Oth dis of bld/bld-form org/immun mechnsm comp preg, 2nd tri

This code signifies the presence of a pre-existing or new hematologic disorder (e.g., anemia, coagulopathy, thrombocytopenia, or immune-mediated blood disorders) that adversely affects a pregnant patient during her second trimester. It indicates that the blood or immune system condition is complicating the pregnancy, requiring monitoring or intervention.

Apply this code when documentation clearly states a blood or immune system disorder is present and is complicating the pregnancy, specifically between the 14th and 27th weeks of gestation. Examples include severe iron deficiency anemia requiring transfusion, immune thrombocytopenic purpura (ITP) exacerbation, or a newly diagnosed leukemia impacting the pregnancy during the second trimester.

• Always sequence this code as a secondary diagnosis, following the code for the specific obstetric condition or reason for encounter (e.g., Z3A.14 for 14 weeks gestation).
• Ensure the medical record explicitly links the blood/immune disorder to the pregnancy and specifies the second trimester.
• Do not use this code for conditions that are considered normal physiological changes of pregnancy (e.g., mild dilutional anemia) unless they become pathological and complicate the pregnancy.