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ICD-10-CM Root
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G44
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G44.5
G44.5
Complicated headache syndromes
G44.51
Hemicrania continua
Billable
Notes
G44.52
New daily persistent headache (NDPH)
Billable
Notes
G44.53
Primary thunderclap headache
Billable
Notes
G44.59
Other complicated headache syndrome
Billable
Notes