Our Staff

Dr. Robert Hernandez, MD

Medical Director

As medical director at The Haven, Dr. Hernandez oversees all patient care and is responsible for the overall wellbeing and recovery of our clients. With over 20 years of experience as an internist in the field of addiction medicine, Dr. Hernandez brings a wealth of experience, knowledge, and passion to
helping those who are struggling with alcoholism and drug addiction.

After receiving his undergraduate degree from the University of
Tulsa in Tulsa, Oklahoma, Dr. Hernandez earned his medical degree from the University Of Oklahoma College Of Medicine in 
Norman, Oklahoma. He completed his residency in internal medicine at the University Of Oklahoma Health Sciences Center in Oklahoma City. Dr. Hernandez has served as the vice president of the Grayson County Medical Society and is a member of several professional organizations, including the American College of Physicians and the American College of Emergency Physicians.

In his leisure time, he enjoys serving his community and spending time with his family. A fine wine enthusiast who loves to cook, Dr. Hernandez also enjoys gardening and playing golf.

Katrina Petersen

Program Director

Katrina Petersen brings over 15 years of experience to The Haven, having spent her entire nursing and administrative career focused on detox and addiction medicine. Her passion and focus for helping the underserved community is unmatched, garnering her the love and respect of both clients, and the 25+ Doctors and nurses she leads.

Ms. Petersen’s responsibilities include staffing and training, interfacing with hospital administration, and working with the entire medical team to ensure the Havens clients not only receive the best available medical care but are comfortable and treated with the respect and dignity they deserve.

Having led nursing and medical teams at Homeward Bound, Phoenix House, The Right Step, and Serenity Crisis, Katrina’s wealth of knowledge and experience are unmatched, making her the ideal leader for Team Haven.

Raegena Phelps

Discharge Coordinator

Having an organized, compassionate, and knowledgeable discharge planning team is at the heart of any great Detox, and this is where Raegena Phelps and her team come in.

When a client arrives, Raegena and her team go to work. They begin by speaking to the client and finding out what they want and what they may have tried or not tried before. Based on the client’s desires, schedule, Insurance, and resources, they put together a list of options for the next level of care.

The team will contact facilities, make introductions, talk to the client about what to expect, and organize transportation to make sure the client arrives at their chosen destination safely.


© 2020 by The Haven 

Haven Health Services - 500 N. Highland, Sherman, TX 75092