Michael T. O'Brien, MD 510-581-7677
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O'BRIEN URGENT CARE

beat the long waits, expense and clinical environment of the emergency room

This service is made available to the public, patients without a doctor, out of town visitors, or a temporary fill in if your doctor is unavailable
​cash only, not covered by insurance



(510)914-0854

Walk-in only, no appointments

Hours of operation are:
monday, tuesday, thursday, friday 9 am to 5 pm. Subject to change, please call and check the current voice message.
Sorry, closed weekends and holidays


The phone is answered during business hours only, no voice mail messages please. If I can't answer feel free to try again.

located at 20100 Lake Chabot Rd. Castro Valley, CA 94546


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