Table 1.

Coding Ranges for Disease Categories

Disease Category	ICD-9-CM Diagnosis Code Ranges	ICD-10-CM Diagnosis Code Ranges
Circulatory	390–459	I00–I99
Digestive	520–579	K00–K95
Genitourinary	580–629	N00–N99
Injury	800–909.2, 909.4, 909.9, 910–994.9, 995.5–995.59, and 995.80–995.85	All S codes, T07–T34, T51–T76, T79, and T36-T50 with a 6th character of 1, 2, 3, or 4 with the following exceptions: T36.9, T37.9, T39.9, T41.4, T42.7, T43.9, T45.9, T47.9, and T49.9 with a 5 th character of 1, 2, 3, or 4
Nervous system and sense organs	320–389	G00–G99 and H00–H95
Respiratory	460–519	J00–J99

Abbreviations: ICD-9-CM, International Classification of Diseases, Ninth Revision, Clinical Modification; ICD-10-CM, International Classification of Diseases, Tenth Revision, Clinical Modification/Procedure Coding System.