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ICD10BillableValid for clinical use

ICD-10 Code G44.321: Chronic post-traumatic headache, intractable

G44.321 is a billable ICD-10 diagnosis code used to classify Chronic post-traumatic headache, intractable in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

When is it used?

  • May be used when a clinician documents chronic post-traumatic headache, intractable in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
6Diseases of the nervous system (G00-G99)
block
G40-G47Episodic and paroxysmal disorders
category
G44Other headache syndromes
category
G44.3Post-traumatic headache
category
G44.32Chronic post-traumatic headache
currentG44.32

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

NeurologistGeneral PhysicianOrthopedic Specialist

Coverage-related procedures and services

CPT 70460high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITH CONTRAST MATERIAL(S)
Source: CMS coverage guidance
CPT 70450high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITHOUT CONTRAST MATERIAL
Source: CMS coverage guidance
CPT 70470high
COMPUTED TOMOGRAPHY, HEAD OR BRAIN; WITHOUT CONTRAST MATERIAL, FOLLOWED BY CONTRAST MATERIAL(S) AND FURTHER SECTIONS
Source: CMS coverage guidance
CPT 64597high
INSERTION OR REPLACEMENT OF PERCUTANEOUS ELECTRODE ARRAY, PERIPHERAL NERVE, WITH INTEGRATED NEUROSTIMULATOR, INCLUDING IMAGING GUIDANCE, WHEN PERFORMED; EACH ADDITIONAL ELECTRODE ARRAY (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 64596high
INSERTION OR REPLACEMENT OF PERCUTANEOUS ELECTRODE ARRAY, PERIPHERAL NERVE, WITH INTEGRATED NEUROSTIMULATOR, INCLUDING IMAGING GUIDANCE, WHEN PERFORMED; INITIAL ELECTRODE ARRAY
Source: CMS coverage guidance
CPT 64590high
INSERTION OR REPLACEMENT OF PERIPHERAL, SACRAL, OR GASTRIC NEUROSTIMULATOR PULSE GENERATOR OR RECEIVER, REQUIRING POCKET CREATION AND CONNECTION BETWEEN ELECTRODE ARRAY AND PULSE GENERATOR OR RECEIVER
Source: CMS coverage guidance

Coding guidelines

Common synonyms

Chronic post-traumatic headache, intractable

Frequently asked questions

Code details

CodeG44.321
SystemICD10
Display nameChronic post-traumatic headache, intractable
ChapterDiseases of the nervous system (G00-G99)
BlockEpisodic and paroxysmal disorders

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Headache

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.