Start getting used to looking in the 'J' diagnosis section of your manual. Don't fear: When ICD-9 becomes ICD-10 in 2013, you may sometimes have a simple one-to-one relationship between old and new ones, meaning that only the coder needs to tweak the way he or she report it. Check out these common sinusitis diagnoses, and discover what you'll report after October 1, 2013. Right now: For both acute and chronic conditions, you'll choose the fourth digit code based on where the sinusitis occurs. For example, for ethmoidal chronic sinusitis, you should report (473.2, Chronic sinusitis; ethmoidal). Your otolaryngologist will most likely prescribe a decongestant, pain reliever or antibiotics to treat sinusitis. ICD-10 difference: For chronic sinusitis diagnoses, you'll look to the J32.- codes. For instance, in the example above, 473.2 maps direction to J32.2 (Chronic ethmoidal sinusitis). Again, this is a direct one-to-one ratio with identical definitions. Like ICD-9, the fourth digit changes to specify location. Physician documentation: Coder tips: