ICD-10 Code G44.52 – New daily persistent headache (NDPH) (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G44.52 – New daily persistent headache (NDPH)
What it is
G44.52 identifies new daily persistent headache, a headache syndrome that starts abruptly and then becomes continuous every day. Use it when documentation shows a clearly remembered onset with persistent daily headache.
Clinical signs
Clinical features vary; refer to documentation. Typical descriptions include a sudden onset of headache that becomes daily and unremitting, often with a patient able to recall the exact start date.
When to use this code
Use G44.52 when the record specifically states new daily persistent headache or clearly describes a headache that began on a known date and remained daily since onset. It is appropriate when the clinician documents this pattern as the diagnosis, not just a nonspecific chronic headache.
Do not use for
Do not use this code for migraine, tension-type headache, cluster headache, or other named headache disorders unless the provider documents NDPH. If the onset pattern is unclear, check documentation.
Coding tip
Confirm the chart documents both sudden onset and daily persistence before assigning G44.52.