Corporate
Karen L. Davis, RN, MBA
Executive Director
MBA: University of Louisville, Louisville, KY
Bachelor of Nursing: Spalding University, Louisville, KY
Juan Fraiz, CPA
Chief Executive Officer
Bachelor of Science: Accounting and Finance, Purdue University, West Lafayette, IN
Prior to joining PriMed, Juan served as Vice President Finance and Chief Financial Officer with Mt. Carmel Health Plans.
Jennifer Fuerst
Associate Director of Practice Operations
Bachelor of Science: Urbana University, Urbana, Ohio
Experience: More than a decade of management experience in corporate environments.
Amy J. Fuller
Director of Practice Operations and Interim Manager at PriMED Centerville Family Practice and Pediatrics
Associate Degree: Applied Science from RETS, Dayton, OH
Robert E. Matthews
VP Quality and Care Design
Served as PriMed Executive Director from 1996-2010
Robert E. Roettker, CPA
MBA: Finance and Information Systems, Xavier University, Cincinnati, OH
Bachelor of Science: Finance and Economics, Xavier University, Cincinnati, OH
Family Practice
Christie Bernard, RN
Practice Manager of PriMed Springboro Pediatrics, PriMed Wright Dunbar Family Practice and Pediatrics
Bachelor of Science: Nursing Degree, Wright State University, Dayton, OH
Mark A. Couch, MD
Board Certification: Family Medicine
Family Medicine Residency: Franciscan Medical Center, Dayton, OH
Medical Degree: Wright State University’s School of Medicine, Dayton, OH
Bachelor of Science: Manchester College, North Manchester, IN
As of May 31, 2022, Dr. Couch has retired. He continues to be involved at PriMED consulting with the clinical team; however, he no longer sees patients.
Amy Cox
Practice Manager of PriMed Englewood Pediatrics and Woodbury Family Practice
James A. Derksen, MD
Board Certification: Family Medicine
Family Medicine Residency: St. Elizabeth Medical Center, Dayton, OH. Chief Resident
Medical Degree: Wright State University’s School of Medicine, Dayton, OH
Bachelor of Science: University of Cincinnati, Cincinnati, OH
Dr. Derksen has announced his retirement. His last day to see patients is September 30. If you are a patient of Dr. Derksen, our office can assist you during this transition. Letters are currently being sent to patients, explaining your options. If you have questions or need assistance, please contact us.
Andrea Dillon, MD, MPH
Board Certified: Family Medicine
Family Medicine Residency: Good Samaritan Hospital, Dayton, OH
Medical Degree: Wright State University, Dayton, OH
Master of Public Health: Wright State University, Dayton, OH
Bachelor of Science: Manchester University, North Manchester, IN
Krista Ducklo, MSN, APRN, FNP-C
Board Certification: Family Nurse Practitioner
Master of Science: University of Cincinnati, Cincinnati, OH
Bachelor of Science: The Ohio State University, Columbus, OH
Jessica Emmons, MSN, APRN, FNP-C
Board Certification: Family Nurse Practitioner
Master of Science: University of Cincinnati, Cincinnati, OH
Bachelor of Science: Miami University, Oxford, OH
Janette R. Froehlich, MD
Board Certified: Family Medicine
Family Medicine Residency: St. Elizabeth Medical Center, Dayton, OH. Chief Resident
Medical Degree: University of Cincinnati College of Medicine, Cincinnati, OH
Bachelor of Science: University of Dayton, Dayton,OH
Amy J. Fuller
Director of Practice Operations and Interim Manager at PriMED Centerville Family Practice and Pediatrics
Associate Degree: Applied Science from RETS, Dayton, OH
Amanda Gedeit, DO
Board Certified: Family Medicine
Family Medicine Residency: Grandview Medical Center, Dayton, OH; Chief Resident
Medical Degree: A.T. Still University Kirksville College of Osteopathic Medicine, Kirksville, MO
Bachelor of Science: University of Wisconsin-LaCrosse, LaCrosse, WI
Thomas R. Greer, MD
Board Certification: Family Medicine
Family Medicine Residency: St. Elizabeth Medical Center, Dayton, OH
Medical Degree: University of Cincinnati College of Medicine, Cincinnati, OH
Bachelor of Science: Duke University, Durham, NC
Kristina Helmick, MSN, APRN, FNP-C
Board Certification: Family Nurse Practitioner
Master of Science: Walden University
Bachelor of Science: Wright State University, Dayton, OH
Thomas W. Hirt, MD
Board Certified: Family Medicine
Family Medicine Residency: Miami Valley Hospital, Dayton, OH. Chief Resident
Medical Degree: University of Cincinnati College of Medicine, Cincinnati, OH
Bachelor of Science: University of Dayton, Dayton, OH
Sandy Hofacker, CMPE
Practice Manager of PriMed Centerville Family Practice and Centerville Pediatrics
Training: Medical Office Assistant - Miami Jacobs Career College, Dayton, OH
Danielle King
Practice Manager of PriMed Beavercreek Family Practice and Beavercreek Pediatrics
Associates Degree: Medical Office Management, Ohio Institute of Photography and Technology, Kettering, OH
Zach Liapis, DO
Family Medicine Residency: Grandview Medical Center, Dayton, OH
Medical Degree: Doctor of Osteopathic Medicine, Lake Erie College of Osteopathic Medicine, Erie, PA
Undergraduate Degree: Bachelor of Arts, Hanover College, Hanover, IN
Brandi D. Minch
Practice Manager of PriMed Patterson Wood Family Practice and PriMed Neurology
Bachelors of Science: University of Dayton, Dayton, OH
Associates Degree: Ohio Institute of Photography & Technology
Maureen K. Perez, MD
Board Certified: Family Medicine
Family Medicine Residency: Miami Valley Hospital, Dayton, OH
Medical Degree: Medical College of Ohio, Toledo, OH
Bachelor of Science: Miami University, Oxford, OH
Dr. Perez announced her retirement from clinical medicine in this letter to patients.
William J. Randall, MD
Board Certification: Family Medicine
Family Medicine Residency: St. Elizabeth Medical Center, Dayton, OH
Medical Degree: University of Cincinnati College of Medicine, Cincinnati, OH
Bachelor of Science: University of Dayton, Dayton, OH
Yvonne Ridenour
Practice Manager of PriMed Huber Heights Pediatrics | Vandalia Family Practice
Bachelor of Science: Urbana University, Urbana, Ohio
Mark R. Schloneger, MD
Board Certified: Family Medicine
Family Medicine Residency: Miami Valley Hospital, Dayton, OH
Medical Degree: Wright State University’s School of Medicine, Dayton, OH
James F. Seiler, MD
Board Certified: Family Medicine
Family Medicine Residency: St. Elizabeth Medical Center, Dayton, OH
Medical Degree: Ohio State University College of Medicine, Columbus, OH
Laine D. Sommers, DO
Family Medicine Residency: Grandview Medical Center, Dayton, OH
Medical Degree: Doctorate of Osteopathic Medicine, Kansas City University of Medicine and Biosciences, Kansas City, MO
Master of Science: Biomedical Sciences, Kansas City University of Medicine and Bioscience
Undergraduate Degree: Bachelor of Science, University of Mount Union, Alliance, OH
Dr. Sommers is leaving PriMED, effective September 9, and will be joining a practice in the Vandalia area:
Gebhart Concierge & Consult
505 Corporate Center Dr.
Vandalia, OH 45377
937-684-4220
Marlon D. Twyman, MD
Board Certified: Family Medicine
Family Medicine Residency: Mercy Hospital, Toledo, OH
Medical Degree: Medical College of Ohio, Toledo, OH
Bachelor of Science: Washington University, St. Louis, MO
Teresa VanHoose, MSN, APRN, FNP-BC
Board Certification: Family Nurse Practitioner
Master of Science: Maryville University, St. Louis, Missouri
Bachelor of Science:Wright State University, Dayton, OH
**Teresa now sees patients at our Woodbury and Vandalia offices
Michael Witt, MD
Board Certified: Family Medicine
Family Medicine Residency: United Hospital Center, Clarksburg, WV
Medical Degree: University of Cincinnati College of Medicine, Cincinnati, OH
Bachelor of Science: University of Dayton, Dayton, OH
Megan Wurm (previously Dorsak), DO
Family Medicine Residency: Grandview Hospital, Dayton, OH, Chief Resident
Medical Degree: Univ. of Pikeville- Kentucky College of Osteopathic Medicine, Pikeville, KY
Bachelor of Science: Eastern Kentucky University, Richmond, KY
Internal Medicine
Marsha Cooper, MD
Board Certification: Internal Medicine
Internal Medicine Residency: Tulane University School of Medicine, New Orleans, LA
Internal Medicine Internship: Helene Fuld Medical Center, Trenton, NJ
Medical Degree: Drexel University College of Medicine, Philadelphia, PA
Bachelor of Science: Lincoln University, Oxford, PA
Dr. Cooper joined our office in mid-May. We are so glad she's now part of the Vandalia team, providing comprehensive, coordinated primary care.
Neurology
Brandi D. Minch
Practice Manager of PriMed Patterson Wood Family Practice and PriMed Neurology
Bachelors of Science: University of Dayton, Dayton, OH
Associates Degree: Ohio Institute of Photography & Technology
Ling Xu, MD
Board Certification: Neurology, Neurophysiology, Neuromuscular Disease and Electrodiagnostic Medicine
Fellowship: Neuromuscular disease/neurophysiology, University of Alabama, Birmingham, AL
Neurology Residency: St. Louis University, St. Louis, MO
Medical Degree: Xian Medical University, Xian, Shaanxi, China
Pediatrics
Rogelio "Sonny" Amisola, MD
Board Certification: Pediatrics and Obesity Medicine
Board Eligible: Adolescent Medicine
Fellowship: Adolescent Medicine, Schneider Children's Hospital, New Hyde Park, NY
Pediatric Residency: Beth Israel Medical Center, New York, NY. Pediatric Chief Resident
Medical Degree: University of the East, Ramon Magsaysay Memorial Medical Center, College of Medicine, Quezon City, Philippines
Bachelor of Science: School of Allied Medical Professions, University of the Philippines
Christie Bernard, RN
Practice Manager of PriMed Springboro Pediatrics, PriMed Wright Dunbar Family Practice and Pediatrics
Bachelor of Science: Nursing Degree, Wright State University, Dayton, OH
Debra E. Bockhorn, MD
Board Certified: Pediatrics
Pediatric Residency: Indiana University of Medicine, Indianapolis, IN
Medical Degree: Loyola University School of Medicine, Chicago, IL
Bachelor of Science: Ohio State University, Columbus, OH
Matthew W. Byers, MD
Board Certified: Pediatrics
Pediatric Residency: Kosair Children's Hospital, Louisville, KY
Medical Degree: The Ohio State University, Columbus, OH
Bachelor of Science: Wright State University, Dayton, OH
Amy Cox
Practice Manager of PriMed Englewood Pediatrics and Woodbury Family Practice
Caleb Dukeman, MD
Pediatric Residency: Kaiser Permanente Los Angeles Medical Center, Los Angeles, CA
Medical Degree: 2017 Wright State University Medical School, Dayton, OH
Bachelor of Science: Biological sciences, Wright State University, Dayton, OH
Bachelor of Arts: Spanish, Wright State University, Dayton, OH
Randy E. Eisenhut, MD
Board Certification: Pediatrics
Pediatric Residency: Columbus Children's Hospital, Columbus, OH
Medical Degree: University of Kansas Medical School, Lawrence, KS
Bachelor of Science: University of Kansas, Lawrence, KS
Amy J. Fuller
Director of Practice Operations and Interim Manager at PriMED Centerville Family Practice and Pediatrics
Associate Degree: Applied Science from RETS, Dayton, OH
Kathleen Gibbs, MD
Board Certification: Pediatrics
Pediatric Residency: Columbus Children's Hospital, Columbus, OH
Medical Degree: University of Cincinnati College of Medicine, Cincinnati, OH
Bachelor of Science: Ohio State University, Columbus, OH
Kathleen Gutman, MD
Board Certification: Pediatrics
Pediatric Residency: Geisinger Medical Center, Danville, PA
Medical Degree: Wright State University School of Medicine
Bachelor of Science: Kent State University, Kent, OH
Amy Hahn, LISW
Behavior Health Consultant
Master of Social Work: University of Cincinnati, Cincinnati, OH
Bachelor of Science: Wright State University, Dayton, OH
Experience: More than 20 years of Behavioral Health experience: acute inpatient setting, school counselor and outpatient counselor.
Matthew G. Hardwick, MD
Board Certification: Pediatrics
Pediatric Residency: Columbus Children's Hospital, Columbus, OH
Medical Degree: Ohio State University College of Medicine, Columbus, OH
Bachelor of Science: Walsh College, Canton, OH
Christopher Harper, MD
Pediatric Residency: Cincinnati Children's Hospital Medical Center, Cincinnati, OH
Medical Degree: University of Oklahoma College of Medicine, Norman, OK
Bachelor of Science: University of Oklahoma, Norman, OK
Special Interests: Pediatric sleep issues and social determinants of health
Sandy Hofacker, CMPE
Practice Manager of PriMed Centerville Family Practice and Centerville Pediatrics
Training: Medical Office Assistant - Miami Jacobs Career College, Dayton, OH
Michael Kessel, MD
Board Certification: Pediatrics
Pediatric Residency: University of Louisville, Louisville, KY
Medical Degree: Ohio State University School of Medicine, Columbus, OH
Bachelor of Science: Miami University, Oxford, OH
Dr. Kessel has decided to join Dayton Children's Hospital. He will see PriMED patients through September 15. Read more in this letter to patients.
Danielle King
Practice Manager of PriMed Beavercreek Family Practice and Beavercreek Pediatrics
Associates Degree: Medical Office Management, Ohio Institute of Photography and Technology, Kettering, OH
Lisa W. Klanke, MD, MS
Board Certification: Pediatrics
Fellowship: Anti-infective pharmaceutical research, University of Cincinnati College of Medicine, Cincinnati, OH
Master of Science: Environmental Health and Toxicology, University of Cincinnati College of Medicine, Cincinnati, OH
Pediatric Residency: Dayton Children's Medical Center, Dayton, OH
Medical Degree: Wright State University School of Medicine, Dayton, OH
Bachelor of Science: University of Cincinnati, Cincinnati, OH
Dr. Klanke has special interest in dermatology and urology issues.
Claire N. McDowell, MD, FAAP
Board Certification: Pediatrics
Pediatric Residency: Dayton Children's Medical Center, Dayton, OH
Medical Degree: Wright State School University School of Medicine
Bachelor of Science: Olivet Nazarene University, Bourbonnais, IL
Stephanie Morrison, MD, FAAP
Board Certified: Pediatrics
Pediatric Residency: Wright State University/Wright-Patterson Air Force Base, Dayton, OH
Medical Degree: Uniformed Services University, Bethesda, MD
Bachelor of Science: Arizona State University, Tempe, AZ
Dr. Morrison's office has moved. She now sees patients from PriMed Centerville Pediatrics.
Katherine Muse, MD
Board Certification: Pediatrics
Pediatric Residency: Stanford University, Palo Alto, CA
Medical Degree: Wright State University School of Medicine, Dayton, OH
Bachelor of Science: Bowdoin College, Brunswick, ME
Germaine Neh, MD
Pediatric Residency: St. Joseph University Medical Center, Paterson, NJ
Medical Degree: University of Buea Faculty of Health Sciences, Buea, Cameroon
Bachelor of Science: University of Buea, Buea, Cameroon
Linda E. Odenigbo, MD
Board Certified: Pediatrics
Pediatric Residency: Harlem Hospital Center, New York, NY
Medical Degree: University of Iloria, Nigeria
Alonzo Patterson III, MD
Board Certified: Pediatrics
Pediatric Residency: Columbus Children's Hospital, Columbus, OH
Medical Degree: University of Cincinnati College of Medicine, Cincinnati, OH
Bachelor of Science: Wright State University, Dayton, OH
Erin Perkey, DO
Board Certified: Pediatrics
Pediatric Residency: Nationwide Children's Hospital, Columbus, OH- Dual Chief Resident
Medical Degree: Ohio University College of Osteopathic Medicine, Athens, OH
Bachelor of Science: Miami University, Oxford, OH
Janelle Pool, MD
Board Certification: Pediatrics
Pediatric Residency: Dayton Children's Medical Center, Dayton OH
Medical Degree: Wright State University School of Medicine, Dayton, OH
Bachelor of Science: Olivet Nazarene University, Bourbonnais, IL
Yvonne Ridenour
Practice Manager of PriMed Huber Heights Pediatrics | Vandalia Family Practice
Bachelor of Science: Urbana University, Urbana, Ohio
Rachel Sidwell, MD
Board Certified: Pediatrics
Pediatric Residency: Cohen Children's Medical Center, New Hyde Park, NY
Medical Degree: University of Cincinnati, Cincinnati, OH
Bachelor of Science: Miami University, Oxford, OH
Kara Szlag, MD
Pediatric Residency: Nationwide Children's Hospital, Columbus, OH
Medical Degree: University of Louisville, Louisville, KY
Bachelor of Science: University of the Cumberlands, Williamsburg, KY
Divya Thomas, MD, MPH
Pediatric Residency: St. Louis University, St. Louis, MO
Medical Degree: M.S. Ramaiah Medical College, Bengaluru, India
Masters Degree: Public Health, Grand Canyon University, www.gcu.edu
John W. Thomas, MD
Board Certified: Pediatrics
Pediatric Residency: Wright Patterson Air Force Base, Dayton OH - Chief Resident
Medical Degree: University of Michigan Medical School, Ann Arbor, MI
Bachelor of Science: Penn State University, State College, PA
Tiffany Wissman, MD
Board Certified: Pediatrics
Pediatric Residency: Dayton Children's Medical Center, Dayton, OH
Medical Degree: Wright State University School of Medicine, Dayton, OH
Bachelor of Science: Xavier University, Cincinnati, OH
Research
Ann Trzaska Moell, MD
Working as an investigator with PriMed Clinical Research provides Dr. Moell with an exciting opportunity to participate in the process of innovation in the science of medicine. She is a graduate of The Ohio State University College of Medicine in Columbus. She returned to Dayton to continue her medical training with a residency at St. Elizabeth Medical Center. Dr. Moell has a special interest in women’s health and pediatrics.
Board Certified: Family Medicine
Family Medicine Residency Training: St. Elizabeth Medical Center, Dayton,
OH Medical Degree: The Ohio State University College of Medicine,
Columbus, OH Bachelor of Science: University of Dayton, Dayton, OH
Gilbert W. Templeton, MD, FACC
Board Certified: Internal Medicine, Cardiovascular Disease
National Board of Medical Examiners (Diplomat)
Fellowship in Cardiovascular Disease: Naval Hospital, Philadelphia, PA
Internal Medicine Residency: Naval Hospital, Philadelphia, PA
Medical Degree: Temple University School of Medicine, Philadelphia,
Bachelor of Science: Ursinus College, Collegeville, PA