Phlbts and thombophlb of unsp deep vessels of low extrm, bi

This code signifies inflammation of a vein (phlebitis) or inflammation of a vein with a blood clot (thrombophlebitis) affecting deep veins in both lower extremities. The specific deep vessel involved is not documented or is unknown.

Apply this code when documentation clearly indicates bilateral involvement of unspecified deep veins in the lower limbs with phlebitis or thrombophlebitis. This is appropriate when the physician's notes do not specify a particular deep vein (e.g., femoral, popliteal) but confirm the condition's presence in both legs.

• Ensure documentation explicitly states "bilateral" and "unspecified deep vessels" of the lower extremities.
• Avoid using this code if a specific deep vein (e.g., femoral, popliteal) is identified; instead, use the more specific code for that vessel.
• Do not confuse with superficial thrombophlebitis, which has distinct codes.