Deep phlebothrombosis in the puerperium

This code signifies the presence of a deep vein thrombosis (DVT) that develops during the puerperium, the period immediately following childbirth. It specifically refers to the formation of a blood clot within a deep vein, typically in the legs or pelvis, occurring postpartum.

Apply this code when documentation clearly indicates a DVT diagnosis in a patient who is within the puerperal period (generally up to six weeks postpartum). Supporting documentation should include diagnostic imaging (e.g., ultrasound) confirming the DVT and a clear link to the postpartum state.

• Ensure the documentation specifies "deep" phlebothrombosis; superficial thrombophlebitis would be coded differently.
• Confirm the timing of the DVT relative to delivery; if it occurred during pregnancy, a different O-code would be appropriate.
• Always sequence this code as a secondary diagnosis if the encounter is for the management of the DVT itself, with the primary code reflecting the reason for the encounter.