CLINICIANS
Biddle Location
Affinia Healthcare provides trusted health services through highly qualified and dedicated professionals at our locations. These clinicians, working alongside our dedicated staff and volunteers, have received their training and certifications from some of the most highly regarded programs in the nation.
Dr. Amal Antoun
Pediatrics
Dr. Antoun graduated from the Ain Shams University, Faculty of Medicine, Abbasia, Cairo, Egypt . She specializes in Pediatrics.
Dr. Micaela O'Neil-Callahan
OB/GYN
Dr. O'Neil-Callahan earned her undergraduate degree from University of Wisconsin - Madison; medical degree from the University of Wisconsin - School of Medicine and Public Health; and completed her residency at Washington University. Dr. O'Neil-Callahan is board certified in obstetrics and gynecology.
Summer Boyer
Women’s Health Nurse Practitioner
Summer graduated with her BSN from Southern Illinois University - Edwardsville in 2000. She served as a Naval Nurse in the United States Navy. In 2011, Summer graduated from University of Missouri - St. Louis with a Master’s degree in Women’s Health.
Patrick Schoenwalder
Physician Assistant
Patrick Schoenwalder, PA-C, MPH, earned his undergraduate degree from Drury University; a Master of Public Health from University of Illinois-Springfield; and a Masters in Medical Science–Physician Assistant degree from Saint Louis University. Patrick is also a board-certified Clinical Laboratory Scientist.
Dr. Timothy McCann
Internal Medicine
Dr. McCann provides internal medicine services for patients age 18 and older. He is a graduate of the American University of the Caribbean and completed his residency at St. Luke’s Hospital.
Dr. Heba Sarhan
Dentist
Dr. Sarhan earned her undergraduate degree from Xavier University of Louisiana and her DMD from the University of Alabama at Birmingham. She also completed a general practice residency at Mercy Hospital St. Louis.
Dr. Vivian Knipp
Psychologist
Dr. Knipp earned her undergraduate degree from the University of Missouri-Columbia in Psychology. She also earned her master's and doctorate in Psychology from Saint Louis University.
Allison Andrelchik
Licensed Clinical Social Worker
Allison Andrelchik completed her bachelor's degree at San Diego State University and master's degree in Social Work at Washington University in St Louis. She has worked with Affinia Healthcare since 2019, and enjoys spending time outside in nature, with her animals or reading a book.
Rajeev John
Trama Informed Care Manager
Rajeev was born in India, where he earned his master’s in Social Work. He also has a MSW from Washington University. He joined Affinia Healthcare 32 years ago so that he could help people. When he’s not helping people, he enjoys traveling.
Emme Harms
LCSW
Emme earned her bachelor’s degree in psychology and Spanish from the University of Wisconsin La Crosse. She attended Washington University in St Louis where she studied social work. Emme specializes in diagnosis and treatment of young children and providing parent education and training and her specialties include anxiety disorders, ADHD, and Autism Spectrum Disorder.
Dr. Patrick Battaglia
Chiropractor
Dr. Patrick J. Battaglia is a clinician within Logan’s Integrative Heath Centers and assistant professor of radiology in the Doctor of Chiropractic program. He earned his Doctor of Chiropractic degree from Logan University in 2012, and subsequently completed a 3-year residency in diagnostic imaging, becoming board certified in chiropractic radiology in 2016. He has also completed a 1-year fellowship in diagnostic imaging, with emphasis on ultrasound of the musculoskeletal system. Dr. Battaglia’s clinical interests include assimilating chiropractic care into traditional multidisciplinary medical settings, and implementing diagnostic ultrasound into routine musculoskeletal practice. His research interests include studying the sonoanatomy of various musculoskeletal structures, especially important structures of the arch of the foot in people with flatfoot deformity.
Dr. Michele Abidin
Dental Director
Dr. Abidin earned her DDS at The Ohio State University and completed her residency in general dentistry at the University of Cincinnati.
Dr. Paul Bigg
Dentist
Dr. Bigg earned his DMD at Case Western Reserve University School of Dental Medicine and completed his residency in general dentistry at Erie County Medical Center in Buffalo, New York.
Amy Adams
Registered Dental Hygienist
Amy earned her bachelor's degree in Community/Public and School Health, and an associate's degree in Dental Hygiene. She has 20+ years in private and public health and dental hygiene experience and five years experience as a Dental Hygiene Educator at St. Louis Community College.
Sherrie Costello
Registered Dental Hygienist
Sherrie earned her RDH license in 2012 after she completed her associate's degree at St. Louis Community College at Forest Park. She has been in the dental field since 1990 and has worked in all aspects of the dental office. In her many years of dentistry, she has worked as a chairside dental assistant, front office assistant, office manager and clinical dental hygienist.
Dr. Brad Bush
Dentist
Dr. Bush received his DMD degree from Southern Illinois University-School of Dental Medicine.
Dr. Maggie Guan
Dentist
Dr. Maggie Guan earned her bachelor’s degree at University of California-Santa Cruz and her DMD at A.T. Still University.
Dr. Isaac Coronel
Dentist
Dr. Coronel earned his DMD at A.T. Still University through the Missouri School of Dentistry and Oral Health.
