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ICD-10-CM Current in FY 2027

G44.021

Chronic cluster headache, intractable

Release
FY 2027
Effective
Official source (opens in a new tab)

Hierarchy

Where G44.021 sits in the official hierarchy. Each level is the code it is classified under.

  1. G44 Other headache syndromes
  2. G44.0 Cluster headaches and other trigeminal autonomic cephalgias (TAC)
  3. G44.02 Parent Chronic cluster headache
  4. G44.021 This code Chronic cluster headache, intractable

Official Coding Notes

Reproduced verbatim from the FY 2027 ICD-10-CM files. Notes labelled as inherited are declared on a parent code and apply here too.

Excludes1

headache NOS ( R51.9 )

Inherited from G44 — Other headache syndromes

Excludes2

atypical facial pain ( G50.1 )

Inherited from G44 — Other headache syndromes

Excludes2

headache due to lumbar puncture ( G97.1 )

Inherited from G44 — Other headache syndromes

Excludes2

migraines ( G43 .-)

Inherited from G44 — Other headache syndromes

Excludes2

trigeminal neuralgia ( G50.0 )

Inherited from G44 — Other headache syndromes

Version History

How G44.021 appears in each release imported from the official files, newest first.

  1. FY 2027 Effective

    Current

    Chronic cluster headache, intractable

  2. FY 2026 Effective

    Unchanged

    Chronic cluster headache, intractable

Related Codes

Other codes under G44.02

Data Source

Code information on this page is derived from the FY 2027 ICD-10-CM files published by CDC NCHS and CMS.

Release
FY 2027
Effective
Source file
icd10cm-code-descriptions-2027.zip

Official ICD-10-CM source files (opens in a new tab)

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