2021 ICD-10-CM Diagnosis Code G56.91

Unspecified mononeuropathy of right upper limb

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • G56.91 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM G56.91 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of G56.91 - other international versions of ICD-10 G56.91 may differ.
The following code(s) above G56.91 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 G56.91:
  • G00-G99
    2021 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
    2021 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
  • G56
    ICD-10-CM Diagnosis Code G56

    Mononeuropathies of upper limb

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • current traumatic nerve disorder - see nerve injury by body region
    Mononeuropathies of upper limb
Approximate Synonyms
  • Arm peripheral nerve disorder, both sides
  • Axillary nerve disorder
  • Entrapment of right musculocutaneous nerve
  • Left hand nerve compression
  • Left hand nerve entrapment
  • Mononeuritis of right arm
  • Mononeuritis, r arm
  • Mononeuropathy of right upper limb
  • Mononeuropathy, right arm
  • Musculocutaneous nerve palsy, right arm
  • Peripheral nerve compression, right arm
  • Peripheral nerve disorder, right arm
  • Peripheral nerve entrapment of right upper limb
  • Peripheral nerve entrapment, right arm
  • Peripheral neuropathy of bilateral upper limbs
  • Peripheral neuropathy of right upper limb
  • Postoperative neuroma of right arm
  • Postsurgical neuroma, right arm
  • Right axillary neuropathy
  • Right musculocutaneous nerve entrapment
  • Right musculocutaneous nerve paralysis
ICD-10-CM G56.91 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 073 Cranial and peripheral nerve disorders with mcc
  • 074 Cranial and peripheral nerve disorders without mcc

Convert G56.91 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
ICD-10-CM Codes Adjacent To G56.91
G56.41 Causalgia of right upper limb
G56.42 Causalgia of left upper limb
G56.43 Causalgia of bilateral upper limbs
G56.8 Other specified mononeuropathies of upper limb
G56.80 Other specified mononeuropathies of unspecified upper limb
G56.81 Other specified mononeuropathies of right upper limb
G56.82 Other specified mononeuropathies of left upper limb
G56.83 Other specified mononeuropathies of bilateral upper limbs
G56.9 Unspecified mononeuropathy of upper limb
G56.90 Unspecified mononeuropathy of unspecified upper limb
G56.91 Unspecified mononeuropathy of right upper limb
G56.92 Unspecified mononeuropathy of left upper limb
G56.93 Unspecified mononeuropathy of bilateral upper limbs
G57 Mononeuropathies of lower limb
G57.0 Lesion of sciatic nerve
G57.00 …… unspecified lower limb
G57.01 …… right lower limb
G57.02 …… left lower limb
G57.03 …… bilateral lower limbs
G57.1 Meralgia paresthetica
G57.10 …… unspecified lower limb

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