All ICD10 Codes
G64Billable, valid for claims from October 1, 2026

Other disorders of peripheral nervous system

In Polyneuropathies and other disorders of the peripheral nervous system (G60-G65), chapter 6: Diseases of the Nervous System

  • G64 is billable and valid on claims for FY 2027. If the record has more detail, check the other codes under G60-G65 below.
  • As a secondary diagnosis it is not a CC or MCC, so it doesn't raise the MS-DRG payment.
  • Doesn't count toward a Medicare Advantage risk score (no HCC in V28).
  • AHRQ's Chronic Condition Indicator classes it as chronic: expected to last 12 months or longer and to limit daily life or need ongoing care.

Also indexed as: Disorder, peripheral nervous system NEC

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Instructional notes

Includes: conditions that are coded here

  • Disorder of peripheral nervous system NOS

Also applies, from Polyneuropathies and other disorders of the peripheral nervous system (G60-G65)

These notes sit on G60-G65 and apply to every code under it, including G64.

Excludes1: not coded here, use a different code

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers default dominant or nondominant side for hemiplegia and monoplegia, and use and sequencing of G89 pain codes, including postoperative, chronic, and neoplasm-related pain.

Read Section I.C.6 (page 45)

Other codes under G60-G65

Polyneuropathies and other disorders of the peripheral nervous system (G60-G65)

G64 MS-DRGs

As the principal diagnosis, G64 groups to MS-DRG 073 or 074 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Related conditions

Grouped by AHRQ's Clinical Classifications Software Refined (CCSR), which sorts every diagnosis code into clinically meaningful categories.

G64 is in Other nervous system disorders (neither hereditary nor degenerative) (NVS020, its default category), with 111 codes. Others in it:

  • A17.89 Other tuberculosis of nervous system
  • A17.9 Tuberculosis of nervous system, unspecified
  • B27.01 Gammaherpesviral mononucleosis with polyneuropathy
  • B27.11 Cytomegaloviral mononucleosis with polyneuropathy
  • B27.81 Other infectious mononucleosis with polyneuropathy
  • B27.91 Infectious mononucleosis, unspecified with polyneuropathy
  • E08.40 Diabetes mellitus due to underlying condition with diabetic neuropathy, unspecified
  • E08.44 Diabetes mellitus due to underlying condition with diabetic amyotrophy

Medicare coverage articles listing G64

These 9 Medicare billing and coding articles list G64 as a diagnosis that supports medical necessity for the services they cover. From the CMS Medicare Coverage Database; check your own contractor's article before billing.

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

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. Peripheral nerves carry messages from your brain that control your movement, breathing, heartbeat, digestion, and more. They also carry messages from your body to your brain, so you can feel things, such as pain, heat, and cold.

Read more about peripheral nerve disorders on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.

ICD-9-CM equivalent

Legacy crosswalk from the CMS General Equivalence Mappings (last updated 2018).

  • 357.89 Other inflammatory and toxic neuropathy (approximate)
ICD-9 to ICD-10 converter