2027 ICD-10-CM Diagnosis Code G65Sequelae of inflammatory and toxic polyneuropathies

ICD-10-CM Codes›G00–G99›G60-G65›G65

ICD-10-CM G65
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

G65 is a non-billable ICD-10-CM category code for sequelae of inflammatory and toxic polyneuropathies, so it cannot be submitted on claims. Use a more specific code from this category instead, such as G65.0, G65.1, and G65.2.

Code Identity

ICD-10-CM Code
G65
Billable Status
No — Non-Billable Category
Code Describes
Sequelae of inflammatory and toxic polyneuropathies
Short Description
Sequelae of inflammatory and toxic polyneuropathies
Same as the full description in the CMS dataset.
Chapter
G60-G65
Polyneuropathies and other disorders of the peripheral nervous system

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG60-G65Polyneuropathies and other disorders of the peripheral nervous system
CategoryG65Sequelae of inflammatory and toxic polyneuropathies
This CodeG65Sequelae of inflammatory and toxic polyneuropathies

Specific Coding for Sequelae of inflammatory and toxic polyneuropathiesOverview

Non-specific codes like G65 require more characters. Use one of these billable codes instead:

  • Use G65.0 for Sequelae of Guillain-Barre syndrome

  • Use G65.1 for Sequelae of other inflammatory polyneuropathy

  • Use G65.2 for Sequelae of toxic polyneuropathy

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to G65: its own notes plus those printed at block G60-G65 and Chapter 6. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block G60-G65 Polyneuropathies and other disorders of the peripheral nervous system applies to 24 codes

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 6 (G00-G99) Diseases of the nervous system applies to 700 codes
  • 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)

Code First

The underlying condition named in the note is sequenced before this code.

  • condition resulting from (sequela) of inflammatory and toxic polyneuropathies

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Patient EducationClinical

Peripheral Nerve Disorders

Nerves are like wires that carry messages back and forth between your brain and your body. Your peripheral nerves branch off from your brain and spinal cord and connect to all parts of your body, including your muscles and organs.

The full article covers:

  • What are peripheral nerves?
  • What are peripheral nerve disorders?
  • What causes peripheral nerve disorders?
  • What are the symptoms of peripheral nerve disorders?
  • How are peripheral nerve disorders diagnosed?
  • What are the treatments for peripheral nerve disorders?
  • Can peripheral nerve disorders be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About G65Overview

What is the ICD-10 code for sequelae of inflammatory and toxic polyneuropathies?

G65 is the ICD-10-CM category for sequelae of inflammatory and toxic polyneuropathies, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is G65 (Sequelae of inflammatory and toxic polyneuropathies) a billable code?

No. This is a category header that groups the codes for sequelae of inflammatory and toxic polyneuropathies, and headers cannot be submitted on claims. Claims for sequelae of inflammatory and toxic polyneuropathies need a more specific code from this category, such as G65.0, G65.1, and G65.2.

Can G65 be reported with M79.2?

Not as a rule. The Excludes1 note at block G60-G65, which applies to G65, lists "neuralgia NOS (M79.2)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is coded first with G65?

The Code First note reads: condition resulting from (sequela) of inflammatory and toxic polyneuropathies. When one of these applies, it is sequenced before G65.