Where is our lady of the lake regional medical center located? Our Lady of the Lake Regional Medical Center is located at 5000 Hennessy Boulevard, Baton Rouge, LA. Find directions at US News. What do patients say about Our Lady of the Lake Regional Medical Center?What is the phone number for our lady of the lake? Below is a list of the most commonly used phone numbers at Our Lady of the Lake. If you are searching for a specific department and it's not listed here, please call our main number at (225) 765-6565 for assistance. To reach a patient room dial 374-plus the patient's four-digit room number.Does our lady of the lake childrens hospital provide medical advice? Information presented through the Our Lady of the Lake Children's Hospital website is intended for general information only. We do NOT provide medical advice through our website. You should NOT rely upon the Our Lady of the Lake Children's Hospital website if emergency health care treatment or services may be needed.Why choose our lady of the lake? With an 800-bed Regional Medical Center, a dedicated Children’s Hospital, a 78-bed hospital in Gonzales, Louisiana, two freestanding emergency rooms, and a 500+ provider Physician Group, Our Lady of the Lake provides comprehensive healthcare services for common to complex conditions.