U.S. ICD-10-CM · FY 2027

G44 ICD-10-CM Code: Other headache syndromes

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

G44

Other headache syndromes

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where G44 sits

  1. 1

    Chapter 6

    Diseases of the nervous system (G00-G99)

  2. 2

    Section

    Episodic and paroxysmal disorders (G40-G47)

  3. 3

    Category G44

    Other headache syndromes

  4. 4

    Code G44

    Other headache syndromes

More specific choices

Codes under G44

G44 is a non-billable category. Choose the child code that best matches the documented diagnosis.

G44.0

Cluster headaches and other trigeminal autonomic cephalgias (TAC)

G44.1

Vascular headache, not elsewhere classified

G44.2

Tension-type headache

G44.3

Post-traumatic headache

G44.4

Drug-induced headache, not elsewhere classified

G44.5

Complicated headache syndromes

G44.8

Other specified headache syndromes

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for G44.

Code first

No “code first” instruction is listed for G44.

Use additional code

No “use additional code” instruction is listed for G44.

Excludes1

Conditions that should not be reported together with this code.

  • headache NOS (R51.9)

Excludes2

Conditions not included here that may be reported separately when present.

  • atypical facial pain (G50.1)
  • headache due to lumbar puncture (G97.1)
  • migraines (G43.-)
  • trigeminal neuralgia (G50.0)

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code G44 mean?

G44 is the FY 2027 U.S. ICD-10-CM code for “Other headache syndromes.”

Is G44 a billable or specific ICD-10-CM code?

No. G44 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is G44 located in ICD-10-CM?

G44 is listed in Chapter 6, Diseases of the nervous system (G00-G99), within Episodic and paroxysmal disorders (G40-G47) (G40–G47), under category G44, Other headache syndromes.

What coding notes are listed for G44?

No inclusion terms are listed for G44 in this reference record. No code-first instruction is listed. Excludes1 notes: headache NOS (R51.9). Excludes2 notes: atypical facial pain (G50.1); headache due to lumbar puncture (G97.1); migraines (G43.-); trigeminal neuralgia (G50.0).

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