461 Acute sinusitis 
461.0 Acute maxillary sinusitis convert 461.0 to ICD-10-CM 461.1 Acute frontal sinusitis convert 461.1 to ICD-10-CM 461.2 Acute ethmoidal sinusitis convert 461.2 to ICD-10-CM 461.3 Acute sphenoidal sinusitis convert 461.3 to ICD-10-CM 461.8 Other acute sinusitis convert 461.8 to ICD-10-CM
461.9 Acute sinusitis unspecified convert 461.9 to ICD-10-CM