Animal Medical Centers of Loudoun


Kaitlin Arntzen, DVM


Dr. Katie was born and raised in Massachusetts.  She had a variety of pets growing up including dogs, small mammals, and reptiles.  She knew from a very early age that she wanted to someday become a veterinarian.  Pursuing her dream, Dr. Katie grew up and attended Tufts Veterinary School near Boston.  During her time at Tufts, she worked at the wildlife clinic helping to rehabilitate sick and injured wildlife.  She also spent time in South Africa working with a wildlife veterinarian, caring for animals such as elephants, lions, and rhinos.

After veterinary school Dr. Katie completed a one year internship to further her training in the veterinary profession.  During her internship she worked at a busy emergency hospital caring for dogs, cats, and exotic animals in Tucson, Arizona.  She also helped take care of the local zoo animals.  Dr. Katie enjoyed her internship so much she was asked to stay on and continued working in Tucson in general practice medicine for the next two years.

While she loved working in Tucson, Dr. Katie missed her family and friends on the east coast.  In 2015 she and her husband relocated to Vermont where she spent 2 years in general practice.  They have recently relocated to the Ashburn area following a promotion.  While she will always treasure her adventures working with wildlife and zoo animals, she has found she prefers her cat and dog patients who she can interact with awake!  She still has a passion for exotic pets and treats small mammals, birds, and reptiles.  Her areas of interest include dermatology, dentistry, and infectious disease. 

Dr. Katie and her husband share their home with a motley crew of animals.  This menagerie includes a one eyed, toothless wonder cat, Zakk, and his sister Gweny.  There is also Mr. Buttons, a cat with spinal deformity (manx syndrome) who hops like a rabbit!  Let’s not forget her first love, a super snuggly rescue terrier, named Peaches.  In Dr. Katie’s spare time she enjoys skiing, riding her bike, and travelling. 

Our team wouldn’t be complete without Dr. Katie.  She brings a smile to work with her every day.  She is easy going and a lot of fun to work with.  She has proven herself to be an amazing doctor with an extensive knowledge base and to have a caring and empathetic nature.  She brings comfort and compassion to her patients and our clients love her. 


Ashburn Farm
43330 Junction Plaza Blvd, Suite 172
Ashburn, VA 20147

Phone: 703-726-8784
Fax: 703-327-8610

42385 Ryan Rd, Suite 112
Ashburn, VA 20148

Phone: 703-327-8471
Fax: 703-327-8610

Hours of Operation

Mon-Fri 7am to 7pm
Saturday 8am to 1pm
Sunday Closed

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