What does ICD-10 code G56 mean?

ICD-10 code G56 is the standardized code used for mononeuropathies of upper limb in medical records and coding systems.

When is ICD-10 code G56 used?

Doctors, hospitals, and insurers may use ICD-10 code G56 when recording mononeuropathies of upper limb in a standardized format. This entry may also act as a broader category that points toward more specific child codes.

Does ICD-10 code G56 confirm a diagnosis?

No. A code helps standardize documentation and claims, but it should not be read as a substitute for a clinician's full assessment.

ICD10

ICD-10 Code G56: Mononeuropathies of upper limb

Name: ICD-10 Code G56: Mononeuropathies of upper limb
Creator: HealthAssure Clinical Team
Published: 2026-05-21T06:07:09.432Z

G56 is an ICD-10 diagnosis entry used to group records related to Mononeuropathies of upper limb. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).

When is it used?

May be used when a clinician documents mononeuropathies of upper limb in a patient's medical record.
May appear in hospital records, claims, referrals, and clinical documentation.
This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

A code alone does not explain severity, treatment plan, or outcome.
A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
This entry may represent a broader category rather than the most specific billable code.

Code hierarchy

chapter

6Diseases of the nervous system (G00-G99)

block

G50-G59Nerve, nerve root and plexus disorders

currentG50-G59

Official coding notes

Excludes1 (do not code together)

current traumatic nerve disorder - see nerve injury by body region

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

NeurologistGeneral Physician

Sibling codes

G50Disorders of trigeminal nerve G51Facial nerve disorders G52Disorders of other cranial nerves G53Cranial nerve disorders in diseases classified elsewherebillable G54Nerve root and plexus disorders G55Nerve root and plexus compressions in diseases classified elsewherebillable G57Mononeuropathies of lower limb G58Other mononeuropathies G59Mononeuropathy in diseases classified elsewherebillable

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.

Legacy codes

G56

Common synonyms

Mononeuropathies of upper limb

Frequently asked questions

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.