Table 7.

Miscarriage-related ICD-9 codes.

ICD-9 code	ICD-9 diagnosis
631	Other abnormal product of conception
632	Missed abortion (early fetal death before 22 completed weeks of gestation), retained products of conception, not following spontaneous or induced abortion or delivery
634.9	Spontaneous abortion without mention of complications - unspecified stage
634.91	Spontaneous abortion without mention of complications - incomplete
634.92	Spontaneous abortion without mention of complications - complete
637	Unspecified abortion, retained products of conception following abortion
637.9	Abortion (complete, incomplete, inevitable with or without retained products of conception)
637.91	Unspecified abortion, without mention of complication - incomplete
637.92	Unspecified abortion, without mention of complication - complete
640	Threatened abortion
640.8	Other specified hemorrhage in early pregnancy
640.9	Unspecified hemorrhage in early pregnancy
641.93	Unspecified antepartum hemorrhage
646.83	Other specified complications of pregnancy
649.53	Spotting complicating pregnancy, antepartum condition or complication

ICD-9, International Classification of Disease, Ninth Revision