G57.9
Non-billableUnspecified mononeuropathy of lower limb
Unspecified mononeuropathy of lower limb
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region
- •neuralgia NOSM79.2
- •neuritis NOSM79.2
- •peripheral neuritis in pregnancyO26.82
- •radiculitis NOSM54.1
- current traumatic nerve disorder - see nerve injury by body region
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
Child Codes (4)
Related Codes(9)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(5)
Frequently Asked Questions
What is the ICD-10 code for unspecified mononeuropathy of lower limb?
The ICD-10-CM code for unspecified mononeuropathy of lower limb is G57.9. The full clinical description is "Unspecified mononeuropathy of lower limb". G57.9 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code G57.9 mean?
ICD-10-CM code G57.9 represents “Unspecified mononeuropathy of lower limb”. It is classified under Chapter 6: Diseases of the Nervous System and is a non-billable header code. Use a more specific child code for billing purposes.
Is G57.9 a billable code?
No, G57.9 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 4 child codes under G57.9.
What chapter is G57.9 in?
G57.9 is in Chapter 6: Diseases of the Nervous System (codes G00-G99).
What codes cannot be used with G57.9?
G57.9 has Excludes1 notes indicating codes that cannot be used together with it, including: current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region; neuralgia NOS (M79.2); neuritis NOS (M79.2); and 3 more.
What are the subcategories under G57.9?
G57.9 has 4 child codes, including: G57.90 (Unspecified mononeuropathy of unspecified lower limb), G57.91 (Unspecified mononeuropathy of right lower limb), G57.92 (Unspecified mononeuropathy of left lower limb), G57.93 (Unspecified mononeuropathy of bilateral lower limbs).
What are the UMLS CUIs for G57.9?
G57.9 is linked to 1 UMLS Concept Unique Identifier: C0494489. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does G57.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like unspecified mononeuropathy of lower limb affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of G57.9?
G57.9 maps to the ICD-11 code: 8C11.Z (Mononeuropathies of lower limb, unspecified).
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.