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ICD-10-CM 2027 diagnosis code

G58.0Intercostal neuropathy

✓ Billable / specific

G58.0 is a valid, billable ICD-10-CM code for intercostal neuropathy. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About G58.0

G58.0 is the ICD-10-CM diagnosis code for intercostal neuropathy. It belongs to category G58 (other mononeuropathies), block G50-G59 (nerve, nerve root and plexus disorders) 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 G58 (other mononeuropathies), G58.0 is specifically for intercostal neuropathy. Related codes cover mononeuritis multiplex (G58.7), other specified mononeuropathies (G58.8) and mononeuropathy, unspecified (G58.9).

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 has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 354.8 (other mononeuritis of upper limb).

Notes that apply from higher levels

Instructions written at a parent level also apply to G58.0.

Broader instructions also apply from G50-G59 Nerve, nerve root and plexus disorders and Chapter 6: Diseases of the nervous system.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to G58.0.

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 →
  • 354.8Other mononeuritis of upper limbapproximate

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
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about G58.0

Is G58.0 billable?

Yes. G58.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can G58.0 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict G58.0 as a principal diagnosis.

Is G58.0 a CC or MCC?

No. G58.0 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does G58.0 group to?

G58.0 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 G58.0?

The CMS General Equivalence Mappings map G58.0 to ICD-9-CM 354.8.