Diseases of the circ sys comp pregnancy, first trimester

This code signifies the presence of a pre-existing or new circulatory system disorder that complicates a pregnancy during its first trimester. This includes conditions such as hypertension, heart disease, or venous thromboembolism, which can significantly impact maternal and fetal health. The circulatory issue is considered a direct complication of the gravid state.

Apply this code when a pregnant patient in her first trimester is diagnosed with a circulatory system disease that is affecting or being affected by the pregnancy. Documentation should clearly state the specific circulatory condition and its impact or presence during the first trimester of gestation. This code is used in conjunction with a code for the specific circulatory condition.

• Always sequence the code for the specific circulatory condition (e.g., I10 for essential hypertension) before this code.
• Ensure documentation specifies "first trimester" for accurate trimester assignment.
• Do not use this code for circulatory conditions that are incidental to pregnancy and not complicating it.