Other streptococcal arthritis, unspecified knee

This code signifies an inflammatory joint condition of the knee caused by a streptococcal bacterial infection, where the specific type of streptococcus is not identified. It represents an acute or subacute bacterial arthritis affecting the knee joint due to streptococcal pathogens.

Use this code when documentation confirms streptococcal arthritis affecting an unspecified knee, and the specific streptococcal species (e.g., Group A, Group B) is not documented. This code is appropriate when the physician's diagnosis explicitly states "streptococcal arthritis, knee" without further specification of the laterality or bacterial type.

• Ensure documentation clearly states "streptococcal" as the causative agent for the arthritis.
• Avoid using this code if the specific streptococcal species (e.g., Group A Streptococcus) is identified; instead, use a more specific code from the M00.2 category.
• If laterality (right or left knee) is documented, choose a more specific code (M00.261 or M00.262) instead of this unspecified code.