G44.40

Drug-induced headache, not elsewhere classified, not intractable

Billable code

This code does not map to a risk-adjusting HCC in the loaded models.

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

Inherited from G44.4Drug-induced headache, not elsewhere classified

Use additional

code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Synonyms

Medication overuse headache

Inherited from G44Other headache syndromes

Excludes 1

headache NOS (R51.9)

Excludes 2

atypical facial pain (G50.1) headache due to lumbar puncture (G97.1) migraines (G43.-) trigeminal neuralgia (G50.0)

Inherited from chapter 6Diseases of the nervous system

Excludes 2

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)

Official Guidelines for G44.40

FY 2026 ›

I.C.6Chapter-specific guidanceChapter 6: Diseases of the Nervous System (G00-G99)

Subsections

Find G44.40 in the alphabetic index

6 index paths lead to this code