Hypertrophic pulmonary osteoarthropathy

This code describes hypertrophic pulmonary osteoarthropathy (HPOA), a paraneoplastic syndrome characterized by periostitis, clubbing of the digits, and arthralgia, typically associated with underlying intrathoracic malignancies such as lung cancer. It results from abnormal bone and joint tissue proliferation, often secondary to chronic hypoxemia or other systemic effects of the primary disease.

Use this code when documentation clearly indicates a diagnosis of hypertrophic pulmonary osteoarthropathy, often in conjunction with a primary diagnosis of lung carcinoma or other pulmonary malignancy. Supporting documentation should detail findings such as digital clubbing, periosteal new bone formation on imaging, and joint pain, linking these to an underlying pulmonary condition.

• Always code the underlying pulmonary condition, especially malignancy, as the primary diagnosis when HPOA is a manifestation.
• Distinguish from primary hypertrophic osteoarthropathy (pachydermoperiostosis), which is a genetic disorder and not secondary to pulmonary disease.
• Ensure imaging reports (e.g., X-rays, bone scans) confirm periostitis to support the diagnosis.