Maternal hypotension syndrome, unspecified trimester

This code describes a condition where a pregnant patient experiences a drop in blood pressure, leading to symptoms such as dizziness, lightheadedness, or syncope, specifically when lying on her back. This is often caused by compression of the inferior vena cava by the gravid uterus, reducing venous return to the heart.

Apply this code when documentation indicates a pregnant patient is experiencing symptoms of hypotension related to her position, without further specification of the trimester. This diagnosis is typically supported by physician notes describing positional hypotension, supine hypotensive syndrome, or similar clinical presentations.

• Do not use this code if the specific trimester is documented; instead, use the more specific codes (O26.51-O26.53).
• Ensure the documentation clearly links the hypotension to the pregnancy and a positional component.
• Code any associated symptoms (e.g., R42 for dizziness and giddiness) separately if documented.