M46.1: Sacroiliitis, not elsewhere classified

The sacrum is part of the spine, and a joint connects it to the pelvic bone on both sides. There is very little movement in these joints because they are stabilized by tight ligaments.

When this joint is inflamed, the location may be painful. It may also be that you are unable to move your back properly and that you avoid particular movements.

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.