ICD-10-CM Code G44

Other headache syndromes

Version 2020 Non-Billable Code

Not Valid for Submission

G44 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of other headache syndromes. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

Short Description:Other headache syndromes
Long Description:Other headache syndromes

Consider the following ICD-10 codes with a higher level of specificity:

  • G44.0 - Cluster headaches and other trigeminal autonomic cephalgias (TAC)
  • G44.00 - Cluster headache syndrome, unspecified
  • G44.001 - Cluster headache syndrome, unspecified, intractable
  • G44.009 - Cluster headache syndrome, unspecified, not intractable
  • G44.01 - Episodic cluster headache
  • G44.011 - Episodic cluster headache, intractable
  • G44.019 - Episodic cluster headache, not intractable
  • G44.02 - Chronic cluster headache
  • G44.021 - Chronic cluster headache, intractable
  • G44.029 - Chronic cluster headache, not intractable
  • G44.03 - Episodic paroxysmal hemicrania
  • G44.031 - Episodic paroxysmal hemicrania, intractable
  • G44.039 - Episodic paroxysmal hemicrania, not intractable
  • G44.04 - Chronic paroxysmal hemicrania
  • G44.041 - Chronic paroxysmal hemicrania, intractable
  • G44.049 - Chronic paroxysmal hemicrania, not intractable
  • 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), intractable
  • G44.059 - Short lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT), not intractable
  • G44.09 - Other trigeminal autonomic cephalgias (TAC)
  • G44.091 - Other trigeminal autonomic cephalgias (TAC), intractable
  • G44.099 - Other trigeminal autonomic cephalgias (TAC), not intractable
  • G44.1 - Vascular headache, not elsewhere classified
  • G44.2 - Tension-type headache
  • G44.20 - Tension-type headache, unspecified
  • G44.201 - Tension-type headache, unspecified, intractable
  • G44.209 - Tension-type headache, unspecified, not intractable
  • G44.21 - Episodic tension-type headache
  • G44.211 - Episodic tension-type headache, intractable
  • G44.219 - Episodic tension-type headache, not intractable
  • G44.22 - Chronic tension-type headache
  • G44.221 - Chronic tension-type headache, intractable
  • G44.229 - Chronic tension-type headache, not intractable
  • G44.3 - Post-traumatic headache
  • G44.30 - Post-traumatic headache, unspecified
  • G44.301 - Post-traumatic headache, unspecified, intractable
  • G44.309 - Post-traumatic headache, unspecified, not intractable
  • G44.31 - Acute post-traumatic headache
  • G44.311 - Acute post-traumatic headache, intractable
  • G44.319 - Acute post-traumatic headache, not intractable
  • G44.32 - Chronic post-traumatic headache
  • G44.321 - Chronic post-traumatic headache, intractable
  • G44.329 - Chronic post-traumatic headache, not intractable
  • G44.4 - Drug-induced headache, not elsewhere classified
  • G44.40 - Drug-induced headache, not elsewhere classified, not intractable
  • G44.41 - Drug-induced headache, not elsewhere classified, intractable
  • G44.5 - Complicated headache syndromes
  • G44.51 - Hemicrania continua
  • G44.52 - New daily persistent headache (NDPH)
  • G44.53 - Primary thunderclap headache
  • G44.59 - Other complicated headache syndrome
  • G44.8 - Other specified headache syndromes
  • G44.81 - Hypnic headache
  • G44.82 - Headache associated with sexual activity
  • G44.83 - Primary cough headache
  • G44.84 - Primary exertional headache
  • G44.85 - Primary stabbing headache
  • G44.89 - Other headache syndrome

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code G44:

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • headache NOS R51

Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • atypical facial pain G50.1
  • headache due to lumbar puncture G97.1
  • migraines G43
  • trigeminal neuralgia G50.0

Clinical Information

  • CLUSTER HEADACHE-. a primary headache disorder that is characterized by severe strictly unilateral pain which is orbital supraorbital temporal or in any combination of these sites lasting 15 180 min. occurring 1 to 8 times a day. the attacks are associated with one or more of the following all of which are ipsilateral: conjunctival injection lacrimation nasal congestion rhinorrhea facial sweating eyelid edema and miosis. international classification of headache disorders 2nd ed. cephalalgia 2004: suppl 1
  • HEADACHE DISORDERS-. various conditions with the symptom of headache. headache disorders are classified into major groups such as primary headache disorders based on characteristics of their headache symptoms and secondary headache disorders based on their etiologies. international classification of headache disorders 2nd ed. cephalalgia 2004: suppl 1
  • HEADACHE DISORDERS PRIMARY-. conditions in which the primary symptom is headache and the headache cannot be attributed to any known causes.

Code Classification

  • Diseases of the nervous system (G00–G99)
    • Episodic and paroxysmal disorders (G40-G47)
      • Other headache syndromes (G44)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Almost everyone has had a headache. Headache is the most common form of pain. It's a major reason people miss days at work or school or visit the doctor.

The most common type of headache is a tension headache. Tension headaches are due to tight muscles in your shoulders, neck, scalp and jaw. They are often related to stress, depression or anxiety. You are more likely to get tension headaches if you work too much, don't get enough sleep, miss meals, or use alcohol.

Other common types of headaches include migraines, cluster headaches, and sinus headaches. Most people can feel much better by making lifestyle changes, learning ways to relax and taking pain relievers.

Not all headaches require a doctor's attention. But sometimes headaches warn of a more serious disorder. Let your health care provider know if you have sudden, severe headaches. Get medical help right away if you have a headache after a blow to your head, or if you have a headache along with a stiff neck, fever, confusion, loss of consciousness, or pain in the eye or ear.

NIH: National Institute of Neurological Disorders and Stroke

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