ICD-10-CM
ICD-10 code for TAC (trigeminal autonomic cephalgia) NEC intractable: G44.091
The ICD-10-CM index points "TAC (trigeminal autonomic cephalgia) NEC intractable" to G44.091, Other trigeminal autonomic cephalgias (TAC), intractable. G44.091 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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More specific codes in G44
A header groups codes and is not billed. A billable code is one you can report.
- G44Other headache syndromesHeader
- G44.0Cluster headaches and other trigeminal autonomic cephalgias (TAC)Header
- G44.00Cluster headache syndrome, unspecifiedHeader
- G44.001Cluster headache syndrome, unspecified, intractableBillable
- G44.009Cluster headache syndrome, unspecified, not intractableBillable
- G44.01Episodic cluster headacheHeader
- G44.011Episodic cluster headache, intractableBillable
- G44.019Episodic cluster headache, not intractableBillable
- G44.02Chronic cluster headacheHeader
- G44.021Chronic cluster headache, intractableBillable
- G44.029Chronic cluster headache, not intractableBillable
- G44.03Episodic paroxysmal hemicraniaHeader
- G44.031Episodic paroxysmal hemicrania, intractableBillable
- G44.039Episodic paroxysmal hemicrania, not intractableBillable
- G44.04Chronic paroxysmal hemicraniaHeader
- G44.041Chronic paroxysmal hemicrania, intractableBillable
- G44.049Chronic paroxysmal hemicrania, not intractableBillable
- G44.05Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT)Header
- G44.051Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractableBillable
- G44.059Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractableBillable
- G44.09Other trigeminal autonomic cephalgias (TAC)Header
- G44.091Other trigeminal autonomic cephalgias (TAC), intractableBillable
- G44.099Other trigeminal autonomic cephalgias (TAC), not intractableBillable
- G44.1Vascular headache, not elsewhere classifiedBillable
- G44.2Tension-type headacheHeader
- G44.20Tension-type headache, unspecifiedHeader
- G44.201Tension-type headache, unspecified, intractableBillable
- G44.209Tension-type headache, unspecified, not intractableBillable
- G44.21Episodic tension-type headacheHeader
- G44.211Episodic tension-type headache, intractableBillable
- G44.219Episodic tension-type headache, not intractableBillable
- G44.22Chronic tension-type headacheHeader
- G44.221Chronic tension-type headache, intractableBillable
- G44.229Chronic tension-type headache, not intractableBillable
- G44.3Post-traumatic headacheHeader
- G44.30Post-traumatic headache, unspecifiedHeader
- G44.301Post-traumatic headache, unspecified, intractableBillable
- G44.309Post-traumatic headache, unspecified, not intractableBillable
- G44.31Acute post-traumatic headacheHeader
- G44.311Acute post-traumatic headache, intractableBillable
- G44.319Acute post-traumatic headache, not intractableBillable
- G44.32Chronic post-traumatic headacheHeader
- G44.321Chronic post-traumatic headache, intractableBillable
- G44.329Chronic post-traumatic headache, not intractableBillable
- G44.4Drug-induced headache, not elsewhere classifiedHeader
- G44.40Drug-induced headache, not elsewhere classified, not intractableBillable
- G44.41Drug-induced headache, not elsewhere classified, intractableBillable
- G44.5Complicated headache syndromesHeader
- G44.51Hemicrania continuaBillable
- G44.52New daily persistent headache (NDPH)Billable
- G44.53Primary thunderclap headacheBillable
- G44.59Other complicated headache syndromeBillable
- G44.8Other specified headache syndromesHeader
- G44.81Hypnic headacheBillable
- G44.82Headache associated with sexual activityBillable
- G44.83Primary cough headacheBillable
- G44.84Primary exertional headacheBillable
- G44.85Primary stabbing headacheBillable
- G44.86Cervicogenic headacheBillable
- G44.89Other headache syndromeBillable
Excludes1
Excludes1 means these codes are not reported together.
From G44. A note on a category applies to every code under it.
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.
From G44. A note on a category applies to every code under it.
Related conditions
Related pages
- G44.091 code detailsNotes, nearby codes, CMS-HCC group
- Category G44Every code under it
- Chapter 6Diseases of the nervous system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for TAC (trigeminal autonomic cephalgia) NEC intractable?
The ICD-10-CM index points "TAC (trigeminal autonomic cephalgia) NEC intractable" to G44.091, Other trigeminal autonomic cephalgias (TAC), intractable. G44.091 is a billable code.
Is G44.091 billable?
Yes. G44.091 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to G44.091?
The CDC tabular list gives 1 Excludes1 note (not coded together), 4 Excludes2 notes (may be coded together when both are documented) for G44.091 and the categories above it. They are listed on this page.
What chapter is G44.091 in?
Chapter 6. Diseases of the nervous system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.