Other chondrocalcinosis, right knee

This code signifies the presence of calcium pyrophosphate dihydrate (CPPD) crystal deposition disease, also known as pseudogout, affecting the right knee joint. It indicates a form of arthritis caused by these crystal deposits, leading to inflammation and joint damage.

Apply this code when documentation confirms chondrocalcinosis in the right knee, and the specific type of chondrocalcinosis is not otherwise specified as familial, primary, or post-traumatic. This diagnosis is typically supported by imaging studies (e.g., X-ray showing chondrocalcinosis) and/or synovial fluid analysis revealing CPPD crystals.

• Ensure laterality is clearly documented as "right knee" to support this specific code.
• Distinguish from other forms of chondrocalcinosis (M11.1-, M11.2-, M11.3-) based on the physician's diagnostic statement.
• Code any associated osteoarthritis or other arthropathies separately, if documented.