Diseases of the circ sys comp pregnancy, third trimester

This code signifies the presence of a pre-existing or newly developed circulatory system disorder that is adversely affecting a pregnant patient in her third trimester. This includes conditions such as hypertension, heart disease, or venous complications that are exacerbated or arise during the final stage of pregnancy.

Apply this code when a pregnant patient in her third trimester (28 weeks gestation to delivery) is diagnosed with a circulatory system disease that is complicating the pregnancy. Documentation should clearly state the specific circulatory condition and confirm the third-trimester status of the pregnancy.

• Always sequence this code as a secondary diagnosis, following the code for the specific circulatory condition.
• Ensure the medical record explicitly states "third trimester" or provides gestational age indicating the third trimester.
• Do not use this code for circulatory conditions that are incidental to pregnancy and not complicating it.