Other headache syndromes (G44)

• Diseases of the nervous system (G00–G99)

  • Episodic and paroxysmal disorders (G40-G47)

    • Other headache syndromes (G44)

      • G44 Other headache syndromes

      • 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
      • G44.86 Cervicogenic headache
      • G44.89 Other headache syndrome

Instructional Notations

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 R51.9

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 Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.