ICD-10-PCS Billable Code

0K8S3ZZ

Division Lower Leg Muscle, Right to No Qualifier with No Device, Percutaneous Approach

Procedural Specifications

Clinical Axis Detail Definition
Section0 Medical and Surgical
Body SystemK Muscles
Operation8 Division
Body PartS Lower Leg Muscle, Right
Approach3 Percutaneous
DeviceZ No Device
QualifierZ No Qualifier

Operation Definition

Cutting into a body part, without draining fluids and/or gases from the body part, in order to separate or transect a body part

Procedure Overview

Division procedures on the muscles involve cutting into muscle tissue to separate or transect it, without draining any fluid or gas in the process. The classic example is a tenotomy-style release, where a tight or contracted muscle is cut across its fibers to relieve spasticity or correct a deformity, as seen in some clubfoot or cerebral palsy treatments.

The goal is mechanical: changing how the muscle functions by interrupting its continuity, not removing any part of it. Nothing is taken out of the body during a pure division procedure, and the cut ends are typically left to heal in a new, often lengthened, position.

These procedures are frequently used alongside orthopedic corrections for contractures, where releasing a shortened muscle allows a joint to move through a fuller range of motion.

Anatomy & Axis Detail

Lower Leg Muscle, Right

The right lower leg contains the tibialis anterior, gastrocnemius, soleus, and long toe flexor and extensor muscles running from below the knee to the ankle, producing dorsiflexion, plantarflexion, and toe motion through their distal tendons. Division here severs a muscle's fibers or musculotendinous junction without removing tissue, most often to release a fixed equinus deformity, correct spastic contracture following stroke or cerebral palsy, or surgically lengthen a shortened muscle-tendon unit as part of deformity correction. Because the leg below the knee is organized into tight anterior, lateral, and posterior compartments with major nerves and vessels running close to the muscle bellies, the surgeon must be precise about which muscle and compartment is entered to avoid neurovascular injury. Documentation should specify laterality and the exact muscle divided, distinguishing this cutting procedure from a tendon release coded separately.

Approach: Percutaneous

Percutaneous describes entry by needle or instrument puncture through the skin or mucous membrane to reach the site of the procedure, without cutting the tissue open or using a visualizing scope. It differs from Open in that the site itself is never exposed, and from Percutaneous Endoscopic in that no endoscope is used to see internal structures. Common examples include needle biopsies and injections.

Coding & Documentation

The note should describe cutting or transecting the muscle to separate it, with no mention of removing tissue or draining fluid, since either of those findings would point to a different root operation. The specific muscle and the reason for the release, such as contracture or spasticity, support the code selection.

A common mistake is coding Division when the surgeon actually excised a strip of muscle or fascia, which should be Excision instead. Coders also sometimes confuse a myotomy performed to drain an abscess, which is Drainage, with a myotomy performed purely to cut and separate the muscle.

Commonly Confused With

ReleaseRelease is the procedure most often confused with Division, and the distinguishing question is whether the objective was to free the muscle from surrounding constraining tissue, which is Release, versus cutting across the muscle itself to separate it, which is Division.
DrainageDrainage looks similar procedurally when an incision is made into muscle, but Drainage is defined by taking fluid or gas out, so any myotomy done to evacuate an abscess or hematoma falls there instead of under Division.