What is the ICD-10-CM code for acute sinusitis?

The ICD-10-CM code for acute sinusitis is J01.90, which refers to unspecified acute sinusitis. If the sinusitis is specified as being acute and affecting a particular sinus, different codes may apply, such as J01.11 for acute maxillary sinusitis or J01.01 for acute frontal sinusitis. It's important to choose the code that accurately reflects the diagnosis.