Meet Our Providers

William J. Adair, M.D.

William J. Adair, M.D. received his B.S. in Pre-Medicine from Juniata College in 2000, with cum laude honors. He received his medical degree from Jefferson Medical College in 2004 and completed his residency at Exela Health Latrobe Area Hospital in Latrobe in 2007.

In July 2007, Dr. Adair joined Gettysburg Family Practice. He is Board Certified in Family Medicine and is an active member of the American Academy of Family Practice.

Dr. Adair resides in the Gettysburg area with his wife, Charity and three children.

Paul Quesenberry, MD, FAAFP.

Paul Quesenberry, MD, FAAFP, has been a practicing Family Physician for 30 years. He completed his undergraduate Chemistry degree at Messiah College in 1986. He completed Medical School at the Medical College of Virginia/Virginia Commonwealth University in 1991 after a year of research at the National Cancer Institute in Frederick, Maryland. He completed his Family Medicine residency at the Riverside Regional Medical Center in Newport News, Virginia, in 1994. He entered practice at Cumberland Valley Family Physicians in Chambersburg, Pennsylvania, where he practiced for 25 years. For the first 11 years of practice in Chambersburg he enjoyed both inpatient hospital work and low risk Obstetrical care. For the past five years, Dr. Quesenberry has been in Hagerstown, Maryland, founding the Meritus Family Medicine residency program which is educating Family Physicians to build the regional work force of primary care physicians. He is excited about returning to practice and joining the group in Gettysburg. He enjoys all facets of Family Medicine including preventive health, care of children, procedures, management of chronic diseases, behavioral health, and acute care. He also enjoys medical education and bringing excellence to patient care.

He is married to Marsha and lives in Chambersburg, Pennsylvania. He and Marsha have 6 children and 3 grandchildren. He enjoys being with family, music, being outdoors, staying active, and connection with his church.

Kristi L. Allen, CRNP

Kristi Allen, CRNP, received her BA in Biology from Gettysburg College in 2000 and her BS in nursing from York College in 2002. She worked as an ED nurse in both Carlisle and Gettyburg hospitals as well as Clinical Documentation for Wellspan. She received her MS in nursing from Walden University in 2017. She joined Gettysburg Family Practice in 2018, after a preceptorship during her schooling.

Kristi is certified by, and a member of AANP (American Academy of Nurse Practitioners). She also holds certifications in PALS and ACLS. She resides in the Fairfield area with Roy and their two children.

Melissa K. Ashton, MPAS, PA-C

Melissa C. Kaminski, MPAS, PA-C received her B.A. in Pre-Physician Assistant Studies from Marywood University in 2015 and her M.S. in Physician Assistant Studies from Marywood University in 2017. After graduation she joined UPMC Pinnacle Hanover Express Care. Melissa joined Gettysburg Family Practice in February 2019.

Melissa is certified by, and a member of AAPA (American Academy of Physician Assistants). She also holds certifications in CPR and BLS. She resides in the Hanover area with her fiance and two dogs.

Justine A. Smith, CRNP

Justine Smith, a Certified Family Nurse Practitioner, has been a Registered Nurse since 2006. She earned her Associate Degree in Nursing in 2006 from Penn State University Mont Alto campus and then her RN-BSN in 2019 from Penn State University World Campus. In March 2023, Justine earned her Master’s in Nursing from Chamberlain University. Justine Is certified and a member of the American Academy of Nurse Practitioners. She holds Basic Life Support Certification. Most of Justine’s career has been spent caring for women and children in both the inpatient setting on labor and delivery and pediatrics and outpatient OBGYN office. She also has worked as a public health nurse serving pregnant woman and their children up until the age of 2 in a home visiting setting. One of the main reasons why Justine wanted to become a Family Nurse Practitioner is so that she can develop relationships with her patients over their lifetime.

Justine lives in Chambersburg PA with her husband, 2 children, and three dogs.

Louisa Rahner, DO

Louisa Rahner DO, completed her BS in Biology with minors in Chemistry and Spanish in 2014. She completed her osteopathic medical degree at the Philadelphia College of Osteopathic Medicine in 2018 before proceeding to complete her family medicine residency in Reading, PA at Reading Hospital Tower Health in 2021. She then practiced in Doylestown Pennsylvania until Fall of 2024 and has now returned to her hometown of Gettysburg Pennsylvania. She is excited to join Gettysburg Family Practice and to care for the community that she has always considered home.

She is Board Certified in Family Medicine and maintains memberships with American Academy of Family Physicians, American Osteopathic Association, and the American College of Osteopathic Family Physicians.

She lives in Gettysburg, PA with her husband and 2 children.