G00–G99
Diseases of the Nervous System
Parkinson's, epilepsy, migraine, neuropathy
G43.B0
Ophthalmoplegic migraine, not intractable
Billable
G43.B1
Ophthalmoplegic migraine, intractable
Billable
G43.C
Periodic headache syndromes in child or adult
Non-billable
G43.C0
Periodic headache syndromes in child or adult, not intractable
Billable
G43.C1
Periodic headache syndromes in child or adult, intractable
Billable
G43.D
Abdominal migraine
Non-billable
G43.D0
Abdominal migraine, not intractable
Billable
G43.D1
Abdominal migraine, intractable
Billable
G43.E
Chronic migraine with aura
Non-billable
G43.E0
Chronic migraine with aura, not intractable
Non-billable
G43.E01
Chronic migraine with aura, not intractable, with status migrainosus
Billable
G43.E09
Chronic migraine with aura, not intractable, without status migrainosus
Billable
G43.E1
Chronic migraine with aura, intractable
Non-billable
G43.E11
Chronic migraine with aura, intractable, with status migrainosus
Billable
G43.E19
Chronic migraine with aura, intractable, without status migrainosus
Billable
G44
Other headache syndromes
Non-billable
G44.0
Cluster headaches and other trigeminal autonomic cephalgias (TAC)
Non-billable
G44.00
Cluster headache syndrome, unspecified
Non-billable
G44.001
Cluster headache syndrome, unspecified, intractable
Billable
G44.009
Cluster headache syndrome, unspecified, not intractable
Billable
G44.01
Episodic cluster headache
Non-billable
G44.011
Episodic cluster headache, intractable
Billable
G44.019
Episodic cluster headache, not intractable
Billable
G44.02
Chronic cluster headache
Non-billable
G44.021
Chronic cluster headache, intractable
Billable
G44.029
Chronic cluster headache, not intractable
Billable
G44.03
Episodic paroxysmal hemicrania
Non-billable
G44.031
Episodic paroxysmal hemicrania, intractable
Billable
G44.039
Episodic paroxysmal hemicrania, not intractable
Billable
G44.04
Chronic paroxysmal hemicrania
Non-billable
G44.041
Chronic paroxysmal hemicrania, intractable
Billable
G44.049
Chronic paroxysmal hemicrania, not intractable
Billable
G44.05
Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT)
Non-billable
G44.051
Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable
Billable
G44.059
Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable
Billable
G44.09
Other trigeminal autonomic cephalgias (TAC)
Non-billable
G44.091
Other trigeminal autonomic cephalgias (TAC), intractable
Billable
G44.099
Other trigeminal autonomic cephalgias (TAC), not intractable
Billable
G44.1
Vascular headache, not elsewhere classified
Billable
G44.2
Tension-type headache
Non-billable
G44.20
Tension-type headache, unspecified
Non-billable
G44.201
Tension-type headache, unspecified, intractable
Billable
G44.209
Tension-type headache, unspecified, not intractable
Billable
G44.21
Episodic tension-type headache
Non-billable
G44.211
Episodic tension-type headache, intractable
Billable
G44.219
Episodic tension-type headache, not intractable
Billable
G44.22
Chronic tension-type headache
Non-billable
G44.221
Chronic tension-type headache, intractable
Billable
G44.229
Chronic tension-type headache, not intractable
Billable
G44.3
Post-traumatic headache
Non-billable
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