G44.099
ICD-10-CMThis code signifies a type of primary headache disorder characterized by unilateral head pain accompanied by ipsilateral autonomic symptoms, such as conjunctival injection, lacrimation, nasal congestion, rhinorrhea, forehead and facial sweating, miosis, or ptosis. These are severe, short-lasting headaches that are not adequately managed by current treatment.
Use this code for patients diagnosed with trigeminal autonomic cephalgias (TACs) other than cluster headache, paroxysmal hemicrania, or short-lasting unilateral neuralgiform headache attacks (SUNCT/SUNA), where the condition is not intractable. Documentation should clearly specify the type of TAC (e.g., hemicrania continua, primary stabbing headache) and confirm that the pain is not resistant to treatment.
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