Grand Animal Hospital

1114 S Diamond Bar Blvd, Diamond Bar, CA, 91765

Grand Animal Hospital is a full-service small-animal practice in Diamond Bar, California, open since 2023, seeing patients Sunday through Friday and accepting walk-ins and same-day appointments. It offers wellness and preventive care, diagnostics including digital X-ray, routine and orthopedic surgery, and urgent care during business hours, referring after-hours emergencies to MarQueen Veterinary ER & Specialty in Upland.

Call (909) 323-2860
Open until 6:00 PM today · closed Saturday
28 servicesDogs, Cats
EmergenciesUrgent and emergency care during business hours only. The site states: 'During regular business hours, Grand Animal Hospital provides emergency evaluation, stabilization, hospitalization, and urgent medical treatment for pets.' Outside those hours it refers clients to MarQueen Veterinary ER & Specialty, 1582 N Benson Ave, Upland CA 91786, (909) 303-1700. Urgent care visits carry a higher exam fee and are triaged on arrival rather than scheduled.
HoursOpen until 6:00 PM
Monday8:00 AM – 6:00 PM
Tuesday8:00 AM – 6:00 PM
Wednesday8:00 AM – 6:00 PM
Thursday8:00 AM – 6:00 PM
Friday8:00 AM – 6:00 PM
SaturdayClosed
Sunday8:00 AM – 6:00 PM
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Before you call

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What they do

28 services, one practice.

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Wellness ExamsVaccinationsParasite ControlAllergy And Dermatology CareDental CareMicrochippingNutrition CounselingPuppy And Kitten CareSenior Pet CareHospice Care And EuthanasiaBlood And Laboratory TestingElectrocardiogram (ECG)UltrasoundDigital Radiology (X-Ray)TonometryOphthalmologyOrthopedicsPain Management

What Grand Animal Hospital says

In their own words, from grandvets.com, read October 11, 2026.

  • Accepting new patientsNew Clients Welcome!
  • After hoursOutside our business hours, we recommend you contact the following emergency animal hospital(s) in the Diamond Bar, CA area.
  • Payment plans or financingWe accept all major credit and debit cards, cash, and checks, as well as CareCredit, Scratchpay, and All Pet Card.
  • Walk-ins welcomeWalk-Ins & Same-Day Appointments Available.
  • SurgeryPet Surgical Procedures
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On site

What’s in the building

01Digital radiography (X-ray)
Who they treat

2 species under this roof

DogsCats
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Compiled from public records and grandvets.com, August 30, 2026. Not affiliated with PawsRx unless claimed, and details change, so confirm anything that matters when you call. Request removal.

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