Lifelong Pet Care

Not your average clinic. Our comprehensive veterinary approach accounts for your pet's individual lifestyle.

Providing thorough, thoughtful, compassionate, and high-quality veterinary care for the Greater Frazier Mountain Communities since 1989.

Together Let’s Care at Mountain Aire!

If you live in the Greater Frazier Mountain Area or the surrounding area in California, then you have picked the perfect site to find a veterinarian. Dr. Diane Cosko is a licensed veterinarian, treating all breeds of dogs and cats. Your pet’s health and well being is very important to us and we will take every step to give your pet the best possible care. If we can’t help you, we will work with you to help find someone that can help your pet.

Mountain Aire Veterinary Hospital, Inc. is a full service animal hospital and will take both emergency cases (during office hours) as well as less urgent medical, surgical, and dental issues. Dr. Diane Cosko is experienced in all types of conditions and treatments. Beyond first rate pet care, we make our clinic comfortable and informative. We want your 4-legged family member to look forward to meeting his or her own Greater Frazier Mountain Area veterinarian.

Our Services

What We Do

Cat Services

Mountain Aire Veterinary Hospital specializes in many cat health services for cats of all ages, breeds, and circumstances.

Anesthetic-Free Dentistry

For our qualified patients, we offer anesthetic-free dentistry. This reduces risks and side effects of anesthesia, making it a more pleasant and safer experience for your pet.

Dog Services

Our approach to canine veterinary medicine revolves around a comprehensive, competent, and compassionate care program.

Our Clients say...

Dr. Diane Cosko and her talented staff have been caring for our pets for decades. They go the extra mile every time. Very thorough and knowledgeable.
Alice C.

Every doctor should be as committed to their patients as Dr. Cosko is. I completely trust her and if she says something needs to be done, you can rest assured it’s in the best interest of your pet.
Amy B.

Our family has been a client of Mountain Aire for almost 20 yrs. Dr. Cosko is an excellent veterinarian and I appreciate the care she and her friendly staff have given all of our animals during this time. We are blessed to have access to such a fantastic veterinary hospital here in our mountain communities!
Melodie S.

My pet is well cared for and we felt the love for our little dog. We appreciate all of the staff. We are on the mountain part-time and it certainly feels great to have a veterinarian while we are there.
Tony H.

Has been my vet for over 20 years. The team and Dr. Cosko are caring and kind. I have since moved away from Frazier Park but Dr. Cosko and Mountain Aire are still my vet.
Patti J.

The care we receive at Mountain Aire is excellent. Our questions and concerns are always answered promptly. Any time we have brought our pets in they have been provided with knowledgeable and professional care.
Thomas B.

Everyone at the clinic were kind and empathetic of my beloved dog’s distress as well as my worries about her. I felt that my dog’s health and well-being were a priority for them and I felt very comfortable leaving her there for a few hours.
Cindy H.

Everyone in the office was very friendly and professional. I had to leave little Alex at the client for observation all day but I knew he was in safe hands.
Dionne B.

I have never been so impressed with a veterinarian and her staff before. The Mountain Aire staff are truly caring people. They went out of their way to make sure Basil (my sweet dog) was getting the best treatment possible and also, with great patience, explained to me the things I did not understand. My only disappointment is that they do not take humans as patients – If only I could find such a thorough doctor for myself!
Susan T.

One of the reasons I bring my dogs to Mountain Aire is because of the doctor and her staff. They genuinely care about your pet and both our dogs get excited to come to visit.
Katherine S.