Stiffness of unspecified hip, not elsewhere classified

This diagnosis code signifies a patient experiencing restricted movement or rigidity in their hip joint, where the specific cause of the stiffness is not identified or documented. It indicates a symptom rather than a definitive underlying pathology, and the affected side of the hip is also unspecified.

This code is appropriate when documentation clearly states "stiffness of hip" without further specification of the underlying etiology (e.g., osteoarthritis, trauma, inflammatory arthritis) or laterality. It should be used when the physician's assessment focuses on the symptom of stiffness and no more specific diagnosis can be made at the time of coding.

• Avoid using this code if a more specific diagnosis for the hip stiffness (e.g., M16.9 for unspecified hip osteoarthritis) is documented.
• Query the provider for laterality (left, right, bilateral) if not specified, as more specific codes exist (M25.651, M25.652, M25.653).
• This code is often a temporary diagnosis while further workup is pending to determine the definitive cause of the hip stiffness.