Synovial cyst of popliteal space [Baker], right knee

This code identifies a synovial cyst, commonly known as a Baker's cyst, located specifically in the popliteal space of the right knee. This cyst is a fluid-filled sac that forms due to fluid distension of the gastrocnemius-semimembranosus bursa, often associated with underlying knee joint pathology.

Apply this code when documentation confirms a Baker's cyst affecting the right knee. This typically occurs in scenarios involving knee pain, swelling, or a palpable mass in the posterior aspect of the knee. Supporting documentation includes imaging reports (e.g., ultrasound, MRI) confirming the cyst's presence and location, or physician notes detailing the diagnosis of a right popliteal synovial cyst.

• Always specify laterality; this code is for the right knee only.
• Do not use this code for cysts in other knee locations or for unspecified laterality.
• Consider coding any underlying knee pathology (e.g., osteoarthritis, meniscal tear) that may be contributing to the Baker's cyst formation.