, camping with his wife, and meeting new people.

Dara Randel


Allison Nelson

Telehealth Therapist , MSW, LSW

Hello, I am Allison, and I am a licensed clinical social worker. I grew up in North Dakota but earned my Master’s degree at Arizona State University, specializing in mental health and substance abuse. Soon after that, I moved here to CO, where I currently live in Littleton, and this is where I plan to stay. I am a mom to two great boys and two great dogs. I am a massive fan of the Colorado Avalanche, and I love being outside, even if it’s just to my backyard.

Sue Binder was born in Denver, Co. After high school, she gravitated to Southeast Colorado, where she met her husband and attended Lamar (then) Junior College, majoring in Journalism. She then devoted much of her time to raising her four children but returned to college at age 42. She now holds two Master’s, one in Humanities and the other in Counseling. Over the years, she has worked as an Avon lady, a distributor of toys, and has taught a variety of classes at the community college. She has also worked as a newspaper reporter and editor hperated her own counseling agency, and worked for 13 years as a licensed counselor in a prison. Currently, she is a Licensed Professional Counselor and Licensed Addiction Counselor.
In her spare time, she enjoys knitting, and crocheting and has been diagnosed with an Excessive Reading Disorder (just can’t get enough or read enough books). She also enjoys writing and calls that “my therapy.” She is an award-winning poet but writes in a variety of genres, including romance and short-story fiction. She is also the author of Hands Down, a Domestic Violence manual and its instructor’s guide, and her latest book is The Covid Bounce: Learning to Smile Again After the Pandemic.
Her pride and joy are her four children and five grandchildren, and her dog Tundra.

Heather Whisenand


Heather has always enjoyed working with people and helping them feel heard, so it was natural for her to pursue a career in counseling. Since 2014 Heather has worked in various capacities with children and families. This has deepened her interest in working with children, teens, and even young adults, through some of their toughest mental struggles and has worked in a therapeutic setting with patients since 2017. Heather likes to follow a person-centered, goal driven approach.

Heather enjoys spending time with her children, being involved in community events, and enjoys exercising in her spare time.

Dionysius Semien


Dionysius Semien

Hey there! My name is Dionysius Semien, but you can call me Mr. D. I am a Freshly-minted Social Worker holding a Master of Social Work from Baylor University and a Bachelor of Social Work from the University of Houston-Downtown. I am experienced in delivering end-to-end clinical care in diverse environments such as hospice, school based settings, and medical based settings. I am very passionate about serving at-risk youth and have choosen the person-in-environment theory as my professional modality.

Amber Settles, MSW

Amber Settles


Amber has a compassionate heart for others. She values human relationships, social justice, dignity, and the worth of others. She has a strengths-based approach that values the clients as the expert in their life. She has learned eight therapeutic modalities and realizes the importance of having a toolbox of modalities to work with others. Amber has worked with all ages and stages. She embraces Post Traumatic Growth and has been trained in Trauma-Focused Cognitive Behavioral Health.