Disorders of trigeminal nerve (G50)
The ICD-10 code section G50 covers various disorders of the trigeminal nerve, a major nerve responsible for sensation and motor function in the face. This section is used to classify conditions like trigeminal neuralgia, atypical facial pain, and other specific or unspecified trigeminal nerve disorders.
The ICD-10 code for trigeminal neuralgia (G50.0) includes conditions commonly described as fifth cranial nerve pain, idiopathic or secondary trigeminal neuralgia, and related terms such as left or right trigeminal neuralgia. These codes help identify severe facial pain originating from the trigeminal nerve. Code G50.1 is designated for atypical facial pain that cannot be classified as typical neuralgia. Code G50.8 covers a variety of other trigeminal nerve disorders, including conditions like trigeminal nerve palsy, mandibular nerve disorders, and gustatory sweating (gustatory hyperhidrosis). When the specific disorder is not clear, G50.9 is used for unspecified trigeminal nerve disorders, which can also relate to terms such as trigeminal trophic syndrome and abnormal nerve function. Understanding these synonyms is crucial for medical coders seeking the correct ICD-10 code for trigeminal nerve-related conditions.
Instructional Notations
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- disorders of 5th cranial nerve
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
Trigeminal Neuralgia
A syndrome characterized by recurrent episodes of excruciating pain lasting several seconds or longer in the sensory distribution of the TRIGEMINAL NERVE. Pain may be initiated by stimulation of trigger points on the face, lips, or gums or by movement of facial muscles or chewing. Associated conditions include MULTIPLE SCLEROSIS, vascular anomalies, ANEURYSMS, and neoplasms. (Adams et al., Principles of Neurology, 6th ed, p187)
