Suggest an Edit Name* Categories* Doctor Hospital Pharmacy Add category State* Locality* ZIP* Street address* Phone* Website Opening hours Monday: 09:00 am — 05:00 pm Tuesday: 09:00 am — 05:00 pm Wednesday: 09:00 am — 05:00 pm Thursday: 09:00 am — 05:00 pm Friday: 09:00 am — 05:00 pm Saturday: 09:00 am — 03:00 pm Company description Dr. Gregory Roy Lum located in the city of Hayward, state California. The legal address of the Doctor 800 W Winton Ave. Directions to the Doctor Dr. Gregory Roy Lum can be found on our interactive map. Ask your questions by calling 5107822466 on workdays.</br></br></br>NPI number: Data not provided</br>Provider's gender: Data not provided</br>Practice names: Data not provided</br>Board certifications: Data not provided Your comments (not for publishing) * — Required information Dr. Gregory Roy Lum - Hayward ← View details 800 W Winton Ave, California, Hayward, 94545, Hayward, California 94545 5107822466