ICD-10-CM > N00-N99 > N40-N53 > N46 > N46.1 > N46.12 N46.12 Oligospermia due to extratesticular causes Non-Billable/Non-Specific Code Also associated cause Codes N46.121Oligospermia due to drug therapyN46.122Oligospermia due to infectionN46.123Oligospermia due to obstruction of efferent ductsN46.124Oligospermia due to radiationN46.125Oligospermia due to systemic diseaseN46.129Oligospermia due to other extratesticular causes