FY2027 ICD-10-CM reference
G56: Mononeuropathies of upper limb
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Mononeuropathies of upper limb. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
More specific FY2027 codes
- G56.0: Carpal tunnel syndromeNonbillable heading
- G56.1: Other lesions of median nerveNonbillable heading
- G56.2: Lesion of ulnar nerveNonbillable heading
- G56.3: Lesion of radial nerveNonbillable heading
- G56.4: Causalgia of upper limbNonbillable heading
- G56.8: Other specified mononeuropathies of upper limbNonbillable heading
- G56.9: Unspecified mononeuropathy of upper limbNonbillable heading
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: G00-G99 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: G00-G99 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: G00-G99 (chapter, inherited).
Excludes2
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
Source: G00-G99 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: G00-G99 (chapter, inherited).
Excludes2
injury, poisoning and certain other consequences of external causes (S00-T88)
Source: G00-G99 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: G00-G99 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: G00-G99 (chapter, inherited).
Excludes1
current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region
Source: G50-G59 (section, inherited).
Excludes1
neuralgia NOS (M79.2)
Source: G50-G59 (section, inherited).
Excludes1
neuritis NOS (M79.2)
Source: G50-G59 (section, inherited).
Excludes1
peripheral neuritis in pregnancy (O26.82-)
Source: G50-G59 (section, inherited).
Excludes1
radiculitis NOS (M54.1-)
Source: G50-G59 (section, inherited).
Excludes1
current traumatic nerve disorder - see nerve injury by body region
Source: G56 (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does G56 mean in FY2027?
The official ICD-10-CM descriptor is Mononeuropathies of upper limb. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is G56 billable in FY2027?
The FY2027 order file marks G56 as a nonbillable heading. Select a complete billable child code.
Does G56 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition