ICD-10 · PDGM grouping
G44 Other headache syndromes
All 40 codes in the G44 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
40
Can lead a claim
40
Cannot lead a claim
0
What CMS assigns to G44
All 40 codes group to MMTA - Other (39) and Musculoskeletal Rehabilitation (1). None of the 40 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in G44
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| G44.0 Cluster headaches and other trigeminal autonomic cephalgias (TAC) | ||||
| G44.00 Cluster headache syndrome, unspecified | ||||
| G44.001 | Cluster headache syndrome, unspecified, intractable | Can lead a claim | A | None |
| G44.009 | Cluster headache syndrome, unspecified, not intractable | Can lead a claim | A | None |
| G44.01 Episodic cluster headache | ||||
| G44.011 | Episodic cluster headache, intractable | Can lead a claim | A | None |
| G44.019 | Episodic cluster headache, not intractable | Can lead a claim | A | None |
| G44.02 Chronic cluster headache | ||||
| G44.021 | Chronic cluster headache, intractable | Can lead a claim | A | None |
| G44.029 | Chronic cluster headache, not intractable | Can lead a claim | A | None |
| G44.03 Episodic paroxysmal hemicrania | ||||
| G44.031 | Episodic paroxysmal hemicrania, intractable | Can lead a claim | A | None |
| G44.039 | Episodic paroxysmal hemicrania, not intractable | Can lead a claim | A | None |
| G44.04 Chronic paroxysmal hemicrania | ||||
| G44.041 | Chronic paroxysmal hemicrania, intractable | Can lead a claim | A | None |
| G44.049 | Chronic paroxysmal hemicrania, not intractable | Can lead a claim | A | None |
| G44.05 Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT) | ||||
| G44.051 | Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractableCMS: Shrt lst unil nerlgif hdache w cnjnct inject/tear, ntrct | Can lead a claim | A | None |
| G44.059 | Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractableCMS: Shrt lst unil nerlgif hdache w cnjnct inject/tear, not ntrct | Can lead a claim | A | None |
| G44.09 Other trigeminal autonomic cephalgias (TAC) | ||||
| G44.091 | Other trigeminal autonomic cephalgias (TAC), intractable | Can lead a claim | A | None |
| G44.099 | Other trigeminal autonomic cephalgias (TAC), not intractable | Can lead a claim | A | None |
| G44.1 | Vascular headache, not elsewhere classified | Can lead a claim | A | None |
| G44.2 Tension-type headache | ||||
| G44.20 Tension-type headache, unspecified | ||||
| G44.201 | Tension-type headache, unspecified, intractable | Can lead a claim | A | None |
| G44.209 | Tension-type headache, unspecified, not intractable | Can lead a claim | A | None |
| G44.21 Episodic tension-type headache | ||||
| G44.211 | Episodic tension-type headache, intractable | Can lead a claim | A | None |
| G44.219 | Episodic tension-type headache, not intractable | Can lead a claim | A | None |
| G44.22 Chronic tension-type headache | ||||
| G44.221 | Chronic tension-type headache, intractable | Can lead a claim | A | None |
| G44.229 | Chronic tension-type headache, not intractable | Can lead a claim | A | None |
| G44.3 Post-traumatic headache | ||||
| G44.30 Post-traumatic headache, unspecified | ||||
| G44.301 | Post-traumatic headache, unspecified, intractable | Can lead a claim | A | None |
| G44.309 | Post-traumatic headache, unspecified, not intractable | Can lead a claim | A | None |
| G44.31 Acute post-traumatic headache | ||||
| G44.311 | Acute post-traumatic headache, intractable | Can lead a claim | A | None |
| G44.319 | Acute post-traumatic headache, not intractable | Can lead a claim | A | None |
| G44.32 Chronic post-traumatic headache | ||||
| G44.321 | Chronic post-traumatic headache, intractable | Can lead a claim | A | None |
| G44.329 | Chronic post-traumatic headache, not intractable | Can lead a claim | A | None |
| G44.4 Drug-induced headache, not elsewhere classified | ||||
| G44.40 | Drug-induced headache, not elsewhere classified, not intractableCMS: Drug-induced headache, NEC, not intractable | Can lead a claim | A | None |
| G44.41 | Drug-induced headache, not elsewhere classified, intractable | Can lead a claim | A | None |
| G44.5 Complicated headache syndromes | ||||
| G44.51 | Hemicrania continua | Can lead a claim | A | None |
| G44.52 | New daily persistent headache (NDPH) | Can lead a claim | A | None |
| G44.53 | Primary thunderclap headache | Can lead a claim | A | None |
| G44.59 | Other complicated headache syndrome | Can lead a claim | A | None |
| G44.8 Other specified headache syndromes | ||||
| G44.81 | Hypnic headache | Can lead a claim | A | None |
| G44.82 | Headache associated with sexual activity | Can lead a claim | A | None |
| G44.83 | Primary cough headache | Can lead a claim | A | None |
| G44.84 | Primary exertional headache | Can lead a claim | A | None |
| G44.85 | Primary stabbing headache | Can lead a claim | A | None |
| G44.86 | Cervicogenic headache | Can lead a claim | E | None |
| G44.89 | Other headache syndrome | Can lead a claim | A | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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