Sunset Veterinary Center
Diamond Bar veterinary center offering preventive care, diagnostics, dental evaluation, ultrasound, pharmacy, cancer screening and end-of-life care, with published after-hours emergency referrals.
Verified with 2 sources · October 20, 2026 What this means
Contact and location
838 N Diamond Bar Blvd, Diamond Bar, CA 91765
Call 909-787-8380 · Official contact information
Website lists Monday–Friday 8 a.m.–5 p.m.; Saturday and Sunday closed.
Care offered
The site lists preventive medicine, vaccination, microchipping, ultrasound, in-house diagnostics, allergy/genetic/cancer testing, pharmacy, dental evaluation and end-of-life care.
After-hours navigation
Sunset currently refers after-hours emergencies to MarQueen Pet Emergency & Specialty, Emergency Pet Hospital of Glendora and East Valley Emergency Pet Clinic. Help My Pet is separately verifying East Valley’s current phone and hours because public sources disagree.
Practical next steps
Sunset says it tailors recommendations to different pet-parenting approaches and budgets. Help My Pet can supplement that with emergency/specialty navigation, end-of-life options, community and practical support, and cost-help routes when finances are the specific barrier.
Sources and corrections
Services · Contact and emergency referrals · California Veterinary Medical Board premises license record (independent check, October 20, 2026)
Work with this practice or notice a correction? See the current update options.