G43.91 Migraine, unspecified, intractable

Non-billable header with 2 child codes.

Applicable to

• Migraine, unspecified, with refractory migraine

Applies from G43 Migraine

Excludes1 (never code together)

• headache NOS (R51.9)
• lower half migraine (G44.00)

Excludes2 (not included here)

• headache syndromes (G44.-)

Use additional code

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

Notes

• the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled

Codes under G43.91

• G43.911 Migraine, unspecified, intractable, with status migrainosus
• G43.919 Migraine, unspecified, intractable, without status migrainosus

Code annotations containing back-references to G43.91

Back-references to G43

• Type 2 Excludes: G44 Other headache syndromes ("migraines (G43.-)")
• Type 2 Excludes: G44.1 Vascular headache, not elsewhere classified ("migraine (G43.-)")
• Type 2 Excludes: G89 Pain, not elsewhere classified ("migraines (G43.-)")
• Type 2 Excludes: R51 Headache ("migraine and other headache syndromes (G43-G44)")

Nearby codes

• G43.839 Menstrual migraine, intractable, without status migrainosus
• G43.9 Migraine, unspecified
• G43.90 Migraine, unspecified, not intractable
• G43.901 Migraine, unspecified, not intractable, with status migrainosus
• G43.909 Migraine, unspecified, not intractable, without status migrainosus
• G43.91 Migraine, unspecified, intractable (this code)
• G43.911 Migraine, unspecified, intractable, with status migrainosus
• G43.919 Migraine, unspecified, intractable, without status migrainosus
• G43.E Chronic migraine with aura
• G43.E0 Chronic migraine with aura, not intractable
• G43.E01 Chronic migraine with aura, not intractable, with status migrainosus