The Body Part Skin, Scalp is identified by number "0" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 0H90
Drainage of Scalp Skin, External Approach
Drainage of Scalp Skin, External Approach, Diagnostic
Drainage of Scalp Skin with Drainage Device, Extern Approach