---
title: "ICD-10-CM G44.321: Chronic post-traumatic headache… | BillingBrief"
description: "ICD-10-CM code G44.321: Chronic post-traumatic headache, intractable. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/g44.321/"
language: "en"
---

# G44.321 Chronic post-traumatic headache, intractable

ICD-10-CM · [CMS code reference](#source)

**Official ICD-10-CM description:** Chronic post-traumatic headache, intractable

## Coding notes

From the ICD-10-CM FY2027 (effective October 1, 2026) tabular list. Notes on a parent code or category apply here too.

### Excludes1

Not coded together with this code. The exception is when the two conditions are unrelated to each other.

-   headache NOS ([R51.9](https://billingbrief.com/icd10/r51.9/))

### Excludes2

Not part of this code, but both can be coded when both are documented.

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

## Related codes

-   [`G44.301` Post-traumatic headache, unspecified, intractable ICD-10-CM](https://billingbrief.com/icd10/g44.301/)
-   [`G44.309` Post-traumatic headache, unspecified, not intractable ICD-10-CM](https://billingbrief.com/icd10/g44.309/)
-   [`G44.311` Acute post-traumatic headache, intractable ICD-10-CM](https://billingbrief.com/icd10/g44.311/)
-   [`G44.319` Acute post-traumatic headache, not intractable ICD-10-CM](https://billingbrief.com/icd10/g44.319/)
-   [`G44.329` Chronic post-traumatic headache, not intractable ICD-10-CM](https://billingbrief.com/icd10/g44.329/)
-   [`G44.40` Drug-induced headache, not elsewhere classified, not intractable ICD-10-CM](https://billingbrief.com/icd10/g44.40/)
-   [`G44.41` Drug-induced headache, not elsewhere classified, intractable ICD-10-CM](https://billingbrief.com/icd10/g44.41/)
-   [`G44.51` Hemicrania continua ICD-10-CM](https://billingbrief.com/icd10/g44.51/)

## Common questions

### Is G44.321 a billable code?

Yes. G44.321 is a billable ICD-10-CM code in the ICD-10-CM FY2027 (effective October 1, 2026) code set.

## From the source

Official description from [CMS](https://www.cms.gov/medicare/coding-billing/icd-10-codes).
ICD-10-CM FY2027 (effective October 1, 2026).

Code set

ICD-10-CM

Category

G44 Other headache syndromes

Chapter

Diseases of the nervous system

Billable

Yes

Educational reference only. Not medical, legal, or billing advice. Always check the current official code set and payer policy before you bill. [About BillingBrief and our sources](https://billingbrief.com/about/).