Emergency vets in Mission Viejo, CA
No clinic in our Mission Viejo data currently advertises dedicated emergency service — nearby emergency hospitals are listed below. Call first: ER availability and wait times change by the hour.
Red markers = emergency clinics. Click a marker for details.
Nearest emergency hospitals outside Mission Viejo
~6 miles away in Laguna Woods
~16 miles away in Costa Mesa
Veterinary Emergency Group
2800 Harbor Boulevard, Costa Mesa, CA 92626
Verified 2026-07-27
~18 miles away in Fountain Valley
VCA Animal Hospital
18300 Euclid Street, Fountain Valley, CA 92708
Verified 2026-07-27
~29 miles away in Temecula
Emergency Pet Clinic
27443 Jefferson Avenue, Temecula, CA 92590
Verified 2026-07-27
~31 miles away in Long Beach
Long Beach Animal Emergency
Long Beach, CA
Unverified listing — call ahead to confirm hours and availability.
~36 miles away in Grand Terrace
Not an emergency? See all 3 vet clinics in Mission Viejo →
General-practice vets often take same-day urgent appointments during business hours, and most can refer you to an after-hours ER.
If your pet is in crisis right now
- Call the closest 24/7 hospital above and tell them you're coming — they'll prep for arrival.
- Suspected poisoning: ASPCA Animal Poison Control (888) 426-4435 (24/7, consultation fee applies).
- Keep your pet warm, contained, and moving as little as possible during transport.
- Ask for a written estimate and triage priority when you arrive — both are standard requests.