| ICD-9 | International Classification of Disease, 9th Revision |
|---|---|
| ICD9CM | International Classification of Diseases 9th Revision Clinical Modification |
| ICD-9 CM | International Classification of Diseases, Ninth Revision, Clinical Modification |
| ICD-9 | International Classification of Disease, ninth revision |
| AAO-HNS | American Academy of Otolaryngology Head and Neck Surgery |