G57.9 ICD-10-CM Code: Unspecified mononeuropathy of lower limb
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
G57.9Unspecified mononeuropathy of lower limb
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where G57.9 sits
- 1
Chapter 6
Diseases of the nervous system (G00-G99)
- 2
Section
Nerve, nerve root and plexus disorders (G50-G59)
- 3
Category G57
Mononeuropathies of lower limb
- 4
Code G57.9
Unspecified mononeuropathy of lower limb
More specific choices
Codes under G57.9
G57.9 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for G57.9.
Code first
No “code first” instruction is listed for G57.9.
Use additional code
No “use additional code” instruction is listed for G57.9.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for G57.9.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for G57.9.
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code G57.9 mean?
G57.9 is the FY 2027 U.S. ICD-10-CM code for “Unspecified mononeuropathy of lower limb.”
Is G57.9 a billable or specific ICD-10-CM code?
No. G57.9 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is G57.9 located in ICD-10-CM?
G57.9 is listed in Chapter 6, Diseases of the nervous system (G00-G99), within Nerve, nerve root and plexus disorders (G50-G59) (G50–G59), under category G57, Mononeuropathies of lower limb.
What coding notes are listed for G57.9?
No inclusion terms are listed for G57.9 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.
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