G43.831

Billable

Menstrual migraine, intractable, with status migrainosus

HCC Category Mapping

RxHCCHCC 166 — Migraine

0.000

What This Code Means

Migraine headaches that occur around menstrual periods and do not respond well to treatment, with prolonged migraine symptoms lasting 72 hours or more.

Coding Tips

•Intractable means the migraine is resistant to treatment; ensure documentation shows failed treatment attempts
•Status migrainosus indicates duration exceeding 72 hours; both conditions must be documented

Clinical Significance

Menstrual migraine is a hormonally triggered migraine subtype occurring in relation to the menstrual cycle, typically within 2 days before to 3 days after menstruation onset. This diagnosis is clinically important because it guides hormone-specific treatment strategies including estrogen supplementation, triptans timed to the menstrual cycle, and contraceptive management. Accurate coding captures the hormonal etiology which affects both treatment planning and pharmacy utilization predictions.

Documentation Requirements

✓Temporal relationship to menstrual cycle documented (onset within day -2 to day +3 of menses)
✓Pattern occurring in at least 2 out of 3 consecutive menstrual cycles
✓Migraine features present (unilateral, pulsating, moderate-severe intensity, nausea/photophobia)
✓Distinction between pure menstrual migraine (only perimenstrual) vs. menstrually related migraine (also occurs at other times)
✓Intractability status: failed menstrual-specific preventive approaches
✓Status migrainosus with episode >72 hours if applicable
✓Headache diary correlating attacks with menstrual dates
✓Hormonal medication history (oral contraceptives, hormone replacement therapy)

Commonly Confused Codes

G43.001-G43.019 (Migraine without aura) — use when migraine is not specifically linked to menstrual cycle timing G43.101-G43.119 (Migraine with aura) — menstrual migraine typically presents without aura; if aura present, consider dual coding N94.3 (Premenstrual tension syndrome) — PMS is not migraine; these are distinct conditions though they may coexist G43.801-G43.819 (Other migraine) — menstrual migraine has its own specific codes; do not use 'other'G43.901-G43.919 (Migraine, unspecified) — avoid when menstrual pattern is documented

Code Hierarchy

└G43Migraine └G43.8Other migraine └G43.83Menstrual migraine, intractable └G43.831Menstrual migraine, intractable, with status migrainosus

└G43.831Menstrual migraine, intractable, with status migrainosus