Hydroxyapatite deposition disease, unsp ankle and foot

This code describes a condition characterized by the deposition of calcium hydroxyapatite crystals in the soft tissues around the joints of the ankle and foot. This crystal deposition can lead to inflammation, pain, and limited range of motion, often mimicking other arthropathies.

Use this code when documentation specifies hydroxyapatite deposition disease affecting an unspecified ankle or foot. This is appropriate when the laterality (right or left) is not documented or cannot be determined from the medical record.

• Avoid using this code if laterality is specified; instead, use the more specific codes for right (M11.071) or left (M11.072) ankle/foot.
• Ensure the documentation clearly states "hydroxyapatite deposition disease" or "HADD" to support this diagnosis.
• Consider co-reporting codes for associated symptoms like pain (e.g., M25.57-) if documented and not inherent to the HADD diagnosis.