ICD-10-CM 2027
ICD-10 code for neuronitis
From the official ICD-10-CM alphabetic index entry “Neuronitis”. Page updated September 29, 2026.
About coding neuronitis
The ICD-10-CM code for neuronitis is G58.9 (Mononeuropathy, unspecified). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on G58.9.
Within G58, choose G58.9 (Mononeuropathy, unspecified) only when documentation doesn't support a more specific option: intercostal neuropathy (G58.0), mononeuritis multiplex (G58.7) and other specified mononeuropathies (G58.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 073 (Cranial and Peripheral Nerve Disorders with MCC, relative weight 1.5779) and DRG 074 (Cranial and Peripheral Nerve Disorders without MCC, relative weight 1.0173), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific neuronitis codes (official index)
Common questions about neuronitis ICD-10 codes
What is the ICD-10 code for neuronitis?
- G58.9 — Mononeuropathy, unspecified. More specific codes apply when the documentation supports them: G57.2, H81.2.
What is the ICD-10 code for ascending neuronitis?
- G57.2 — Lesion of femoral nerve (header code; choose a more specific subcode).
What is the ICD-10 code for vestibular neuronitis?
- H81.2 — Vestibular neuronitis (header code; choose a more specific subcode).
Is G58.9 billable?
- Yes. G58.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G58.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G58.9 as a principal diagnosis.
Is G58.9 a CC or MCC?
- No. G58.9 is neither a CC nor an MCC under MS-DRG v44.0.