2007 ICD-9-CM Procedure 01.24 Other craniotomy (kray-nee-AH-toe-mee) An operation in which an opening is made in the skull. A small opening in the skull made with a surgical drill. Any operation on the cranium or incision into the cranium. (Dorland, 28th ed) The removal of a circular disk of the cranium. It is performed with a trephine, a small circular saw with a center pin mounted on a hollow metal shaft to which is attached a transverse handle. (Random House Unabridged Dictionary, 2d ed) 01.24 is a specific code that can be used to specify a procedure 01.24 contains 18 index entries View the full Volume 3 01.* hierarchy 01.24 also known as: Cranial: decompression exploration trephination Craniotomy NOS Craniotomy with removal of: epidural abscess extradural hematoma foreign body of skull 01.24 excludes: removal of foreign body with incision into brain (01.39) Index entries containing 01.24: Burr holes 01.24 Craniotomy 01.24 as operative approach -- omit code fetal 73.8 for decompression of fracture 02.02 reopening of site 01.23 Decompression brain 01.24 cranial 01.24 for skull fracture 02.02 intracranial 01.24 Drainage epidural space, cerebral (incision) (trephination) 01.24 by aspiration 01.09 extradural space, cerebral (incision) (trephination) 01.24 by aspiration 01.09 intracranial space (epidural) (extradural) (incision) (trephination) 01.24 by aspiration 01.09 subarachnoid or subdural (incision) (trephination) 01.31 by aspiration 01.09 Exploration -- see also Incision cranium 01.24 Incision (and drainage) bone 77.10 skull 01.24 cerebral (meninges) 01.39 epidural or extradural space 01.24 epidural space, cerebral 01.24 extradural space (cerebral) 01.24 intracranial (epidural space) (extradural space) 01.24 subarachnoid or subdural space 01.31 skull (bone) 01.24 Removal -- see also Excision foreign body NEC -- see also Incision, by site 98.20 brain 01.39 without incision into brain 01.24 skull 01.24 with incision into brain 01.39 Trephination, trephining cranium 01.24