North Deering Veterinary Hospital

Is this your veterinarian?

456 Auburn Street
Portland, ME 04103

Driving Directions

(207) 797-4855


  • Hours:
  • Mon-Fri: 8:00am - 6:00pm
  • Sat: 8:00am - 4:00pm
  • Sun: Closed
  • After Hrs ER: AEC 739 Warren Ave., Portland
  • (207)-878-3121

At North Deering Veterinary Hospital, we understand that your pets are an important part of your life. Our highly trained staff will treat you and your pets with professionalism and courtesy while providing you with the very best veterinary care available. Our full-service practice offers a variety of services intended to promote your pet’s overall health and longevity. It is our privilege to care for you and your pets, so call today to learn about our services or schedule an appointment.

North Deering Veterinary Hospital Services

  • Behavioral Medicine
  • Dental Care
  • Fully Stocked Pharmacy
  • Hospice and Euthanasia Services
  • Internal Medicine
  • Microchipping
  • Nutritional Counseling
  • Ophthalmology
  • Pain Management
  • Parasite Prevention and Control
  • Puppy and Kitten Care
  • Radiology (X-Rays)
  • Senior Care
  • Surgery
  • Ultrasound
  • Vaccinations
  • Wellness Exams

North Deering Veterinary Hospital Staff Profiles

Mark Mills, VMD

Dr. Mark Mills graduated from the University of Pennsylvania - School of Veterinary Medicine in 1992, after completing his undergraduate and graduate training at Lehigh University and Drexel University. Originally from Pennsylvania, he joined North Deering in March of 1996. At the practice, his main interest is internal medicine, especially endocrinology, but he enjoys seeing all cases and pets (though he has a soft spot for Labs and Goldens). When not at North Deering, he enjoys spending as much time as possible with his wife and two children, as well as his two rescue cats, Max and Pip(squeak). He also enjoys music, reading, hiking, and is vaguely ashamed of playing far too many computer games. Show More

Years in Practice: 24

University of Pennsylvania

Samantha Keenan, DVM

Dr. Keenan grew up in the Philadelphia area and received an undergraduate degree at Delaware Valley College in Doylestown, PA in Animal Science. She graduated from Atlantic Veterinary College in 2004, and has lived in Maine for 5 years. She shares her home in Gorham with her husband and their three daughters. Dr. Keenan also has 3 crazy cats and 1 Goldendoodle puppy.

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Years in Practice: 12

Atlantic Veterinary College

Dr. Pat Chase, DVM

Dr . Chase was raised in a large family in Hamden, Conneticut.  She attended Quinnipiac College (now University) in Hamden, graduating with a Bachelor of Science Degree in Animal Technology in 1979.  Pat worked at various local veterinary hospitals as a Veterinary Technician prior to attending Mississippi State University, College of Veterinary Medicine.  She received her Doctorate of Veterinary Medicine  in 1990, and she moved to Maine that same year to marry Daniel Chase.  Dr. Chase worked at various veterinary hospitals in the Portland area prior to becoming an associate at Cumberland Animal Hospital from 1995 to 2012 . In 2012, Dr. Chase joined North Deering Veterinary Hospital as a full time associate.  Dr. Chase strives to assist owners in optimizing the health and quality of life of their pets through preventative care, quality medicine and respect for the clients' individual concerns and lifestyles.  She lives with her husband Dan, children Allison and Nolan and a dog, cat and cockatiel.   We are thrilled to have her at our practice. Show More

Years in Practice: 26

Mississippi State University , College of Veterinary Medicine