M54.9 – Dorsalgia, unspecified

M54.9 refers to unspecified dorsalgia or back pain without a specified underlying cause or location, while M54.5 refers explicitly to low back pain.

Yes, M54.9 is a billable code that can be used for both inpatient and outpatient medical settings to indicate a diagnosis for reimbursement purposes.

Documentation should include a clear description of the patient's symptoms, any known contributing factors, and additional information necessary to support the diagnosis and treatment plan.