| 00N00ZZ | Release Brain, Open Approach |
| 00N03ZZ | Release Brain, Percutaneous Approach |
| 00N04ZZ | Release Brain, Percutaneous Endoscopic Approach |
| 00N10ZZ | Release Cerebral Meninges, Open Approach |
| 00N13ZZ | Release Cerebral Meninges, Percutaneous Approach |
| 00N14ZZ | Release Cerebral Meninges, Percutaneous Endoscopic Approach |
| 00N20ZZ | Release Dura Mater, Open Approach |
| 00N23ZZ | Release Dura Mater, Percutaneous Approach |
| 00N24ZZ | Release Dura Mater, Percutaneous Endoscopic Approach |
| 00N60ZZ | Release Cerebral Ventricle, Open Approach |
| 00N63ZZ | Release Cerebral Ventricle, Percutaneous Approach |
| 00N64ZZ | Release Cerebral Ventricle, Percutaneous Endoscopic Approach |
| 00N70ZZ | Release Cerebral Hemisphere, Open Approach |
| 00N73ZZ | Release Cerebral Hemisphere, Percutaneous Approach |
| 00N74ZZ | Release Cerebral Hemisphere, Percutaneous Endoscopic Approach |
| 00N80ZZ | Release Basal Ganglia, Open Approach |
| 00N83ZZ | Release Basal Ganglia, Percutaneous Approach |
| 00N84ZZ | Release Basal Ganglia, Percutaneous Endoscopic Approach |
| 00N90ZZ | Release Thalamus, Open Approach |
| 00N93ZZ | Release Thalamus, Percutaneous Approach |
| 00N94ZZ | Release Thalamus, Percutaneous Endoscopic Approach |
| 00NA0ZZ | Release Hypothalamus, Open Approach |
| 00NA3ZZ | Release Hypothalamus, Percutaneous Approach |
| 00NA4ZZ | Release Hypothalamus, Percutaneous Endoscopic Approach |
| 00NB0ZZ | Release Pons, Open Approach |
| 00NB3ZZ | Release Pons, Percutaneous Approach |
| 00NB4ZZ | Release Pons, Percutaneous Endoscopic Approach |
| 00NC0ZZ | Release Cerebellum, Open Approach |
| 00NC3ZZ | Release Cerebellum, Percutaneous Approach |
| 00NC4ZZ | Release Cerebellum, Percutaneous Endoscopic Approach |
| 00ND0ZZ | Release Medulla Oblongata, Open Approach |
| 00ND3ZZ | Release Medulla Oblongata, Percutaneous Approach |
| 00ND4ZZ | Release Medulla Oblongata, Percutaneous Endoscopic Approach |
| 00NF0ZZ | Release Olfactory Nerve, Open Approach |
| 00NF3ZZ | Release Olfactory Nerve, Percutaneous Approach |
| 00NF4ZZ | Release Olfactory Nerve, Percutaneous Endoscopic Approach |
| 00NG0ZZ | Release Optic Nerve, Open Approach |
| 00NG3ZZ | Release Optic Nerve, Percutaneous Approach |
| 00NG4ZZ | Release Optic Nerve, Percutaneous Endoscopic Approach |
| 00NH0ZZ | Release Oculomotor Nerve, Open Approach |
| 00NH3ZZ | Release Oculomotor Nerve, Percutaneous Approach |
| 00NH4ZZ | Release Oculomotor Nerve, Percutaneous Endoscopic Approach |
| 00NJ0ZZ | Release Trochlear Nerve, Open Approach |
| 00NJ3ZZ | Release Trochlear Nerve, Percutaneous Approach |
| 00NJ4ZZ | Release Trochlear Nerve, Percutaneous Endoscopic Approach |
| 00NK0ZZ | Release Trigeminal Nerve, Open Approach |
| 00NK3ZZ | Release Trigeminal Nerve, Percutaneous Approach |
| 00NK4ZZ | Release Trigeminal Nerve, Percutaneous Endoscopic Approach |
| 00NL0ZZ | Release Abducens Nerve, Open Approach |
| 00NL3ZZ | Release Abducens Nerve, Percutaneous Approach |
| 00NL4ZZ | Release Abducens Nerve, Percutaneous Endoscopic Approach |
| 00NM0ZZ | Release Facial Nerve, Open Approach |
| 00NM3ZZ | Release Facial Nerve, Percutaneous Approach |
| 00NM4ZZ | Release Facial Nerve, Percutaneous Endoscopic Approach |
| 00NN0ZZ | Release Acoustic Nerve, Open Approach |
| 00NN3ZZ | Release Acoustic Nerve, Percutaneous Approach |
| 00NN4ZZ | Release Acoustic Nerve, Percutaneous Endoscopic Approach |
| 00NP0ZZ | Release Glossopharyngeal Nerve, Open Approach |
| 00NP3ZZ | Release Glossopharyngeal Nerve, Percutaneous Approach |
| 00NP4ZZ | Release Glossopharyngeal Nerve, Percutaneous Endoscopic Approach |
| 00NQ0ZZ | Release Vagus Nerve, Open Approach |
| 00NQ3ZZ | Release Vagus Nerve, Percutaneous Approach |
| 00NQ4ZZ | Release Vagus Nerve, Percutaneous Endoscopic Approach |
| 00NR0ZZ | Release Accessory Nerve, Open Approach |
| 00NR3ZZ | Release Accessory Nerve, Percutaneous Approach |
| 00NR4ZZ | Release Accessory Nerve, Percutaneous Endoscopic Approach |
| 00NS0ZZ | Release Hypoglossal Nerve, Open Approach |
| 00NS3ZZ | Release Hypoglossal Nerve, Percutaneous Approach |
| 00NS4ZZ | Release Hypoglossal Nerve, Percutaneous Endoscopic Approach |
| 00NT0ZZ | Release Spinal Meninges, Open Approach |
| 00NT3ZZ | Release Spinal Meninges, Percutaneous Approach |
| 00NT4ZZ | Release Spinal Meninges, Percutaneous Endoscopic Approach |
| 00NW0ZZ | Release Cervical Spinal Cord, Open Approach |
| 00NW3ZZ | Release Cervical Spinal Cord, Percutaneous Approach |
| 00NW4ZZ | Release Cervical Spinal Cord, Percutaneous Endoscopic Approach |
| 00NX0ZZ | Release Thoracic Spinal Cord, Open Approach |
| 00NX3ZZ | Release Thoracic Spinal Cord, Percutaneous Approach |
| 00NX4ZZ | Release Thoracic Spinal Cord, Percutaneous Endoscopic Approach |
| 00NY0ZZ | Release Lumbar Spinal Cord, Open Approach |
| 00NY3ZZ | Release Lumbar Spinal Cord, Percutaneous Approach |
| 00NY4ZZ | Release Lumbar Spinal Cord, Percutaneous Endoscopic Approach |
