Platinum Team

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Christopher Abel, MDChristopher Abel, MD
Platinum Medical Director

Board Certification: Internal Medicine

Read Dr. Abel's Bio

Michael Chapman, MDMichael Chapman, MD
Platinum Physician

Board Certification: Family Medicine

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Emily Hebert, MD
Platinum Physician

Board Certification: Internal Medicine

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Steven Lilly, MD, MBASteven Lilly, MD, MBA
Platinum Physician

Board Certification: Internal Medicine

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Dr. Riva RahlRiva Rahl, MD
Platinum Physician

Board Certification: Internal Medicine & Emergency Medicine

Read Dr. Rahl's Bio

Roni Gonzalez-DunnRoni Gonzalez-Dunn
Platinum Executive Director

Roni joined Cooper Clinic in 1990 after graduating from Kansas State University with a Bachelor of Science in Exercise Science. She began as a Clinical Exercise Physiologist and was later named Senior Clinical Administrator before spearheading the development of Platinum. Her extensive knowledge of the Clinic is an invaluable asset to the Platinum team. Roni and her husband, Rick, have two daughters.

Amy HigginsAmy Higgins, RN, CCRN
Platinum Nurse

Amy joined the Platinum team in 2018 from Baylor University Medical Center where she served as a Trauma and Surgical ICU nurse for four years. Prior to her medical career, Amy was a lawyer and still holds her law license in Illinois. She earned a bachelor's degree in nursing from Baylor University, a bachelor's degree from the University of Kentucky and a law degree from Chicago-Kent College of Law. Amy and her husband have two daughters and a son. She loves traveling, outdoor activities and spending time with family and friends.

Arithia FranklinArithia Franklin
Patient Advocate to Dr. Abel

With more than 25 years' experience in health care Arithia joined Cooper Clinic in 2007 as an executive assistant and joined the Platinum team in 2018. This U.S. Army veteran and native Texan loves to travel and is an avid movie goer. Arithia is a certified U.S. Army telecommunications specialist, has completed Cooper’s Management Certificate Program and is a Cooper Aerobics Wellness Warrior. She loves spending time with her family which includes two children and two grandchildren.

Kendra HodgesKendra Hodges
Patient Advocate to Dr. Chapman

In 2016, Kendra joined Cooper Clinic as the radiology administrative assistant. She later transitioned to executive assistant for two Cooper physicians before joining the Platinum team in 2021. Kendra graduated from Texas A&M in 2014 with a Bachelor of Science in Kinesiology and completed her Master of Science in Healthcare Administration in 2021. Kendra is a huge football fan and can be found glued to a television every Saturday and Sunday cheering on her beloved Texas A&M Aggies and Dallas Cowboys. She also enjoys spending time with her parents and close friends along with traveling.

Erika KnaulsErika Knauls
Patient Advocate to Dr. Hebert

Erika joined Cooper Clinic Laboratory Services in 2014 and Platinum in 2018. She has a Bachelor of Science in Biology and Medical Technology and a Master of Arts in Human Resources Development. Before joining Cooper Clinic, Erika worked in health care for more than 15 years in Arkansas. In her spare time, Erika enjoys spending time with her family and watching her son play sports.

Susan RichardsSusan Richards
Patient Advocate to Dr. Lilly

With 15-plus years in health care—from administrative to medical technician—Susan joined the Platinum team in 2021. She previously worked in Cooper Clinic's billing department for five years and has a degree in business administration. Susan and her husband spend much of their free time traveling to watch their daughters play competitive soccer.

Rhett SaguiRhett Sagui
Patient Advocate to Dr. Rahl

With more than 15 years of experience in the medical field, Rhett joined Cooper Clinic in 2014 as the Cardiology Administrative Assistant and Phlebotomy Technician and Platinum in 2020. Prior to joining Cooper, he served as an EMT/Firefighter where he worked with an interagency “Hot Shot” crew fighting wildfires in the Western United States. Rhett is certified as a medical assistant and instructor for the American Heart Association Basic Life Support CPR classes. He enjoys traveling with his wife, Tandra, and their four children.

Jennifer EakinsJennifer Eakins
Assistant Patient Advocate

Jennifer serves part-time with the Platinum team assisting in all aspects of patient care. She has worked for Cooper Aerobics Center for 25 years and has a Bachelor of Science in Exercise Science. Passionate about education, Jennifer has taught American Heart Association CPR and Advanced Cardiac Life Support certification classes for more than 20 years. She also teaches Sunday School to children and leads Vacation Bible School at her church. Jennifer loves reading, being active with her three children and cooking with her husband.

Office Hours:
8 a.m.-4 p.m.

During office hours, please call the office first.

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Cooper Clinic Platinum
12200 Preston Road
Dallas, TX 75230
866.906.2667 (COOP)
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