Skip to content
Dx

ICD-10-CM 2027 diagnosis code

G57.73Causalgia of bilateral lower limbs

✓ Billable / specific

G57.73 is a valid, billable ICD-10-CM code for causalgia of bilateral lower limbs. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

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 G57.73

G57.73 is the ICD-10-CM diagnosis code for Causalgia of bilateral lower limbs. 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), G57.73 is specifically for Causalgia of bilateral lower limbs. Related codes cover unspecified lower limb (G57.70), right lower limb (G57.71) and left lower limb (G57.72).

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 355.71 (Causalgia of lower limb).

Notes that apply from higher levels

Instructions written at a parent level also apply to G57.73.

› From G57.7 Causalgia of lower limb
Excludes1
  • complex regional pain syndrome I of lower limb (G90.52-)
  • complex regional pain syndrome I of upper limb (G90.51-)
  • complex regional pain syndrome II of upper limb (G56.4-)
  • reflex sympathetic dystrophy of lower limb (G90.52-)
  • reflex sympathetic dystrophy of upper limb (G90.51-)
› From G57 Mononeuropathies of lower limb
Excludes1
  • 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.

ICD-9-CM equivalent

Converter →
  • 355.71Causalgia of lower 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
  • FY2017 (effective 10/1/2016): Added
  • No changes since FY2017.

Common questions about G57.73

Is G57.73 billable?

Yes. G57.73 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can G57.73 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict G57.73 as a principal diagnosis.

Is G57.73 a CC or MCC?

No. G57.73 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does G57.73 group to?

G57.73 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 G57.73?

The CMS General Equivalence Mappings map G57.73 to ICD-9-CM 355.71.