ICD-10-CM 2027
ICD-10 code for exertional primary headache
From the official ICD-10-CM alphabetic index entry “Headache › exertional (primary)”. Page updated September 29, 2026.
About coding exertional primary headache
The ICD-10-CM code for exertional primary headache is G44.84 (Primary exertional headache).
Within G44.8 (other specified headache syndromes), G44.84 is specifically for primary exertional headache. Related codes cover Hypnic headache (G44.81), headache associated with sexual activity (G44.82), primary cough headache (G44.83), primary stabbing headache (G44.85), Cervicogenic headache (G44.86) and other headache syndrome (G44.89).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 102 (Headaches with MCC, relative weight 1.1201) and DRG 103 (Headaches without MCC, relative weight 0.822), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about exertional primary headache ICD-10 codes
What is the ICD-10 code for exertional primary headache?
- G44.84 — Primary exertional headache.
Is G44.84 billable?
- Yes. G44.84 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G44.84 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G44.84 as a principal diagnosis.
Is G44.84 a CC or MCC?
- No. G44.84 is neither a CC nor an MCC under MS-DRG v44.0.