ICD-10-CM › G00-G99 › G50-G59 › G57.9 Unspecified mononeuropathy of lower limb › G57.91

G57.91

Unspecified mononeuropathy of right lower limb

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2016 onwards.

What has happened to this code

Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2007 Added to the draft code set draft Mononeuropathy of lower limb, unspecified, right side
  2. FY2011 Draft description revised draft Mononeuropathy of lower limb, unspecified, right side Unspecified mononeuropathy of right lower limb

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from G57 Mononeuropathies of lower limb

Excludes1 - never coded here

  • current traumatic nerve disorder - see nerve injury by body region

Inherited from the G50-G59 section Nerve, nerve root and plexus disorders (G50-G59)

Excludes1 - never coded here

  • current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region
  • neuralgia NOS (M79.2)
  • neuritis NOS (M79.2)
  • peripheral neuritis in pregnancy (O26.82-)
  • radiculitis NOS (M54.1-)

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Codes in the same group

CodeDescriptionStatus
G57.90 Unspecified mononeuropathy of unspecified lower limb Valid
G57.92 Unspecified mononeuropathy of left lower limb Valid
G57.93 Unspecified mononeuropathy of bilateral lower limbs Valid