G44.8
Other specified headache syndromes
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 14 never code together
G44code
G44.8code
G00-G99chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes
No further instructional notes apply.
Index entries leading here filed at null
No alphabetic index entry points at this code.
Alongside this code 6 same parent — G44
G44.0 Cluster headaches and oth trigeminal autonm cephalgias (TAC) category G44.1 Vascular headache, not elsewhere classified G44.2 Tension-type headache category G44.3 Post-traumatic headache category G44.4 Drug-induced headache, not elsewhere classified category G44.5 Complicated headache syndromes category
Subordinate codes 7
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.