ICD-10-CM > O00-O9A > O60-O77 > O62 O62 Abnormalities of forces of labor Non-Billable/Non-Specific Codes O62.0Primary inadequate contractionsO62.1Secondary uterine inertiaO62.2Other uterine inertiaO62.3Precipitate laborO62.4Hypertonic, incoordinate, and prolonged uterine contractionsO62.8Other abnormalities of forces of laborO62.9Abnormality of forces of labor, unspecified