Index to Diseases and Injuries

Headache

Index code:R51.9

with
orthostatic component NEC R51.0
positional component NEC R51.0
allergic NEC G44.89
associated with sexual activity G44.82
cervicogenic G44.86
chronic daily R51.9
cluster G44.009
chronic G44.029
intractable G44.021
not intractable G44.029
episodic G44.019
intractable G44.011
not intractable G44.019
intractable G44.001
not intractable G44.009
cough (primary) G44.83
daily chronic R51.9
drug-induced NEC G44.40
intractable G44.41
not intractable G44.40
exertional (primary) G44.84
histamine G44.009
intractable G44.001
not intractable G44.009
hypnic G44.81
lumbar puncture G97.1
medication overuse G44.40
intractable G44.41
not intractable G44.40
menstrual — see Migraine, menstrual
migraine (type) G43.909 — see also Migraine
nasal septum R51.9
neuralgiform, short lasting unilateral, with conjunctival injection and tearing (SUNCT) G44.059
intractable G44.051
not intractable G44.059
new daily persistent (NDPH) G44.52
orgasmic G44.82
periodic syndromes in adults and children G43.C0
with refractory migraine G43.C1
intractable G43.C1
not intractable G43.C0
without refractory migraine G43.C0
postspinal puncture G97.1
post-traumatic G44.309
acute G44.319
intractable G44.311
not intractable G44.319
chronic G44.329
intractable G44.321
not intractable G44.329
intractable G44.301
not intractable G44.309
pre-menstrual — see Migraine, menstrual
preorgasmic G44.82
primary
cough G44.83
exertional G44.84
stabbing G44.85
thunderclap G44.53
rebound G44.40
intractable G44.41
not intractable G44.40
short lasting unilateral neuralgiform, with conjunctival injection and tearing (SUNCT) G44.059
intractable G44.051
not intractable G44.059
specified syndrome NEC G44.89
spinal and epidural anesthesia - induced T88.59
in labor and delivery O74.5
in pregnancy O29.4-
postpartum, puerperal O89.4
spinal fluid loss (from puncture) G97.1
stabbing (primary) G44.85
tension (-type) G44.209
chronic G44.229
intractable G44.221
not intractable G44.229
episodic G44.219
intractable G44.211
not intractable G44.219
intractable G44.201
not intractable G44.209
thunderclap (primary) G44.53
vascular NEC G44.1

Use the index to find a code, then confirm it in the Tabular List before assigning it. A code ending in a dash is incomplete, and a code in [brackets] is a manifestation code reported after the underlying condition. Search the whole index.

Frequently asked questions

What is the ICD-10-CM code for Headache?

The ICD-10-CM Alphabetic Index directs "Headache" to R51.9. Subterms below it may lead to a more specific code. Always confirm the code in the Tabular List before assigning it.

ICD-10-CM Index to Diseases and Injuries maintained by CDC/NCHS (public domain), from the CMS FY2027 release.