Meet the Team

Dr. Jay Gregson, MD

Jay Gregston, MD

Position: Medical Director

Focused Adult is proud to have Jay Gregston, MD as our medical director and primary physician. Dr. Gregston, a life-long Oklahoma resident, graduated from the University of Oklahoma College of Medicine in 1996 and completed his residency in 2000. He has been practicing as a Board Certified physician, in Oklahoma, for the past 19 years. He has a special interest and passion for treatment of ADHD due to seeing the benefits of successful treatment in his own family.

Dr. Gregston enjoys planning and leading medical mission trips to Uganda through Due Unto Others, a non-profit that he has directed since 2013. He is a member of the Attention Deficit Disorder Association and is certified by Institute of Certified ADHD Professionals.

Sheri Clanin

Sheri Clanin

Position: Clinical Director

Sheri Clanin has lived in Oklahoma City for the majority of her life where she has been in health care for the past 26 years. Her experience has lead her to caring for patients through all phases of life. She is passionate about serving her patients and meeting their healthcare needs.

Sheri enjoys pouring into the lives of her loved ones through friendship and mentoring. When she’s not at a beach you can find her in a good book.

Keith Jarrett Cook MA, LPN

Keith Jarrett Cook

Position: MA, LPN

Jarrett Cook has worked in mental and physical health for over 30 years with experience ranging from primary medicine to the severely mentally ill. He has found purpose and fulfillment of faith in providing service to people in need.

Jarrett enjoys reading, swimming and racquetball and finds his greatest joy in his roles as husband and dad.