Abscess of bursa, right knee

This code signifies an acute or chronic localized collection of pus within a bursa located in the right knee. This inflammatory condition results from infection, often bacterial, leading to pain, swelling, and warmth in the affected joint area.

Assign this code when documentation clearly indicates an abscess formation within a bursa of the right knee. This typically follows a diagnosis of septic bursitis or an infected bursa, confirmed by physical examination, imaging, or aspiration findings.

• Ensure laterality is explicitly documented as "right knee"; avoid using for unspecified or left knee involvement.
• Distinguish from non-infectious bursitis (e.g., M70.41) which lacks pus formation.
• Consider sequencing this code as a primary diagnosis if it is the reason for the encounter, or as a secondary diagnosis if it complicates another condition.