ICD-10-PCS Billable Code

0L9K0ZZ

Drainage Hip Tendon, Left to No Qualifier with No Device, Open Approach

Procedural Specifications

Clinical Axis Detail Definition
Section0 Medical and Surgical
Body SystemL Tendons
Operation9 Drainage
Body PartK Hip Tendon, Left
Approach0 Open
DeviceZ No Device
QualifierZ No Qualifier

Operation Definition

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

Procedure Overview

Tendon drainage procedures remove fluid, such as pus, blood, or inflammatory exudate, that has accumulated around or within a tendon sheath. This is most commonly performed for infectious tenosynovitis, where bacteria have infiltrated the sheath surrounding a tendon and formed a collection that needs to be evacuated to control infection and relieve pressure, or for a hematoma following trauma or surgery that is causing pain or restricting movement.

The procedure can range from a simple needle aspiration to an open incision and irrigation of the tendon sheath when infection is extensive, sometimes with a drain left in place to allow continued fluid egress. Prompt drainage of an infected tendon sheath is important because untreated infection can damage the tendon's gliding mechanism and lead to lasting stiffness or loss of function.

Anatomy & Axis Detail

Hip Tendon, Left

The left hip tendons, including the iliopsoas and gluteal tendon groups, cross the hip joint to control thigh movement and pelvic stability, and their close relationship to the joint capsule and iliopsoas bursa makes them a site where infected fluid can accumulate secondary to septic bursitis, postsurgical infection, or hematoma from trauma or anticoagulation. Evacuating such a collection typically requires image-guided percutaneous aspiration when the fluid is accessible and non-loculated, reserving open drainage for deeper or multiloculated abscesses that risk extending toward the joint itself. Given the tendons' depth beneath the gluteal musculature and their proximity to the sciatic nerve, careful trajectory planning is part of routine practice. Accurate coding depends on confirming the fluid originated from the tendon or its sheath rather than the adjacent joint or bursa, and on correct laterality.

Approach: Open

Open approach means the surgeon cuts through skin, mucous membrane, or other tissue layers to physically expose the target site to view before performing the procedure. It gives direct visualization and hands-on access, distinguishing it from Percutaneous approaches where instruments pass through a small puncture without exposing the site. Open is typical for procedures needing wide access, such as most laparotomies.

Coding & Documentation

Coders assign a Drainage code when the documentation confirms fluid or gas was taken or let out of the tendon or its sheath, whether by needle aspiration, incision and evacuation, or placement of a drain. The note should identify the tendon or sheath involved and describe the material removed, such as purulent fluid or hematoma, to support medical necessity.

A frequent error is coding Drainage when the procedure actually involved debridement of infected or necrotic tendon tissue alongside fluid removal, which shifts part of the case to Excision or Extirpation depending on what was physically taken out. Another pitfall is failing to capture a drainage device left in place, since the qualifier for a drainage device changes the code and is easy to overlook if the operative note only describes the initial evacuation.

Commonly Confused With

ExtirpationExtirpation is easily confused with Drainage when the collection includes thick pus or debris rather than free-flowing fluid, since Extirpation applies to removing solid matter rather than draining fluid or gas.
IrrigationIrrigation alone, without removal of fluid, does not qualify as Drainage and should not be coded as such.
ExcisionExcision is a separate consideration when the surgeon also removes damaged tendon tissue during the same operative session for infection control, which is common in severe tenosynovitis and requires coding both procedures if documentation supports each distinct action.