2027 ICD-10-CM Diagnosis Code G57.81Other specified mononeuropathies of right lower limb
ICD-10-CM Codes›G00–G99›G50-G59›G57
- Billable — Valid for Submission
- Chronic Condition
G57.81 is a billable ICD-10-CM diagnosis code for other specified mononeuropathies of right lower limb. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 73 through 74. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nerve and nerve root disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Compression neuropathy of genitofemoral nerve
- Compression neuropathy of ilioinguinal nerve
- Compression neuropathy of right genitofemoral nerve
- Compression neuropathy of right ilioinguinal nerve
- Disorder of right ilioinguinal nerve
- Disorder of right sural nerve
- Entrapment of genitofemoral nerve
- Entrapment of obturator nerve
- Entrapment of peripheral nerve of right lower limb
- Entrapment of right genitofemoral nerve
- Entrapment of right obturator nerve
- Entrapment of right sural nerve
- Entrapment of sural nerve
- Genitofemoral neuropathy
- Iliohypogastric nerve neuralgia
- Iliohypogastric nerve neuritis
- Ilioinguinal nerve neuritis
- Inflammation of peripheral nerve of ankle
- Inflammation of peripheral nerve of right ankle
- Inflammation of peripheral nerve of right lower limb
- Lesion of right tibial nerve
- Lesion of sural nerve
- Neuralgia of right iliohypogastric nerve
- Neuritis of saphenous nerve
- Obturator nerve compression
- Obturator neuropathy
- Right foot neuritis
- Right genitofemoral neuropathy
- Right iliohypogastric neuritis
- Right ilioinguinal neuritis
- Right obturator neuropathy
- Right saphenous neuritis
- Right tibial neuropathy
- Sural neuropathy
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G57.81: its own notes plus those printed at G57, block G50-G59, and Chapter 6. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- current traumatic nerve disorder - see nerve injury by body region
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name G57.81, its category, or a range that includes it.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Peripheral Nerve Disorders
Nerves are like wires that carry messages back and forth between your brain and your body. Your peripheral nerves branch off from your brain and spinal cord and connect to all parts of your body, including your muscles and organs.
The full article covers:
- What are peripheral nerves?
- What are peripheral nerve disorders?
- What causes peripheral nerve disorders?
- What are the symptoms of peripheral nerve disorders?
- How are peripheral nerve disorders diagnosed?
- What are the treatments for peripheral nerve disorders?
- Can peripheral nerve disorders be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert G57.81 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G57.81Overview
What is the ICD-10 code for other specified mononeuropathies of right lower limb?
The ICD-10-CM code for other specified mononeuropathies of right lower limb is G57.81 (sometimes written as G5781). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is G57.81 (Other specified mononeuropathies of lower limb) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified mononeuropathies of right lower limb on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does G57.81 group to?
When other specified mononeuropathies of right lower limb is the principal diagnosis on an inpatient stay, it groups to MS-DRG 74, 73, with relative weights from 1.0172 to 1.5773 depending on complications. Higher weights mean higher Medicare reimbursement.
Can G57.81 be reported with M79.2?
Not as a rule. The Excludes1 note at block G50-G59, which applies to G57.81, lists "neuralgia NOS (M79.2)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of G57.81?
Under the General Equivalence Mappings, other specified mononeuropathies of right lower limb converts to ICD-9-CM 355.79 (oth mononeur lower limb). The mapping is approximate, so confirm the match fits the documentation.
