All ICD10 Codes

G44

Non-Billable
ChapterG00–G99
Rankcategory
Official Description

Other headache syndromes

Use a more specific code (1 billable, 6 non-billable)
G44.0Cluster headaches and other trigeminal autonomic cephalgias (TAC)has subcodesG44.1Vascular headache, not elsewhere classifiedG44.2Tension-type headachehas subcodesG44.3Post-traumatic headachehas subcodesG44.4Drug-induced headache, not elsewhere classifiedhas subcodesG44.5Complicated headache syndromeshas subcodesG44.8Other specified headache syndromeshas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 6: Diseases of the Nervous System (G00-G99).

CH6 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
Excludes2(Not included here. Code separately if applicable.)
  • atypical facial pain (G50.1)
  • headache due to lumbar puncture (G97.1)
  • migraines (G43.-)
  • trigeminal neuralgia (G50.0)

Clinical Hierarchy

BillableHas subcodes
CH6Diseases of the nervous system (G00-G99)
G40-G47Episodic and paroxysmal disorders (G40-G47)
G44Other headache syndromesNot billable
G44.0Cluster headaches and other trigeminal autonomic cephalgias (TAC)Subcodes
G44.1Vascular headache, not elsewhere classifiedBillable
G44.2Tension-type headacheSubcodes
G44.3Post-traumatic headacheSubcodes
G44.4Drug-induced headache, not elsewhere classifiedSubcodes
G44.5Complicated headache syndromesSubcodes
G44.8Other specified headache syndromesSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G44:

chapterCH6
Diseases of the nervous system (G00-G99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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