Your pets are a part of our family!

Meet our Doctors and New Owners!
Dr. Patty Thongnamsap Dr. Andrea Hsu

Dr. Andrea was a second year student and Dr. Patty a new student when they met in veterinary school at UC Davis. Fate led them to be paired as “Big Sib” and “Lil Sib” in the program, and they have stayed true to their relationship since.

Dr. Andrea graduated from veterinary school in 2008 and afterwards completed an additional year of internship training at an emergency and specialty hospital in San Diego. She had such a great time at her internship, that Dr. Patty had to follow in her “Big Sib’s” footsteps to complete the same training program after she graduated from veterinary school in 2009.

Their friendship, experience, and shared dream to create a family and community focused veterinary practice led to their partnership at Animal Medical Hospital. They hope to share their love of pets with you.

Come Visit Us.
2116 E. Colorado Blvd, Pasadena, CA 91107

Contact Us:
Tel: 626.796.3019
E-Mail: hello@amhpasadena.com

Our Hours of Operations:

Monday 8:30 am - 7 pm
Tuesday 8:30 am - 7 pm
Wednesday 8:30 am - 7 pm
Thursday 8:30 am - 7 pm
Friday 8:30 am - 7 pm
Saturday 8:00 am - 6 pm
Sunday Closed


In Memorial of Dr. Dao Estacio
A presence of confidence, belief and action that transcended his few words...

Dr. Dioscoro Estacio opened Animal Medical Hospital in 1976. The youngest son of rice farmers in the Philippines, Dr. Estacio brought an intense work ethic to Pasadena, where his practice earned a reputation for an expert, versatile approach to veterinary medicine. Doctor and staff eschewed frills and margins in favor of a broad treatment suite, ranging from mundane vaccinations and rescues to the most complex surgical interventions. Dr. Estacio’s signature trait was an understated gravitas – a presence of confidence, belief, and action that transcended his few words. This endeared him to his ‘patients’ and their owners for 37 years. He maintained the practice throughout his marriage, the raising of five children, and the arrival of six grandchildren. And in July, 2013, at age 71, he performed his final task on earth: surgery on a pet cat.

Dr. Estacio’s passing left a void in his family and veterinary practice, both of which he loved and nurtured. But his values live on in both. Dr. Estacio’s heirs – the foremost keepers of his legacy – remain physically and philosophically invested in the clinic. And AMH remains Pasadena’s veterinary hospital, providing comprehensive care and respecting the deep, unspoken connections between humans and animals.

626.796.3019 hello@amhpasadena.com 2116 E. Colorado Blvd, Pasadena, CA 91107
TM + ©1976-2017 Animal Medical Hospital Pasadena. All Rights Reserved.