G44.8 – Other specified headache syndromes
ICD-10-CM 2027 diagnosis code · Episodic and paroxysmal disorders
ICD-10-CM code
G44.8
- Code
G44.8(claims format:G448)- Description
- Other specified 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
- Parent codes
- G44
Billable codes under G44.8
G44.8 is a header code and cannot be used on claims. Choose the most specific code:
- G44.81 – Hypnic headacheBillable
- G44.82 – Headache associated with sexual activityBillable
- G44.83 – Primary cough headacheBillable
- G44.84 – Primary exertional headacheBillable
- G44.85 – Primary stabbing headacheBillable
- G44.86 – Cervicogenic headacheBillable
- G44.89 – Other headache syndromeBillable
Notes for G44.8
Excludes2 (not included here):
- headache with orthostatic or positional component, not elsewhere classified (R51.0)
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)
Related codes in G44
- G44.0 – Cluster headaches and other trigeminal autonomic cephalgias (TAC)Header
- G44.1 – Vascular headache, not elsewhere classifiedBillable
- G44.2 – Tension-type headacheHeader
- G44.3 – Post-traumatic headacheHeader
- G44.4 – Drug-induced headache, not elsewhere classifiedHeader
- G44.5 – Complicated headache syndromesHeader
Frequently asked questions
What is ICD-10 code G44.8?
G44.8 is the ICD-10-CM code for other specified headache syndromes, in the block G40-G47 (Episodic and paroxysmal disorders).
Is G44.8 a billable code?
No. G44.8 is a header code with more specific child codes; report one of the billable codes listed above.
What category does G44.8 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.