---
title: "ICD-10-CM G44.59: Other complicated headache syndrome | BillingBrief"
description: "ICD-10-CM code G44.59: Other complicated headache syndrome. Category, related codes, and the official source, in plain English."
canonical: "https://billingbrief.com/icd10/g44.59/"
language: "en"
---

# G44.59 Other complicated headache syndrome

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

**Official ICD-10-CM description:** Other complicated headache syndrome

## 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

-   [`G44.41` 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/)
-   [`G44.52` New daily persistent headache (NDPH) ICD-10-CM](https://billingbrief.com/icd10/g44.52/)
-   [`G44.53` Primary thunderclap headache ICD-10-CM](https://billingbrief.com/icd10/g44.53/)
-   [`G44.81` Hypnic headache ICD-10-CM](https://billingbrief.com/icd10/g44.81/)
-   [`G44.82` Headache associated with sexual activity ICD-10-CM](https://billingbrief.com/icd10/g44.82/)
-   [`G44.83` Primary cough headache ICD-10-CM](https://billingbrief.com/icd10/g44.83/)
-   [`G44.84` Primary exertional headache ICD-10-CM](https://billingbrief.com/icd10/g44.84/)

## Common questions

### Is G44.59 a billable code?

Yes. G44.59 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/).