California Neurosurgical Institute (CNI) is a neurosurgical practice providing personalized neurological care and surgical options in Valencia and Encino, California. Its team treats conditions affecting the brain, spine, and peripheral nerves, with an emphasis on clear communication, second opinions, and durable, long-term relief. The practice combines patient-focused care with advanced technologies and both minimally invasive and open surgical techniques.

Services include consultations and second opinions, brain tumor treatment, skull-base and pituitary surgery, procedures for trigeminal neuralgia and hemifacial spasm, hydrocephalus shunting, and deep brain stimulation. Spine and nerve services include artificial disc replacement, minimally invasive decompression and spinal fusion, corrective surgery for spinal deformity, revision surgery for failed fusions, spinal cord stimulation, spinal tumor removal, and carpal tunnel and ulnar nerve release. CNI also evaluates and treats back and neck pain, sciatica, herniated discs, spinal stenosis, traumatic brain injuries, concussion, and peripheral nerve pain. Founded by neurosurgeon Dr. Mark Liker, the institute includes specialists with expertise in complex brain and spine disorders.