Migraine G43-

  • the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled
Use Additional
Use Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • code for adverse effect, if applicable, to identify drug (T36-T50
    ICD-10-CM Range T36-T50

    Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances

    Code First
    • , for adverse effects, the nature of the adverse effect, such as:
    • adverse effect NOS (T88.7)
    • aspirin gastritis (K29.-)
    • blood disorders (D56-D76)
    • contact dermatitis (L23-L25)
    • dermatitis due to substances taken internally (L27.-)
    • nephropathy (N14.0-N14.2)
    • adverse effect of correct substance properly administered
    • poisoning by overdose of substance
    • poisoning by wrong substance given or taken in error
    • underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed
    • The drug giving rise to the adverse effect should be identified by use of codes from categories T36-T50 with fifth or sixth character 5.
    Type 1 Excludes
    • toxic reaction to local anesthesia in pregnancy (O29.3-)
    Type 2 Excludes
    • abuse and dependence of psychoactive substances (F10-F19)
    • abuse of non-dependence-producing substances (F55.-)
    • immunodeficiency due to drugs (D84.821)
    • drug reaction and poisoning affecting newborn (P00-P96)
    • pathological drug intoxication (inebriation) (F10-F19)
    Use Additional
    • code(s) to specify:
    • manifestations of poisoning
    • underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
    • underdosing of medication regimen (Z91.12-, Z91.13-)
    • T36 Poisoning by, adverse effect of and unde...
    • T37 Poisoning by, adverse effect of and unde...
    • T38 Poisoning by, adverse effect of and unde...
    • T39 Poisoning by, adverse effect of and unde...
    • T40 Poisoning by, adverse effect of and unde...
    • T41 Poisoning by, adverse effect of and unde...
    • T42 Poisoning by, adverse effect of and unde...
    • T43 Poisoning by, adverse effect of and unde...
    • T44 Poisoning by, adverse effect of and unde...
    • T45 Poisoning by, adverse effect of and unde...
    • T46 Poisoning by, adverse effect of and unde...
    • T47 Poisoning by, adverse effect of and unde...
    • T48 Poisoning by, adverse effect of and unde...
    • T49 Poisoning by, adverse effect of and unde...
    • T50 Poisoning by, adverse effect of and unde...
    with fifth or sixth character 5)
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as G43. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • headache NOS (
    ICD-10-CM Diagnosis Code R51.9

    Headache, unspecified

      2021 - New Code 2022 2023 Billable/Specific Code
    Applicable To
    • Facial pain NOS
  • lower half migraine (
    ICD-10-CM Diagnosis Code G44.00

    Cluster headache syndrome, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Applicable To
    • Ciliary neuralgia
    • Cluster headache NOS
    • Histamine cephalgia
    • Lower half migraine
    • Migrainous neuralgia
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (G43) and the excluded code together.
  • headache syndromes (
    ICD-10-CM Diagnosis Code G44
    • G44 Other headache syndromes
      • G44.0 Cluster headaches and other trigeminal autono...
        • G44.00 Cluster headache syndrome, unspecified
          • G44.001 Cluster headache syndrome, unspecified, intra...
          • G44.009 Cluster headache syndrome, unspecified, not i...
        • G44.01 Episodic cluster headache
        • G44.02 Chronic cluster headache
        • G44.03 Episodic paroxysmal hemicrania
          • G44.031 …… intractable
          • G44.039 Episodic paroxysmal hemicrania, not intractab...
        • G44.04 Chronic paroxysmal hemicrania
          • G44.041 …… intractable
          • G44.049 Chronic paroxysmal hemicrania, not intractabl...
        • G44.05 Short lasting unilateral neuralgiform headach...
          • G44.051 Short lasting unilateral neuralgiform headach...
          • G44.059 Short lasting unilateral neuralgiform headach...
        • G44.09 Other trigeminal autonomic cephalgias (TAC)
          • G44.091 Other trigeminal autonomic cephalgias (TAC), ...
          • G44.099 Other trigeminal autonomic cephalgias (TAC), ...
      • G44.1 Vascular headache, not elsewhere classified
      • G44.2 Tension-type headache
        • G44.20 Tension-type headache, unspecified
          • G44.201 Tension-type headache, unspecified, intractab...
          • G44.209 Tension-type headache, unspecified, not intra...
        • G44.21 Episodic tension-type headache
          • G44.211 …… intractable
          • G44.219 Episodic tension-type headache, not intractab...
        • G44.22 Chronic tension-type headache
          • G44.221 …… intractable
          • G44.229 Chronic tension-type headache, not intractabl...
      • G44.3 Post-traumatic headache
        • G44.30 Post-traumatic headache, unspecified
          • G44.301 Post-traumatic headache, unspecified, intract...
          • G44.309 Post-traumatic headache, unspecified, not int...
        • G44.31 Acute post-traumatic headache
          • G44.311 …… intractable
          • G44.319 Acute post-traumatic headache, not intractabl...
        • G44.32 Chronic post-traumatic headache
          • G44.321 …… intractable
          • G44.329 Chronic post-traumatic headache, not intracta...
      • G44.4 Drug-induced headache, not elsewhere classifi...
        • G44.40 Drug-induced headache, not elsewhere classifi...
        • G44.41 Drug-induced headache, not elsewhere classifi...
      • 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
Clinical Information
  • A class of disabling primary headache disorders, characterized by recurrent unilateral pulsatile headaches. The two major subtypes are common migraine (without aura) and classic migraine (with aura or neurological symptoms). (international classification of headache disorders, 2nd ed. Cephalalgia 2004: suppl 1)
  • A common, severe type of vascular headache often associated with increased sympathetic activity, resulting in nausea, vomiting, and light sensitivity.
  • If you suffer from migraine headaches, you're not alone. About 12 percent of the United States Population gets them. Migraines are recurring attacks of moderate to severe pain. The pain is throbbing or pulsing, and is often on one side of the head. During migraines, people are very sensitive to light and sound. They may also become nauseated and vomit. Migraine is three times more common in women than in men. Some people can tell when they are about to have a migraine because they see flashing lights or zigzag lines or they temporarily lose their vision. Many things can trigger a migraine. These include
    • anxiety
    • stress
    • lack of food or sleep
    • exposure to light
    • hormonal changes (in women)
    doctors used to believe migraines were linked to the opening and narrowing of blood vessels in the head. Now they believe the cause is related to genes that control the activity of some brain cells. Medicines can help prevent migraine attacks or help relieve symptoms of attacks when they happen. For many people, treatments to relieve stress can also help.
  • Neural condition characterized by a severe recurrent vascular headache, usually on one side of the head, often accompanied by nausea, vomiting, and photophobia, sometimes preceded by sensory disturbances; triggers include allergic reactions, excess carbohydrates or iodine in the diet, alcohol, bright lights or loud noises.
  • G43 Migraine
    • G43.0 Migraine without aura
      • G43.00 Migraine without aura, not intractable
        • G43.001 …… with status migrainosus
        • G43.009 …… without status migrainosus
      • G43.01 Migraine without aura, intractable
        • G43.011 …… with status migrainosus
        • G43.019 …… without status migrainosus
    • G43.1 Migraine with aura
      • G43.10 Migraine with aura, not intractable
        • G43.101 …… with status migrainosus
        • G43.109 …… without status migrainosus
      • G43.11 Migraine with aura, intractable
        • G43.111 …… with status migrainosus
        • G43.119 …… without status migrainosus
    • G43.4 Hemiplegic migraine
      • G43.40 Hemiplegic migraine, not intractable
        • G43.401 …… with status migrainosus
        • G43.409 …… without status migrainosus
      • G43.41 Hemiplegic migraine, intractable
        • G43.411 …… with status migrainosus
        • G43.419 …… without status migrainosus
    • G43.5 Persistent migraine aura without cerebral infarction
      • G43.50 Persistent migraine aura without cerebral infarction, not intractable
        • G43.501 …… with status migrainosus
        • G43.509 …… without status migrainosus
      • G43.51 Persistent migraine aura without cerebral infarction, intractable
        • G43.511 …… with status migrainosus
        • G43.519 …… without status migrainosus
    • G43.6 Persistent migraine aura with cerebral infarction
      • G43.60 Persistent migraine aura with cerebral infarction, not intractable
        • G43.601 …… with status migrainosus
        • G43.609 …… without status migrainosus
      • G43.61 Persistent migraine aura with cerebral infarction, intractable
        • G43.611 …… with status migrainosus
        • G43.619 …… without status migrainosus
    • G43.7 Chronic migraine without aura
      • G43.70 Chronic migraine without aura, not intractable
        • G43.701 …… with status migrainosus
        • G43.709 …… without status migrainosus
      • G43.71 Chronic migraine without aura, intractable
        • G43.711 …… with status migrainosus
        • G43.719 …… without status migrainosus
    • G43.A Cyclical vomiting
      • G43.A0 …… in migraine, not intractable
      • G43.A1 …… in migraine, intractable
    • G43.B Ophthalmoplegic migraine
    • G43.C Periodic headache syndromes in child or adult
    • G43.D Abdominal migraine
    • G43.8 Other migraine
      • G43.80 Other migraine, not intractable
        • G43.801 …… with status migrainosus
        • G43.809 …… without status migrainosus
      • G43.81 Other migraine, intractable
        • G43.811 …… with status migrainosus
        • G43.819 …… without status migrainosus
      • G43.82 Menstrual migraine, not intractable
        • G43.821 …… with status migrainosus
        • G43.829 …… without status migrainosus
      • G43.83 Menstrual migraine, intractable
        • G43.831 …… with status migrainosus
        • G43.839 …… without status migrainosus
    • G43.9 Migraine, unspecified
      • G43.90 Migraine, unspecified, not intractable
        • G43.901 …… with status migrainosus
        • G43.909 …… without status migrainosus
      • G43.91 Migraine, unspecified, intractable
        • G43.911 …… with status migrainosus
        • G43.919 …… without status migrainosus