The Body Part Thumb, Left is identified by letter "M" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to 0XQM
Repair Left Thumb, Percutaneous Approach
Repair Left Thumb, Open Approach
Repair Left Thumb, External Approach
Repair Left Thumb, Percutaneous Endoscopic Approach