Episodic cluster headache, intractable

This code signifies a severe, unilateral headache disorder characterized by recurrent, short-lived attacks of excruciating pain, often accompanied by autonomic symptoms such as lacrimation, rhinorrhea, and ptosis. "Intractable" indicates that the condition is resistant to standard medical treatment and significantly impacts the patient's quality of life.

Assign this code for patients diagnosed with episodic cluster headaches that have proven difficult to manage with conventional therapies. Documentation should clearly state the diagnosis of episodic cluster headache and explicitly mention its intractable nature, often detailing failed treatment regimens or persistent symptoms despite treatment.

• Ensure documentation specifies "episodic" versus "chronic" cluster headache, as these have distinct codes.
• "Intractable" must be clearly documented by the provider; it cannot be assumed based on treatment history alone.
• Consider co-reporting codes for associated symptoms or complications, if documented.