Diseases of the resp sys comp pregnancy, first trimester

This code signifies a pre-existing or newly diagnosed respiratory condition that is adversely affecting a pregnancy during its initial three months. It covers a broad range of respiratory illnesses, such as asthma, bronchitis, pneumonia, or chronic obstructive pulmonary disease (COPD), when they pose a complication to the mother's health or the pregnancy's progression in the first trimester.

Apply this code when a pregnant patient in her first trimester presents with a respiratory system disease that is documented as complicating her pregnancy. This includes situations where the respiratory condition requires specific management due to the pregnancy, or where the pregnancy exacerbates the respiratory condition. Documentation should clearly link the respiratory disease to the pregnancy and specify the first trimester.

• Always sequence this code as a secondary diagnosis, following the code for the specific respiratory condition (e.g., J45.901 for asthma).
• Ensure the medical record explicitly states "first trimester" or provides gestational age that falls within the first trimester (weeks 0-13).
• Do not use this code if the respiratory condition is merely present but not documented as complicating the pregnancy.