Alphabetic Index FY2027

G63

Polyneuropathy in diseases classified elsewhere

FY2027Chapter 6: Diseases of the nervous system/G60–G65 Polyneuropathies and other disorders of the peripheral nervous system

BillableComplete code, valid to report
Care settingsIRF 60% RuleHospice: not accepted as primary

G63 is a billable ICD-10-CM diagnosis code for polyneuropathy in diseases classified elsewhere. It is part of the FY2027 code set, effective October 1, 2026. The Alphabetic Index lists it under 35 entries. Its coding notes include a Code first instruction, 14 Excludes1 entries and 8 Excludes2 entries.

Code first

If the underlying condition listed here is present and known, sequence it first.

This code
  • underlying disease, such as:
    • amyloidosis (E85.-)
    • endocrine disease, except diabetes (E00-E07, E15-E16, E20-E34)
    • metabolic diseases (E70-E88)
    • neoplasm (C00-D49)
    • nutritional deficiency (E40-E64)

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code
  • polyneuropathy (in):
Also from chapter/block level (4 notes)
Inherited from G60–G65 Polyneuropathies and other disorders of the peripheral nervous system

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Also from chapter/block level (8 notes)
Inherited from Chapter 6 Diseases of the nervous system
  • 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)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

IRF 60% Rule

On the CMS list of diagnoses used to determine presumptive compliance with the IRF 60 percent rule.

Source: CMS IRF Presumptive Compliance-3, FY 2027 IRF PPS final rule files, effective for discharges on or after October 1, 2026

Hospice: not accepted as primary

Not accepted as the principal diagnosis on a hospice claim (bill types 081x and 082x). The Integrated OCE returns an edit for this code.
Reason: Manifestation code. Report the underlying condition first (see the Code first note).

Source: CMS Integrated Outpatient Code Editor (IOCE) v27.3, effective October 1, 2026, edit 86

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 35 entries

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