ICD-9-CM 349.81 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 349.81 should only be used for claims with a date of service on or before September 30, 2015. For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
Discharge of cerebrospinal fluid through the nose. Common etiologies include trauma, neoplasms, and prior surgery, although the condition may occur spontaneously. (otolaryngol head neck surg 1997 apr;116(4):442-9)
2015 ICD-9-CM Diagnosis Code 349.81 
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cerebrospinal (fluid) 
