When to Refer to a Headache Specialist — and How to Manage the Gap
Most migraine patients don't need a specialist — but when they do, start preventive therapy now rather than waiting six months for the appointment.
Most migraine patients don't need a specialist — and that's not a compromise. The majority of migraine management falls well within primary care scope: establishing diagnosis, initiating acute treatment, starting first and second-line preventives, filing prior authorizations for CGRP preventives, and managing the behavioral and lifestyle components documented in Card 6. This library exists because the tools and knowledge to do this well haven't been accessible in primary care — not because primary care can't handle migraine.
Refer when diagnosis is uncertain — that's the highest-priority trigger. Red flag headaches require urgent evaluation: thunderclap onset, new headache after age 50, progressive worsening over weeks, headache with fever and meningeal signs, headache with focal neurological deficit that doesn't fit known migraine aura pattern. These may not need a headache specialist specifically — they may need neuroimaging or a neurologist before a headache-focused evaluation. Beyond red flags, atypical presentations that don't fit ICHD-3 criteria clearly — daily headache with no prior migraine history, headache worsened by Valsalva or positional changes, unilateral autonomic features suggesting TAC — are diagnostic referral triggers.
Refer when treatment is failing after a genuine attempt. Failed two adequate preventive trials and CGRP preventive is not working or is contraindicated with no clear next step — refer. Chronic migraine not responding to Botox after two cycles with no documented adequate frequency reduction — refer. Intractable medication overuse headache despite structured withdrawal attempt — refer. These are clinical dead ends that indicate the patient needs a specialist's diagnostic reconsideration or access to treatments not available in primary care.
Refer for conditions that require specialist management from the start. Cluster headache — particularly chronic cluster — belongs with a specialist even if you initiate bridge treatment while the appointment is pending; Card 10 covers what to start immediately. New daily persistent headache, idiopathic intracranial hypertension, and medication-refractory chronic migraine all benefit from specialist management from diagnosis.
Don't wait for the appointment to treat. If the patient has a clear migraine diagnosis and hasn't started preventive therapy, start it now. If they are a CGRP candidate, file the PA — the Vault handles this regardless of whether a specialist is involved. Optimize acute treatment. Document rigorously. The referral queue can be six months or more — that's six months of treatable migraine that shouldn't go unmanaged.
Write a referral letter that does clinical work. "Please evaluate and manage" wastes the specialist's first visit. Give them what they need: diagnosis with ICD-10 code, attack frequency and pattern, current disability score, complete medication history with doses and reasons for stopping, current acute and preventive treatment, imaging results, and your specific question. The Vault's referral letter template structures this automatically.
Telehealth is a legitimate option. For patients in areas with severe shortages — Wyoming has 9 headache specialists for 580,000 people; New Mexico has similar gaps — several academic headache centers offer telehealth consultations across state lines where licensing allows. The Vault's specialist directory includes telehealth-available providers.
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Run a PA — free →Citations: Headache Vault National Provider Analysis (CMS Medicare Part D claims data, 2024) | ICHD-3 diagnostic criteria — ichd-3.org | AHS Consensus 2021 — Ailani J et al., Headache 2021;61(7):1021-1039. doi:10.1111/head.14153.