Unspecified placental disorder, second trimester

This code signifies an uncharacterized abnormality of the placenta occurring during the second trimester of pregnancy. It indicates that a placental issue has been identified, but its specific nature (e.g., abruption, previa, infarction) has not been determined or documented.

Use this code when a placental disorder is suspected or identified in the second trimester, but the provider's documentation does not specify the exact type of disorder. This typically occurs when initial imaging or clinical findings suggest a problem, but further diagnostic workup is pending or inconclusive. Documentation should clearly state "unspecified placental disorder" or similar phrasing within the second trimester.

• Avoid using this code if a more specific placental disorder (e.g., O43.1- for placental abruption) is documented.
• Always review the entire medical record for more specific diagnoses before assigning this unspecified code.
• If the trimester is not specified, default to O43.90; if the third trimester, use O43.93.