Tuberculosis of intrathoracic lymph nodes

This code signifies a diagnosis of tuberculosis affecting the lymph nodes located within the chest cavity, such as hilar, mediastinal, or tracheobronchial nodes. It represents an active infection of these specific lymphatic structures by Mycobacterium tuberculosis.

Apply this code when documentation explicitly states tuberculosis of intrathoracic lymph nodes, often confirmed by biopsy, culture, or imaging findings. This diagnosis typically arises from a workup for persistent cough, fever, weight loss, or abnormal chest imaging showing enlarged mediastinal or hilar lymph nodes.

• Do not use this code if the tuberculosis is explicitly documented as primary tuberculosis; refer to the Excludes1 note.
• Ensure documentation specifies "intrathoracic" or names specific intrathoracic lymph nodes (e.g., hilar, mediastinal) to support this code.
• Code any associated manifestations of tuberculosis, such as pleural effusion or pulmonary involvement, with additional codes.