2023

  1. ICD-10-CM Codes
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  2. G00-G99
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  3. G50-G59
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  5. 2023 ICD-10-CM Diagnosis Code G58.9

2023 ICD-10-CM Diagnosis Code G58.9

Mononeuropathy, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • G58.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2023 edition of ICD-10-CM G58.9 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of G58.9 - other international versions of ICD-10 G58.9 may differ.
The following code(s) above G58.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to G58.9:
  • G00-G99
    2023 ICD-10-CM Range G00-G99

    Diseases of the nervous system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the nervous system
  • G50-G59
    2023 ICD-10-CM Range G50-G59

    Nerve, nerve root and plexus disorders

    Type 1 Excludes
    • current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region
    • neuralgia NOS (M79.2)
    • neuritis NOS (M79.2)
    • peripheral neuritis in pregnancy (O26.82-)
    • radiculitis NOS (M54.1-)
    Nerve, nerve root and plexus disorders
Approximate Synonyms
  • Diplopia (double vision) due to cranial nerve palsy
  • Mononeuritis
  • Mononeuropathy
  • Nerve entrapment due to scar
  • Nerve entrapment, posttraumatic
  • Perineural fibrosis
  • Peripheral nerve entrapment syndrome
  • Post-traumatic nerve entrapment
  • Scar, nerve entrapment
Clinical Information
  • Disease or trauma involving a single peripheral nerve in isolation, or out of proportion to evidence of diffuse peripheral nerve dysfunction. Mononeuropathy multiplex refers to a condition characterized by multiple isolated nerve injuries. Mononeuropathies may result from a wide variety of causes, including ischemia; traumatic injury; compression; connective tissue diseases; cumulative trauma disorders; and other conditions.
ICD-10-CM G58.9 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 073 Cranial and peripheral nerve disorders with mcc
  • 074 Cranial and peripheral nerve disorders without mcc

Convert G58.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change

Diagnosis Index entries containing back-references to G58.9:

ICD-10-CM Codes Adjacent To G58.9
G57.83 Other specified mononeuropathies of bilateral lower limbs
G57.9 Unspecified mononeuropathy of lower limb
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
G58 Other mononeuropathies
G58.0 Intercostal neuropathy
G58.7 Mononeuritis multiplex
G58.8 Other specified mononeuropathies
G58.9 Mononeuropathy, unspecified
G59 Mononeuropathy in diseases classified elsewhere
G60 Hereditary and idiopathic neuropathy
G60.0 Hereditary motor and sensory neuropathy
G60.1 Refsum's disease
G60.2 Neuropathy in association with hereditary ataxia
G60.3 Idiopathic progressive neuropathy
G60.8 Other hereditary and idiopathic neuropathies
G60.9 Hereditary and idiopathic neuropathy, unspecified
G61 Inflammatory polyneuropathy
G61.0 Guillain-Barre syndrome

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

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