Oth mental disorders complicating pregnancy, third trimester

This code signifies the presence of a mental disorder, other than those specifically classified elsewhere (e.g., substance-related, mood disorders), that is impacting a pregnancy during the third trimester. It indicates that the mental health condition is a complicating factor in the management of the pregnancy.

Apply this code when a pregnant patient in her third trimester is diagnosed with a mental disorder such as an anxiety disorder, personality disorder, or adjustment disorder, and the provider explicitly documents its impact on the pregnancy. Documentation should clearly link the mental health condition to the pregnancy's course or management.

• Always sequence this code after the primary mental health diagnosis (e.g., F41.1 for generalized anxiety disorder).
• Ensure the medical record specifies the third trimester; otherwise, a less specific trimester code or an unspecified trimester code would be more appropriate.
• Distinguish from O99.31- (mental disorders complicating pregnancy, childbirth, and the puerperium, antepartum) which is for conditions like schizophrenia or bipolar disorder.