The CPT code is still unlisted as of 2009, the unlisted code used should be 55899. When submitting a claim with this code you will need to make sure to include documentation and the procedure description.
There is no strict code for chronic aspiration. Coders generally use 933.1, the code for aspiration due to phlegm, foreign body or food, asphyxia, or strangulation.
Chronic aspiration risk
507.0
12098
12098
12098
10021
51101
10160
55000
38221
Fine needle aspiration; with imaging guidance