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

This code signifies a pregnant patient experiencing a blood disorder, a condition affecting blood-forming organs, or an immune system disorder that is complicating the pregnancy. This diagnosis applies when the specific trimester of pregnancy is not documented. It indicates that the primary condition is not directly obstetric but is impacting the pregnancy.

Use this code when a pregnant patient has a pre-existing or newly diagnosed hematologic or immune disorder (e.g., anemia not specified as obstetric, thrombocytopenia, autoimmune disease) that is noted by the provider as complicating the pregnancy. Documentation should clearly link the blood/immune disorder to the pregnancy without specifying the trimester.

• Always sequence an obstetric code (from Chapter 15) as the primary diagnosis when applicable, followed by this code.
• Avoid using this code if a more specific O-code exists for the documented blood or immune disorder complicating pregnancy (e.g., O99.0- for anemia).
• Query the provider for the specific trimester if not documented to allow for more precise coding (O99.111, O99.112, O99.113).