Orthopedic Coding Alert

Orthopedic Coding:

Pinpoint the Correct Codes for Pediatric Orthopedic Cases

Find out how to code limb length discrepancies.

Pediatric orthopedic surgeons represent a small segment of the orthopedic surgery community, with only about 10 percent of orthopedic residents choosing pediatric fellowships annually. Because this orthopedic subspeciality population is so small, many coders have little or no exposure to coding the services of pediatric orthopedic surgeons.

Read on to learn about pediatric orthopedic conditions and how to code them.

What Conditions Do Pediatric Orthopedic Surgeons Treat?

Pediatric orthopedic surgeons treat a wide variety of musculoskeletal issues ranging from acute injuries to congenital (present at birth) deformities. Because children’s bones are still developing, these specialists focus on managing conditions that affect growth plates and long-term skeletal health. 

Commonly treated conditions, which are discussed later, include:

  • Fractures
  • Sports injuries
  • Overuse injuries
  • Scoliosis and kyphosis
  • Spondylolysis/spondylolisthesis

Other conditions are as follows:

  • Osteomyelitis: Serious bacterial infections of the bone
  • Septic arthritis: Infection within a joint, often causing a limp in children 
  • Benign tumors: Bone cysts and osteochondroma, occasionally causing a pathologic fracture
  • Malignant tumors: Bone tumors such as osteosarcoma and synovial sarcoma
  • Clubfoot: A birth defect where the feet are turned inward and under
  • Hip dysplasia: Developmental dysplasia of the hip (DDH) occurs when the hip socket does not fully cover the ball portion of the upper thigh bone
  • Gait abnormalities: These include issues such as in-toeing (pigeon toes), out-toeing, and limping

Let’s take a look at how to code common conditions that pediatric orthopedic surgeons treat.

Fix Your Fracture Treatment Coding Knowledge

Fracture repair is the most frequent surgical procedure performed by pediatric orthopedic surgeons. Children are particularly prone to growth plate fractures, often referred to as Salter-Harris fractures.

A Salter-Harris II fracture of the left distal radius (S59.222A [Salter-Harris Type II physeal fracture of lower end of radius, left arm, initial encounter for closed fracture]) may be treated with or without surgery depending on the stability of the fracture. A stable fracture may be treated with casting, while a displaced fracture may require one of the following treatments:

  • Closed manipulation and casting: Assign 25605 (Closed treatment of distal radial fracture (eg, Colles or Smith type) or epiphyseal separation, includes closed treatment of fracture of ulnar styloid, when performed; with manipulation)
  • Percutaneous fixation: Use 25606 (Percutaneous skeletal fixation of distal radial fracture or epiphyseal separation)
  • Open treatment: Report 25607 (Open treatment of distal radial extra-articular fracture or epiphyseal separation, with internal fixation)

A Tillaux ankle fracture, also known as a Salter-Harris III fracture, is unique to adolescents and involves the articular surface of the tibia. Look to codes 27824-27825 (Closed treatment of fracture of weight bearing articular portion of distal tibia (eg, pilon or tibial plafond), with or without anesthesia …) for closed treatments and 27826-27828 (Open treatment of fracture of weight bearing articular surface/portion of distal tibia (eg, pilon or tibial plafond), with internal fixation, when performed …) for open treatments of these fractures.

Recognize How to Code Sports and Overuse Injuries

Pediatric orthopedic surgeons treat several types of sports injuries, such as anterior cruciate ligament (ACL) tears, meniscus injuries, and shoulder dislocations. Surgeons will often repair meniscal tears in younger patients. A peripheral tear of the right lateral meniscus may be repaired arthroscopically. For that scenario, assign S83.261A (Peripheral tear of lateral meniscus, current injury, right knee, initial encounter) to report the diagnosis and use 29882 (Arthroscopy, knee, surgical; with meniscus repair (medial OR lateral)) appended with modifier RT (Right side) to report the arthroscopic repair.

Orthopedic surgeons also treat a number of overuse injuries in their pediatric patients. Conditions like Osgood-Schlatter disease or juvenile osteochondrosis of the tibial tubercle and calcaneal apophysitis are frequent in active adolescents, but the conditions rarely require surgical intervention.

Code Spinal Conditions and Treatments

Two conditions that a pediatric orthopedic surgeon might deal with are scoliosis and kyphosis. Abnormal curvatures of the spine like these are a primary reason for long-term monitoring.

Definition: Scoliosis is a sideways curve of the spine, whereas kyphosis is a forward curve of the spine.

Treatment for these conditions may include bracing and surgery. When surgical intervention is required, the treatment depends on the type of condition.

Flexible curves require fusion, fusion with instrumentation, or vertebral tethering, which are reported with the following codes:

  • Fusion: 22800-22804 (Arthrodesis, posterior, for spinal deformity, with or without cast …) or 22808-22812 (Arthrodesis, anterior …)
  • Instrumentation: +22840 (Posterior non-segmental instrumentation …) through +22847 (Anterior instrumentation …)
  • Vertebral tethering: 22836 (Anterior thoracic vertebral body tethering, including thoracoscopy, when performed …) through 22838 (Revision (eg, augmentation, division of tether), replacement, or removal of thoracic vertebral body tethering, including thoracoscopy, when performed), as well as 0656T-0657T (Anterior lumbar or thoracolumbar vertebral body tethering …), and 0790T (Revision (eg, augmentation, division of tether), replacement, or removal of thoracolumbar or lumbar vertebral body tethering, including thoracoscopy, when performed)

Rigid curves or congenital vertebral anomalies can require osteotomy, fusion, or fusion with instrumentation, which are reported with the following codes:

  • Osteotomy: 22206 through +22226 (Osteotomy of spine …)
  • Fusion: 22590 through +22632 (Arthrodesis …)
  • Instrumentation: +22840 through +22847

Spondylolysis/spondylolisthesis: Stress fractures in the lower back can cause vertebrae to slip. These conditions are most often treated with rest, activity modification, physical therapy, medications, and sometimes bracing. A severe vertebral slip may require surgery.

Limb length discrepancy: Congenital lower limb length discrepancies are reported with the following code categories:

  • Q72.4- (Longitudinal reduction defect of femur)
  • Q72.5- (Longitudinal reduction defect of tibia)
  • Q72.6- (Longitudinal reduction defect of fibula)

Report acquired lower limb length discrepancies with a code assigned to the shorter limb. Assign M21.762 (Unequal limb length (acquired), left tibia) for a patient with an acquired leg length discrepancy where the left tibia is shorter than the right. Patients may require complex surgical procedures to correct limb length discrepancies.

Pediatric leg shortening and lengthening surgeries correct significant leg length discrepancies by gradually separating a surgically cut bone, allowing the body to form new bone in the gap using external frames or internal rods over several months.

Surgical correction techniques include:

  • Arrest: 27475-27479 (Arrest, epiphyseal, any method (eg, epiphysiodesis) …) and 27485 (Arrest, hemiepiphyseal, distal femur or proximal tibia or fibula (eg, genu varus or valgus))
  • Osteoplasty: 27465-27466 (Osteoplasty, femur …) and 27715 (Osteoplasty, tibia and fibula, lengthening or shortening)
  • Osteotomy: 27448-27450 (Osteotomy, femur, shaft or supracondylar …), 27454 (Osteotomy, multiple, with realignment on intramedullary rod, femoral shaft (eg, Sofield type procedure)), and 27705-27709 (Osteotomy …)

The provider may use external fixation (20690-20697) or internal fixation with a rod to stabilize the limb during healing.

A newer internal fixation technique uses motorized rods, referred to as growing rods, inserted inside the bone. The rods are periodically adjusted magnetically or via remote control as the limb lengthens. 

2026 CPT® updates: The 2026 CPT® code set includes two new codes representing procedures performed to treat limb length discrepancies using a technique called distraction osteogenesis:

  • 27458 (Osteotomy(ies), femur, unilateral, with insertion of an externally controlled intramedullary lengthening device, including iliotibial band release when performed, imaging, alignment assessments, computations of adjustment schedules, and management of the intramedullary lengthening device)
  • 27713 (Osteotomy(ies), tibia, including fibula when performed, unilateral, with insertion of an externally controlled intramedullary lengthening device, including imaging, alignment assessments, computations of adjustment schedules, and management of the intramedullary lengthening device).

Heidi Stout, CPC, COSC, President, Coder on Call, Inc.