ICD-10-PCS Billable Code

0Q9440Z

Drainage Acetabulum, Right to No Qualifier with Drainage Device, Percutaneous Endoscopic Approach

Procedural Specifications

Clinical Axis Detail Definition
Section0 Medical and Surgical
Body SystemQ Lower Bones
Operation9 Drainage
Body Part4 Acetabulum, Right
Approach4 Percutaneous Endoscopic
Device0 Drainage Device
QualifierZ No Qualifier

Operation Definition

Taking or letting out fluids and/or gases from a body part

Procedure Overview

Drainage procedures on the lower bones remove fluid or gas that has built up within or around a bone, most often pus from an infection such as osteomyelitis or a subperiosteal abscess. A surgeon opens a channel into the affected area of the pelvis, femur, tibia, or another lower bone and lets the collection escape, sometimes leaving a drain in place to allow continued outflow.

This family of procedures is used when infection, blood, or another fluid collection is causing pain, swelling, or systemic illness and needs to be evacuated to relieve pressure and allow antibiotics or the body's own defenses to bring the infection under control.

Anatomy & Axis Detail

Acetabulum, Right

The right acetabulum is the cup-shaped socket within the pelvic bone that articulates with the femoral head to form the hip joint, bearing substantial mechanical load with every step. Drainage of this site typically addresses periprosthetic joint infection following total hip arthroplasty, septic arthritis extending into subchondral bone, or an osteomyelitis-related collection within the acetabular walls or columns. Because the acetabulum sits deep within the pelvis and is closely related to the hip joint capsule, drainage often overlaps conceptually with joint-directed procedures, though when the collection is confined to bone rather than the joint space itself, it is coded as bone drainage. The proximity to the sciatic nerve and pelvic vasculature requires careful surgical approach planning.

Approach: Percutaneous Endoscopic

Percutaneous Endoscopic combines a puncture through skin or mucous membrane with insertion of an endoscope to visualize the procedure internally, as in laparoscopic cholecystectomy. It is distinguished from plain Percutaneous by the presence of scope-guided visualization, and from Via Natural or Artificial Opening Endoscopic by its route being a new puncture rather than an existing orifice or stoma.

Device: Drainage Device

Drainage Device denotes a device such as a tube or catheter left in place to remove fluid, blood, or air from a body part or cavity following a procedure. It is distinguished from Monitoring Device, which senses and records physiologic data rather than evacuating substances from the body.

Coding & Documentation

The documentation should describe fluid or gas being let out of the bone and specify whether a drainage device, such as a catheter or drain, was left behind, since that determines whether a qualifier for drainage device applies. The exact bone and the depth of approach (percutaneous versus open) should be clearly stated to select the right approach value.

A common error is coding Drainage when the procedure actually removed necrotic bone tissue along with the fluid - if dead or infected bone was debrided and taken out, that portion of the case is better captured under Excision, and both root operations may need to be coded if both were performed. Coders should also avoid defaulting to Drainage for procedures where the bone itself was cut without any fluid evacuation.

Commonly Confused With

ExcisionExcision (0QB) is commonly performed alongside Drainage in infected bone, and the two are distinguished by whether tissue was cut out and removed (Excision) versus fluid being let out (Drainage) - both codes may apply to the same operative episode.
DivisionDivision is different because it separates bone tissue without removing any fluid.
ExtirpationExtirpation is sometimes confused with Drainage when a solid matter, like a sequestrum or clot, is taken out rather than a liquid or gas, which would make Extirpation the correct root operation instead.