New daily persistent headache (NDPH)

This code signifies a headache disorder characterized by a sudden, clearly remembered onset of continuous daily headache that persists for at least three months. The headache is typically unremitting from its onset, without significant improvement or remission. Patients often describe it as a new type of headache for them.

Assign this code for patients presenting with a persistent, unremitting daily headache that began abruptly and has been present for three months or longer. Documentation should clearly state "new daily persistent headache" or describe the characteristic sudden onset and continuous nature. This diagnosis requires the exclusion of other secondary causes of continuous headache.

• Ensure documentation specifies the sudden onset and continuous nature of the headache, distinguishing it from chronic migraine or tension-type headache.
• Do not use this code for chronic daily headaches that evolved gradually from episodic headaches.
• Always review for any underlying secondary causes of headache that would be coded first.