Home Introduction Prefaces Introduction to the classification How to Use This Classification Subcommittees and working groups The Classification Table of contents Part I: The primary headaches Part II: The secondary headaches Part III: Cranial neuralgias, facial pain and other headaches Appendix Definition of Terms

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5. HEADACHE ATTRIBUTED TO HEAD AND/OR NECK TRAUMA 6. HEADACHE ATTRIBUTED TO CRANIAL OR CERVICAL VASCULAR DISORDER 7. HEADACHE ATTRIBUTED TO NON-VASCULAR INTRACRANIAL DISORDER 8. HEADACHE ATTRIBUTED TO A SUBSTANCE OR ITS WITHDRAWAL 9. HEADACHE ATTRIBUTED TO INFECTION 10. HEADACHE ATTRIBUTED TO DISORDER OF HOMOEOSTASIS 10.1. Headache attributed to hypoxia and/or hypercapnia 10.2. Dialysis headache [Y84.1] 10.3. Headache attributed to arterial hypertension [I10] 10.3.1. Headache attributed to phaeochromocytoma [D53.0 (benign) or C74.1 (malignant)] 10.3.2. Headache attributed to hypertensive crisis without hypertensive encephalopathy [I10] 10.3.3. Headache attributed to hypertensive encephalopathy [I67.4] 10.3.4. Headache attributed to pre-eclampsia [O13-O14] 10.3.5. Headache attributed to eclampsia [O15] 10.3.6. Headache attributed to acute pressor response to an exogenous agent [code to specify aetiology] 10.4. Headache attributed to hypothyroidism [E03.9] 10.5. Headache attributed to fasting [T73.0] 10.6. Cardiac cephalalgia [code to specify aetiology] 10.7. Headache attributed to other disorder of homoeostasis [code to specify aetiology] Bibliography11. HEADACHE OR FACIAL PAIN ATTRIBUTED TO DISORDER OF CRANIUM, NECK, EYES, EARS, NOSE, SINUSES, TEETH, MOUTH OR OTHER FACIAL OR CRANIAL STRUCTURES 12. HEADACHE ATTRIBUTED TO PSYCHIATRIC DISORDER 

IHS	Diagnosis	ICD-10
10.3	Headache attributed to arterial hypertension [I10]	G44.813

Comment:

Mild (140-159/90-99 mm Hg) or moderate (160-179/100-109 mm Hg) chronic arterial hypertension does not appear to cause headache. Whether moderate hypertension predisposes to headache at all remains controversial, but there is little evidence that it does. Ambulatory blood pressure monitoring in patients with mild and moderate hypertension has shown no convincing relationship between blood pressure fluctuations over a 24-hour period and presence or absence of headache.

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IHS vs. ICD-10

To facilitate headache diagnosis in daily practice, the classification provides the corresponding WHO ICD-10NA codes for each IHS code.

IHS Subcommittee

The Classification Subcommittee prepares and revises the International Classification of Headache Disorders.

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