Other specified crystal arthropathies, unspecified hip

This code signifies a diagnosis of an arthropathy of the hip joint caused by the deposition of crystals other than those associated with gout or calcium pyrophosphate deposition disease (CPPD). It indicates that the specific type of crystal involved has been identified, but the laterality of the affected hip is not documented.

Use this code when medical record documentation confirms a crystal-induced arthritis of the hip, and the specific crystal type is known but is not uric acid or calcium pyrophosphate. This code is appropriate when the physician's notes do not specify whether the right or left hip is affected.

• Ensure the documentation clearly identifies the presence of a crystal arthropathy and specifies the crystal type (e.g., calcium oxalate, hydroxyapatite) if not gout or CPPD.
• Avoid using this code if the specific crystal type is unknown; instead, consider codes for unspecified crystal arthropathy.
• Always attempt to clarify laterality with the provider if not documented, as more specific codes (M11.851, M11.852) exist for right and left hip involvement.