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13. CRANIAL NEURALGIAS AND CENTRAL CAUSES OF FACIAL PAIN 13.1. Trigeminal neuralgia 13.2. Glossopharyngeal neuralgia 13.3. Nervus intermedius neuralgia [G51.80] 13.4. Superior laryngeal neuralgia [G52.20] 13.5. Nasociliary neuralgia [G52.80] 13.6. Supraorbital neuralgia [G52.80] 13.7. Other terminal branch neuralgias [G52.80] 13.8. Occipital neuralgia [G52.80] 13.9. Neck-tongue syndrome 13.10. External compression headache 13.11. Cold-stimulus headache 13.12. Constant pain caused by compression, irritation or distortion of cranial nerves or upper cervical roots by structural lesions [G53.8] + [code to specify aetiology] 13.13. Optic neuritis [H46]  13.14. Ocular diabetic neuropathy [E10-E14]  13.15. Head or facial pain attributed to herpes zoster 13.16. Tolosa-Hunt syndrome 13.17. Ophthalmoplegic “migraine” 13.18. Central causes of facial pain 13.19. Other cranial neuralgia or other centrally-mediated facial pain [code to specify aetiology] Bibliography and reference14. OTHER HEADACHE, CRANIAL NEURALGIA, CENTRAL OR PRIMARY FACIAL PAIN 

IHS	Diagnosis	ICD-10
13.13	Optic neuritis [H46]	G44.848

Description:

Pain behind one or both eyes accompanied by impairment of central vision caused by demyelination of the optic nerve.

Diagnostic criteria:

Dull pain behind one or both eyes, worsened by eye movement and fulfilling criteria C and D
Visual impairment due to a central or paracentral scotoma
Onset of pain and onset of visual impairment separated by <4 weeks¹
Pain resolves within 4 weeks
A compressive lesion has been ruled out

Note:

Pain precedes impairment of vision by <4 weeks. During this time, criterion B is not fulfilled and the diagnosis is Probable optic neuritis.

Comments:

Vision usually improves within 4 weeks.

Optic neuritis is often a manifestation of multiple sclerosis.

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IHS vs. ICD-10

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