O99.4Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium

O99.4 is the ICD-10-CM diagnosis code for diseases of the circulatory system complicating pregnancy, childbirth and the puerperium. It belongs to category O99 (other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium), block O94-O9A (other obstetric conditions, not elsewhere classified) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within O99 (other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium), O99.4 is specifically for diseases of the circulatory system complicating pregnancy, childbirth and the puerperium. Related codes cover anemia complicating pregnancy, childbirth and the puerperium (O99.0), other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium (O99.1), endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium (O99.2), mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium (O99.3), diseases of the respiratory system complicating pregnancy, childbirth and the puerperium (O99.5), diseases of the digestive system complicating pregnancy, childbirth and the puerperium (O99.6), diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperium (O99.7) and other specified diseases and conditions complicating pregnancy, childbirth and the puerperium (O99.8).

To report this condition, pick the subcode that matches the documentation: O99.41 (pregnancy), O99.42 (childbirth) and O99.43 (puerperium).

Don't report O99.4 together with the conditions in its Excludes1 note: peripartum cardiomyopathy (O90.3).

The conditions in its Excludes2 note aren't part of O99.4, but may be coded alongside it if the patient has both: hypertensive disorders (O10-O16), obstetric embolism (O88.-), venous complications and cerebrovenous sinus thrombosis in labor, childbirth and the puerperium (O87.-) and venous complications and cerebrovenous sinus thrombosis in pregnancy (O22.-).

Use an additional code to identify specific condition.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.