| IHS | Diagnosis | ICD-10 |
|---|---|---|
| 7.1.2 | Headache attributed to intracranial hypertension secondary to metabolic, toxic or hormonal causes | G44.820 |
| Coded elsewhere | Headache attributed to increased intracranial pressure due to head trauma, vascular disorder or intracranial infection is coded to whichever one of those disorders is present. Headache attributed to raised intracranial pressure occurring as a side-effect of medication is coded as 8.3 Headache as an adverse event attributed to chronic medication. | |
Diagnostic criteria:
- Headache with at least one of the following characteristics and fulfilling criteria C and D:
- daily occurrence
- diffuse and/or constant (non-pulsating) pain
- aggravated by coughing or straining
- Intracranial hypertension fulfilling the following criteria:
- alert patient with neurological examination that either is normal or demonstrates any of the following abnormalities:
- papilloedema
- enlarged blind spot
- visual field defect (progressive if untreated)
- sixth nerve palsy
- increased CSF pressure (>200 mm H2O in the non-obese, >250 mm H2O in the obese) measured by lumbar puncture in the recumbent position or by epidural or intraventricular pressure monitoring
- normal CSF chemistry (low CSF protein is acceptable) and cellularity
- intracranial diseases (including venous sinus thrombosis) ruled out by appropriate investigations
- alert patient with neurological examination that either is normal or demonstrates any of the following abnormalities:
- Headache develops after weeks or months of endocrine disorder, hypervitaminosis A or intake of substances (other than medications) that can elevate CSF pressure
- Headache resolves within 3 months after removal of the cause
Comments:
Normal pressure hydrocephalus does not cause headache.
