Abscess of tendon sheath, other site

This code describes an infection characterized by a localized collection of pus within the synovial sheath surrounding a tendon, occurring in an anatomical site not specified by more precise codes. This condition, also known as suppurative tenosynovitis, typically results from bacterial invasion following trauma, puncture wounds, or spread from adjacent infections.

Apply this code when documentation clearly indicates an abscess affecting a tendon sheath in a location other than the hand, foot, or wrist. Supporting documentation should include physician notes detailing the presence of pus, inflammation, and involvement of the tendon sheath, often confirmed by imaging or surgical findings.

• Ensure the documentation specifies "abscess" and "tendon sheath" to differentiate from general cellulitis or tendinitis.
• Always check for more specific codes for abscess of tendon sheath in the hand (M65.04-), foot (M65.07-), or wrist (M65.03-).
• Code any associated infectious organism (e.g., B95-B97) as an additional diagnosis if identified and documented.