Mononeuropathy in diseases classified elsewhere (G59)
The ICD-10 code G59 is used specifically to identify cases of mononeuropathy occurring in the context of other diseases. This code helps healthcare providers distinguish nerve damage linked directly to underlying conditions rather than standalone nerve disorders.
Mononeuropathy refers to the damage or dysfunction of a single nerve. When this nerve problem happens as a result of other diseases; such as arteriosclerotic occlusive disease or thromboangiitis obliterans, often called by their synonyms neuropathy in arteriosclerotic occlusive disease or neuropathy in thromboangiitis obliterans; the ICD-10 code G59 is assigned. This code belongs to the group of nerve and nerve root disorders, and it allows medical coders and clinicians to capture nerve damage tied to systemic vascular conditions, ensuring precise documentation and appropriate treatment planning.
Diseases of the nervous system (G00–G99)
Nerve, nerve root and plexus disorders (G50-G59)
- G59 Mononeuropathy in diseases classified elsewhere
Mononeuropathy in diseases classified elsewhere (G59)
Instructional Notations
Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
- underlying disease
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
