G44.099 – Other trigeminal autonomic cephalgias (TAC), not intractable

ICD-10-CM 2027 diagnosis code · Episodic and paroxysmal disorders

Billable code

ICD-10-CM code G44.099

Code: G44.099 (claims format: G44099)
Description: Other trigeminal autonomic cephalgias (TAC), not intractable
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 6. Diseases of the nervous system (G00-G99)
Block: G40-G47 Episodic and paroxysmal disorders
Parent codes: G44 › G44.0 › G44.09

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

G44 – Other headache syndromes

Excludes1 (not coded here):

headache NOS (R51.9)

Excludes2 (not included here):

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

Index terms for G44.099

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in G44.09

G44.091 – Other trigeminal autonomic cephalgias (TAC), intractableBillable

Frequently asked questions

What is ICD-10 code G44.099?

G44.099 is the ICD-10-CM code for other trigeminal autonomic cephalgias (TAC), not intractable, in the block G40-G47 (Episodic and paroxysmal disorders).

Is G44.099 a billable code?

Yes. G44.099 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does G44.099 belong to?

It belongs to category G44 – Other headache syndromes.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.