Table 1. Codes Used to Identify Tonsillectomy Procedures and Posttonsillectomy Hemorrhage Complications.

Code	Description
CPT-4 tonsillectomy procedure code
42820	Tonsillectomy and adenoidectomy; age <12 y
42821	Tonsillectomy and adenoidectomy; age ≥12 y
42825	Tonsillectomy, primary or secondary; age <12 y
42826	Tonsillectomy, primary or secondary; age ≥12 y
ICD-9 hemorrhage encounter code
998.11	Hemorrhage complicating a procedure
528.9	Other and unspecified diseases of the oral soft tissues
784.8	Hemorrhage from throat
ICD-10 code R041	Hemorrhage from throat
CPT-4 hemorrhage encounter code
42960	Control oropharyngeal hemorrhage, primary or secondary (eg, posttonsillectomy); simple
42961	Control oropharyngeal hemorrhage, primary or secondary (eg, posttonsillectomy); complicated requiring hospitalization
42962	Control oropharyngeal hemorrhage, primary or secondary (eg, posttonsillectomy); with secondary surgical intervention

Abbreviations: CPT-4, Current Procedural Terminology, 4th Edition; ICD-9, International Classification of Diseases, Ninth Revision; ICD-10, International Statistical Classification of Diseases and Related Health Problems, Tenth Revision.