M23.4
Header — not billable
Loose body in knee
Loose body in knee
M23.4 is a header (parent) code in the ICD-10-CM hierarchy. It is not billable for claim submission. Use one of the billable child codes listed below.
Billable codes in this category
Each of the codes below is billable. Choose the one that most accurately describes the patient's diagnosis.
M23.40
Loose body in knee, unspecified knee
M23.41 M23.40 identifies a loose body within the knee joint when the operative or affected side is not documented or cannot be determined.
Loose body in knee, right knee
M23.42 M23.41 identifies an intra-articular loose body — a free fragment of bone, cartilage, or both — specifically within the right knee joint.
Loose body in knee, left knee
M23.42 identifies a loose body — a detached fragment of bone, cartilage, or other intra-articular material — present within the left knee joint.