ICD-10 Code B45.0 – Pulmonary cryptococcosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B45.0 – Pulmonary cryptococcosis
What it is
B45.0 identifies cryptococcal infection limited to the lungs. It is used when Cryptococcus causes pulmonary disease rather than meningitis or another site.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include cough, chest pain, shortness of breath, fever, or imaging evidence of pulmonary infection.
When to use this code
Use B45.0 when the provider documents pulmonary cryptococcosis, cryptococcal pneumonia, or lung involvement from Cryptococcus. Apply it when the diagnosis is confirmed or clearly stated in the record. If infection is described at another site, code the documented location instead.
Do not use for
Do not use this code for cryptococcal meningitis, disseminated cryptococcosis, or unspecified cryptococcosis. Check documentation if the site of infection is unclear.
Coding tip
Verify that the record supports pulmonary involvement specifically, because cryptococcal disease at another site requires a different code.