M23.9: Internal derangement of knee, unspecified

Internal derangement of the knee is a condition related to the internal structures of the knee joint. It typically refers to a variety of potential issues affecting the smooth functioning of the knee, such as torn or damaged ligaments or menisci (shock-absorbing disks between the bones), loose bodies, or cartilage damage. This condition can be caused by major injuries like sports accidents or by gradual wear and tear linked to aging, obesity, or overuse. Common symptoms can include pain, swelling, stiffness, instability within the joint, and sometimes, difficulty in fully bending or straightening the leg. Progression of the disease can lead to impaired knee function and potentially, chronic pain or arthritis. It usually affects the musculoskeletal system with focus on the knee region.

Patient Disclaimer

The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.

If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.

For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.