Our Doctors

An in-depth look at our doctors and their experience and skills.


Kirk Hassinger, VMD

Born and raised in central Pennsylvania, Dr. Kirk Hassinger graduated from Franklin & Marshall College. He then attended the University of Pennsylvania School of Veterinary Medicine and graduated in 1990. After two years in private practice, he returned to the University of Pennsylvania to complete a year-long internship in internal medicine/surgery where he was awarded Intern of the Year honors. In 1996, Dr. Hassinger completed a three-year surgical residency at the University of Pennsylvania School of Veterinary Medicine where he earned the Jacques Jenny Orthopaedic Resident Award.

Dr. Hassinger has served the veterinary community of Northeast Pennsylvania for thirteen years, providing expert surgical services and lecturing to local veterinary associations. Dr. Hassinger has also lectured to various veterinary organizations throughout the nation on various surgical topics. He has also published articles on hip dysplasia and a rare form of intestinal entrapment.

Although Dr. Hassinger enjoys all areas of surgery, his special interests include joint surgery and fracture repair. Dr. Hassinger is a member of the Veterinary Orthopaedic Society, American Veterinary Medical Association, and the Northeast Veterinary Medical Association. In his free time, he enjoys spending time with his wife and children. He also enjoys playing and following all sports, especially Penn State football.

Jessica Manning,VMD

Dr. Jessica Manning is a Pennsylvania native, having been born, raised and educated within the state. She attended both Temple University and Penn State University for undergraduate studies and graduated from the University Of Pennsylvania School Of Veterinary Medicine. She is especially interested in emergency and critical care medicine because of the need for problem solving under often dynamic circumstances. She also enjoys emergency medicine because it allows her to support her animal patients and their human companions in times of difficulty.
Dr. Manning gained experience working as a technician at local emergency and day practices throughout her undergraduate and veterinary school years. Dr. Manning’s special interests include acute trauma, pain assessment and management, internal medicine, and in her spare time, she consults with Manning Farm Dairy on their dairy cattle nutrition formulation program. She practices medicine with a strong focus on preventative medicine and client education. She currently resides on the farm with her husband, a cattle dog and two pugs and their three domestic short hair cats.

Johnattan Arango,DVM

Dr. Arango immigrated from Colombia in August of 2000. As such, he is fluent in English and Spanish. He attended the University of Florida for his undergraduate studies and veterinary school, earning his DVM in 2012. He then spent a year at The Ohio State University Veterinary Medical Center as a small animal medicine and surgery rotating intern. Dr. Arango then returned to Florida to complete a surgical internship at Hollywood Animal Hospital. He spent the next three years at the Oklahoma State University Center for Veterinary Health Sciences completing a surgical residency. Dr. Arango enjoys all aspects of veterinary surgery, but he is especially interested in fracture repair and other areas of orthopedics. When not at work, Dr. Arango enjoys spending time outside with his girlfriend, Kristen, and their dogs Eddie, Siena, Luna and Mason. Dr. Arango also enjoys cooking and brewing his own beer at home.

Susan Leonard, DVM, ACVECC

Dr. Leonard received her veterinary degree from the University of Illinois in 1988. She completed her internship at Michigan State University in 1989 and continued on to complete her residency at the Veterinary Institute of Trauma, Emergency and Critical Care in Milwaukee, Wisconsin. Dr. Leonard’s special interests include nutrition, pain management, and intensive care nursing techniques.

Darrick Yamaguchi, DVM

Born and raised in Los Angeles, Dr. Darrick Yamaguchi majored in Animal Science at California Polytechnic State University of San Luis Obispo. Among his accomplishments, Dr. Yamaguchi completed thorough externships at VCA Veterinary Specialty Center in Seattle, Washington and Animal Specialty and Emergency Center in Los Angeles, California while working as a veterinary technician for 2 yrs during his college years. He received his Doctor of Veterinary Medicine degree from Kansas State University in 2013.

Dr. Yamaguchi enjoys traveling and has studied abroad in Southeast Asia (Vietnam, Cambodia, Singapore, and Malaysia).

Tiffany Clarke, DVM

Dr. Clarke is originally from New Jersey but moved to North East Pennsylvania to complete her undergraduate degree. She obtained a Bachelor of Science in Biology from Misericordia University and her veterinary degree from St. George’s University School of Veterinary Medicine. Dr. Clarke completed her clinical training at Cornell University and an emergency and critical care externship at both Garden State Veterinary Specialists and Northeast Veterinary Referral Hospital. Prior to and during veterinary school Dr. Clarke was a veterinary technician where she gained valuable experience and refined her technical skills.When Dr. Clarke isn’t working she enjoys spending time with her friends, family, and pets. She has five cats (Abbey, Milo, Oliver, Gus Gus, and Beard) and a puppy named Theodore. Dr. Clarke has traveled through much of the Caribbean and hopes to one day travel through Europe.

Jonathan Goodwin DVM, MS, DACVIM - Cardiology

Dr. Jonathan Goodwin was raised in Detroit, Michigan. He received his Doctorate in Veterinary Medicine from Tuskegee University and completed his cardiology residency at Purdue University.

Dr. Goodwin specializes in congenital cardiac disease (birth defects), pulmonary hypertension, feline myocardial disease, cardiac arrhythmias, and personalized management of congestive heart failure.

Helen Crabtree, DVM

After graduating from Louisiana State University’s veterinary medicine program, Dr. Helen Crabtree pursued an advanced degree as a Certified Canine Rehabilitation Practitioner through the University of Tennessee. She was drawn to veterinary medicine through the challenge of diagnosing patients, and she greatly enjoys the process of restoring mobility in pets that have suffered from injury or illness. Dr. Crabtree lives in the Poconos with her coonhound, Julian, and two tortoises, Frank and Ernest.

Kristin Edwards, VMD

Dr. Edwards was raised in Newtown Square, Pennsylvania. She was graduated from Haverford College with a BA in molecular biology in 1986 and received her VMD from the University of Pennsylvania in 1990. She was certified in veterinary acupuncture through the International Veterinary Acupuncture Society (IVAS) in 1999. Acupuncturing dogs, cats, and horses (along with some goats, chickens, and cows) has been the main focus of her life since then. She is a member of IVAS and the American Academy of Veterinary Acupuncture (AAVA). She has been on the CE Committee and has been approving all CE for IVAS for the last 9 years. She was chairman of the committee for 8 years. Dr Edwards also served on the AAVA HoD to IVAS for 2 years. When not needling animals, she enjoys spending time with her family, riding her horses, hiking, baking and being outside.

Frank Von Esse, VMD,DABVP

Dr. Von Esse came to the United States from Europe when he was 3 years of age. He has lived in many places in the US, including New York City, Boston, Colorado, and San Diego. He attended college in Boston, majoring in physics and mathematics, and moved to Pennsylvania to attend the University of Pennsylvania School of Veterinary Medicine. He has been a PA resident ever since. Dr. Von Esse graduated from vet school in 1999 and has been a full-time emergency vet since 2000, practicing at several referral-emergency facilities in the Philadelphia area. He achieved diplomat status with the American Board of Veterinary Practitioners in 2007. Professional interests include emergency surgery, traumatic injuries, and wound management. He has published articles in both physics and veterinary medicine. When not working, he enjoys time with his family, skiing, automotive racing, and general shenanigans with his kids. Dr. Von Esse is a nationally certified driving instructor.

Jessica R. Kinsey,  DVM, DACVS

Dr. Kinsey is originally a native of the Northeastern Ohio countryside. As a 2008 graduate of Michigan State University, she considers herself a proud Spartan. After graduation, Dr. Kinsey completed an internship at Carolina Veterinary Specialists, a specialty internship at the Virginia-Maryland College of Veterinary Medicine, and a surgical residency at Hope Veterinary Specialists. Dr. Kinsey enjoys all aspects of veterinary surgery, but takes special interest in congenital vascular anomalies, hepatobiliary disease, and surgical oncology. Dr. Kinsey is also trained to perform the TPLO procedure. In her spare time, Dr. Kinsey enjoys outdoor adventures, international missions, and just spending time with both her human friends and four-legged companions, Gregor and Gremlin.

Robert Runde, VMD

Leading our Internal Medicine Department is Dr. Robert Runde. He was born and raised in Africa and then moved to Boston where he obtained his Bachelor of Science in Biology from Boston University in 1996. In 2001 he was awarded his Doctorate of Veterinary Medicine from the University of Pennsylvania’s School of Veterinary Medicine. Following graduation he completed a small animal medicine and surgery internship at the Hollywood Animal Hospital in Hollywood, Florida. He completed Internal Medicine Residency training in August of 2010. Dr. Runde comes to us from AnimalEmergency and Referral Center, located in South Florida, where he has been practicing since 2003. He has over 8 years of experience in Internal Medicine and has a special interest in endocrinology, hyperbaric oxygen medicine,endoscopy, and advanced imaging. You may have read articles published by him in one of several veterinary magazines. Dr. Runde can also speak French, Spanish, and German

Christina Phillips, DVM

Dr. Phillips received her bachelors degree in Zoology from The Ohio State University in Columbus, OH. Post-baccalaureate, she performed biomedical research at Ohio State for the benefit of both human & veterinary medicine. She received her veterinary degree from St. George's University School of Veterinary Medicine in Grenada, West Indies. She completed her rotating internship at Purdue University College of Veterinary Medicine in West Lafayette, IN and then completed her surgical internship at VCA Alameda East Veterinary Hospital in Denver, CO. She has special interests in surgery, emergency, and exotics. She is very excited to begin hiking the Poconos and loves to raise orchids, read, dance, cook delicious vegan food, swim, and cycle. She is owned by two fabulous cats, Dragon & Basmati and is currently learning how to juggle.

Jessica Nord, VMD

Dr. Nord is a PA native who has always had a variety of academic interests. After nearly 10 years studying Latin and Ancient Greek, she graduated from the College of the Holy Cross in Worcester, MA, with a Bachelors Degree in Classics. She then matriculated to the University of Pennsylvania School of Veterinary Medicine, performing extensive research on working dogs, including a two-year, Department of Defense-funded study in partnership with U.S. Customs and Border Protection canine handlers at the U.S.-Mexico border. She was awarded the Elanco Excellence in Surgery prize upon graduation. After spending a year in Washington, D.C., completing a small animal rotating internship at one of the nation's busiest small animal hospitals, she joined the emergency staff of Northeast Veterinary Referral Hospital. Her professional interests include working and service dog medicine, wound repair and management, the human-animal bond, and adorable felines. While most of her free time seems to be spent cleaning up in the wake of her two bad cats' destruction, Dr. Nord does like to get outside, try new foods, read techno thrillers, and spend time with her significant other, who has become quite the cat whisperer himself."

Our Location

Northeast Veterinary
Referral Hospital

242 South River St. Suite 200
Plains, PA 18705


Emergency Hours:

We are open 24/7


Emergency Walk-Ins Welcome

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