G44.84 vs R51.0
G44.84 (Primary exertional headache) compared with R51.0 (Headache with orthostatic component, not elsewhere classified), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. G44.84 carries an Excludes2 note covering R51.0: “headache with orthostatic or positional component, not elsewhere classified (R51.0)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Yes, when both are documented. R51.0 carries an Excludes2 note covering G44.84: “migraine and other headache syndromes (G43-G44)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| G44.84Primary exertional headache | R51.0Headache with orthostatic component, not elsewhere classified | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Primary exertional headache is a billable ICD-10-CM diagnosis code (G44.84). | Headache with orthostatic component, not elsewhere classified is a billable ICD-10-CM diagnosis code (R51.0). |
| Includes | — | Headache with positional component, not elsewhere classified |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources