G43.819
BillableOther migraine, intractable, without status migrainosus
HCC Category Mapping
RxHCCHCC 166 — Migraine
0.000What This Code Means
An unusual or atypical type of migraine that is difficult to treat and does not respond well to standard medications, and the patient is not currently in a prolonged migraine attack.
Coding Tips
- •Document the atypical features and failed treatment attempts with multiple migraine medications to support the intractable designation.
- •The '19' suffix indicates intractable without status migrainosus; ensure the current episode is not in continuous migraine phase.
Clinical Significance
Other migraine codes capture migraine subtypes that do not fit standard categories such as retinal migraine, vestibular migraine, or migraine variants not elsewhere classified. These codes are important for accurately representing atypical presentations that still carry significant clinical burden and treatment needs. Proper use prevents both overcoding of more specific subtypes and undercoding to unspecified migraine.
Documentation Requirements
- ✓Specific migraine variant type documented by provider (e.g., retinal, vestibular, basilar-type features)
- ✓Clinical features that distinguish this from standard migraine with or without aura
- ✓Reason the condition does not fit a more specific migraine code category
- ✓Intractability status documented
- ✓Episode duration documented
- ✓Neurological examination findings specific to the variant type
- ✓Diagnostic workup results supporting the specific migraine variant diagnosis
Commonly Confused Codes
G43.001-G43.019 (Migraine without aura) — use when presentation is classic migraine without aura featuresG43.101-G43.119 (Migraine with aura) — use for typical visual/sensory aura presentationsG43.401-G43.419 (Hemiplegic migraine) — has its own specific code; do not use 'other' for hemiplegic typeG43.901-G43.919 (Migraine, unspecified) — use only when type is truly not specified; 'other' requires a documented variant typeH34.x (Retinal vascular occlusions) — retinal migraine involves transient monocular vision loss, not permanent vascular occlusion
Code Hierarchy
└G43Migraine└G43.8Other migraine└G43.81Other migraine, intractable└G43.819Other migraine, intractable, without status migrainosus
└G43.819Other migraine, intractable, without status migrainosus