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ICD-10-CM 2027 diagnosis code

G61.82Multifocal motor neuropathy

✓ Billable / specific

G61.82 is a valid, billable ICD-10-CM code for multifocal motor neuropathy. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for MMN.

Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About G61.82

G61.82 is the ICD-10-CM diagnosis code for multifocal motor neuropathy. It belongs to category G61 (inflammatory polyneuropathy), block G60-G65 (polyneuropathies and other disorders of the peripheral nervous system) and chapter 6 (diseases of the nervous system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within G61.8 (other inflammatory polyneuropathies), G61.82 is specifically for multifocal motor neuropathy. Related codes cover chronic inflammatory demyelinating polyneuritis (G61.81) and other inflammatory polyneuropathies (G61.89).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 073 (Cranial and Peripheral Nerve Disorders with MCC, relative weight 1.5779) and DRG 074 (Cranial and Peripheral Nerve Disorders without MCC, relative weight 1.0173), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It was added in FY2017, effective October 1, 2016.

Before ICD-10, this condition was coded in ICD-9-CM as 357.89 (other inflammatory and toxic neuropathy).

Coding notes

Applicable toConditions and synonyms classified to this code
  • MMN

Notes that apply from higher levels

Instructions written at a parent level also apply to G61.82.

Broader instructions also apply from G60-G65 Polyneuropathies and other disorders of the peripheral nervous system and Chapter 6: Diseases of the nervous system.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to G61.82.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 357.89Other inflammatory and toxic neuropathyapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2017 (effective 10/1/2016): Added
  • No changes since FY2017.

Common questions about G61.82

Is G61.82 billable?

Yes. G61.82 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can G61.82 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict G61.82 as a principal diagnosis.

Is G61.82 a CC or MCC?

No. G61.82 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does G61.82 group to?

G61.82 is used in the MS-DRG v44.0 logic for MS-DRG 073 (Cranial and Peripheral Nerve Disorders with MCC) and MS-DRG 074 (Cranial and Peripheral Nerve Disorders without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for G61.82?

The CMS General Equivalence Mappings map G61.82 to ICD-9-CM 357.89.