Deep phlebothrombosis in pregnancy, first trimester

This code signifies the presence of a deep vein thrombosis (DVT) occurring in a pregnant patient during her first trimester. A DVT is a blood clot that forms in a deep vein, typically in the legs or pelvis, posing a risk of pulmonary embolism.

Apply this code when documentation explicitly states a diagnosis of deep phlebothrombosis or deep vein thrombosis in a pregnant patient whose gestational age is within the first trimester (weeks 0-13). Supporting documentation should include diagnostic imaging (e.g., ultrasound) confirming the DVT.

• Always confirm the trimester of pregnancy documented by the provider.
• Do not use this code for superficial thrombophlebitis; a different code would apply.
• Sequence this code as a primary diagnosis if the DVT is the reason for the encounter, or as a secondary diagnosis if it's a co-morbidity.