2007 ICD-9-CM Procedure 21.91 Lysis of adhesions of nose 21.91 is a specific code that can be used to specify a procedure 21.91 contains 2 index entries View the full Volume 3 21.* hierarchy 21.91 also known as: Posterior nasal scrub Index entries containing 21.91: Lysis adhesions nose, nasal 21.91 Scrub, posterior nasal (adhesions) 21.91