An implantable medical device for providing phototherapy to a patient's brain is disclosed. The device includes a housing containing a light source for providing phototherapy to a patient. A light path is attached to the housing. The implantable medical device is configured to be positioned between a patient's skull and scalp with the light path extending into the patient's brain, such that light from the light source can irradiate a target position within the patient's brain. The implantable medical device is powered and controlled by an implantable pulse generator (IPG) that may be implanted into a patient's tissue remotely from the device and connected to the device by wire leads.
