Cranial nerve disorders in diseases classified elsewhere (G53)
The ICD-10 code G53 covers disorders affecting the cranial nerves that arise as complications of other underlying diseases, rather than primary nerve diseases. It specifically identifies nerve issues linked to infections, diabetes, or neoplastic conditions.
This section is used to code conditions like fungal or parasitic infections of cranial nerves, often referred to as fungal neuritis or infections caused by Mucorales. It also includes multiple cranial nerve palsies that occur secondary to cancers (neoplastic diseases). Additionally, neuropathies and palsies affecting cranial nerves caused by type 2 diabetes mellitus, sometimes called diabetic cranial nerve palsy, fall under G53. Using this code helps distinguish nerve disorders as complications of other illnesses, aiding coders and clinicians in accurately tracking these complex secondary conditions. When searching for the ICD-10 code for cranial nerve palsy due to diabetes mellitus, G53 is the precise category to reference.
Diseases of the nervous system (G00–G99)
Nerve, nerve root and plexus disorders (G50-G59)
- G53 Cranial nerve disorders in diseases classified elsewhere
Cranial nerve disorders in diseases classified elsewhere (G53)
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.
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.
