ICD-10-CM 2027 diagnosis code
G57.71Causalgia of right lower limb
G57.71 is a valid, billable ICD-10-CM code for causalgia of right lower limb. 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 G57.71
G57.71 is the ICD-10-CM diagnosis code for Causalgia of right lower limb. It belongs to category G57 (mononeuropathies of lower limb), 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 G57.7 (Causalgia of lower limb), G57.71 is specifically for Causalgia of right lower limb. Related codes cover unspecified lower limb (G57.70), left lower limb (G57.72) and bilateral lower limbs (G57.73).
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 355.71 (Causalgia of lower limb).
Notes that apply from higher levels
Instructions written at a parent level also apply to G57.71.
› From G57 Mononeuropathies of lower limb
- current traumatic nerve disorder - see nerve injury by body region
Broader instructions also apply from G50-G59 Nerve, nerve root and plexus disorders and Chapter 6: Diseases of the nervous system.
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.
MDC 01 · Diseases and Disorders of the Nervous System
ICD-9-CM equivalent
Converter →- 355.71Causalgia of lower limbapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about G57.71
Is G57.71 billable?
- Yes. G57.71 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G57.71 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G57.71 as a principal diagnosis.
Is G57.71 a CC or MCC?
- No. G57.71 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does G57.71 group to?
- G57.71 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 G57.71?
- The CMS General Equivalence Mappings map G57.71 to ICD-9-CM 355.71.