G44 — Other headache syndromes
Is G44 billable?
No — G44 is a non-billable header code. G44 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 40 billable codes beneath G44.
Billable codes under this header
- G44.1Vascular headache, not elsewhere classified
- G44.40Drug-induced headache, not elsewhere classified, not intractable
- G44.41Drug-induced headache, not elsewhere classified, intractable
- G44.51Hemicrania continua
- G44.52New daily persistent headache (NDPH)
- G44.53Primary thunderclap headache
- G44.59Other complicated headache syndrome
- G44.81Hypnic headache
- G44.82Headache associated with sexual activity
- G44.83Primary cough headache
- G44.84Primary exertional headache
- G44.85Primary stabbing headache
- G44.86Cervicogenic headache
- G44.89Other headache syndrome
- G44.001Cluster headache syndrome, unspecified, intractable
- G44.009Cluster headache syndrome, unspecified, not intractable
- G44.011Episodic cluster headache, intractable
- G44.019Episodic cluster headache, not intractable
- G44.021Chronic cluster headache, intractable
- G44.029Chronic cluster headache, not intractable
- G44.031Episodic paroxysmal hemicrania, intractable
- G44.039Episodic paroxysmal hemicrania, not intractable
- G44.041Chronic paroxysmal hemicrania, intractable
- G44.049Chronic paroxysmal hemicrania, not intractable
- G44.051Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), intractable
- G44.059Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable
- G44.091Other trigeminal autonomic cephalgias (TAC), intractable
- G44.099Other trigeminal autonomic cephalgias (TAC), not intractable
- G44.201Tension-type headache, unspecified, intractable
- G44.209Tension-type headache, unspecified, not intractable
- G44.211Episodic tension-type headache, intractable
- G44.219Episodic tension-type headache, not intractable
- G44.221Chronic tension-type headache, intractable
- G44.229Chronic tension-type headache, not intractable
- G44.301Post-traumatic headache, unspecified, intractable
- G44.309Post-traumatic headache, unspecified, not intractable
- G44.311Acute post-traumatic headache, intractable
- G44.319Acute post-traumatic headache, not intractable
- G44.321Chronic post-traumatic headache, intractable
- G44.329Chronic post-traumatic headache, not intractable
G44 at a glance
| Code | G44 |
|---|---|
| Description | Other headache syndromes |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with G44 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- headache NOS (R51.9)
Excludes2 — not included here
The conditions below are not part of G44, but a patient may have both at the same time. When documentation supports it, G44 and the excluded code may both be reported.
Excludes2 — not included here — inherited from Chapter 6
The conditions below are not part of G44, but a patient may have both at the same time. When documentation supports it, G44 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
What codes fall under G44? (7)
- G44.0Cluster headaches and other trigeminal autonomic cephalgias (TAC)not billable
- G44.1Vascular headache, not elsewhere classified
- G44.2Tension-type headachenot billable
- G44.3Post-traumatic headachenot billable
- G44.4Drug-induced headache, not elsewhere classifiednot billable
- G44.5Complicated headache syndromesnot billable
- G44.8Other specified headache syndromesnot billable
How long has G44 existed?
G44 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with G44?
ICD-10-CM declares these codes mutually exclusive with G44 — exactly one of each pair can be correct for a given encounter.