G44 – Other headache syndromes
ICD-10-CM 2027 diagnosis code · Episodic and paroxysmal disorders
ICD-10-CM code
G44
- Code
G44(claims format:G44)- Description
- Other headache syndromes
- Billable
- No – use a more specific code below
- 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
Billable codes under G44
G44 is a header code and cannot be used on claims. Choose the most specific code:
- G44.0 – Cluster headaches and other trigeminal autonomic cephalgias (TAC)Header (more codes below)
- G44.1 – Vascular headache, not elsewhere classifiedBillable
- G44.2 – Tension-type headacheHeader (more codes below)
- G44.3 – Post-traumatic headacheHeader (more codes below)
- G44.4 – Drug-induced headache, not elsewhere classifiedHeader (more codes below)
- G44.5 – Complicated headache syndromesHeader (more codes below)
- G44.8 – Other specified headache syndromesHeader (more codes below)
Notes for G44
Excludes1 (not coded here):
- headache NOS (R51.9)
Frequently asked questions
What is ICD-10 code G44?
G44 is the ICD-10-CM code for other headache syndromes, in the block G40-G47 (Episodic and paroxysmal disorders).
Is G44 a billable code?
No. G44 is a header code with more specific child codes; report one of the billable codes listed above.
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.