2027 ICD-10-CM Diagnosis Code G57.72Causalgia of left lower limb
ICD-10-CM Codes›G00–G99›G50-G59›G57
- Billable — Valid for Submission
- Chronic Condition
G57.72 is a billable ICD-10-CM diagnosis code for causalgia of left 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. Coders also document this condition as complex regional pain syndrome of lower limb. 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.
- Complex regional pain syndrome of lower limb
- Complex regional pain syndrome type II of left lower limb
- Complex regional pain syndrome, type II
- Complex regional pain syndrome, type II, lower limb
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G57.72: its own notes plus those printed at G57.7, 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 G57.72, its category, or a range that includes it.
Excludes1 8
These codes carry an Excludes1 note naming G57.72: they are not reported together with it, unless the two conditions are unrelated.
- G56.4 Causalgia of upper limbcomplex regional pain syndrome II of lower limb (G57.7-) names G57.7-, which includes this code
- G89.2 Chronic pain, not elsewhere classifiedcausalgia, lower limb (G57.7-) names G57.7-, which includes this code
- G89.2 Chronic pain, not elsewhere classifiedcomplex regional pain syndrome II, lower limb (G57.7-) names G57.7-, which includes this code
- G90.5 Complex regional pain syndrome I (CRPS I)causalgia of lower limb (G57.7-) names G57.7-, which includes this code
- G90.5 Complex regional pain syndrome I (CRPS I)complex regional pain syndrome II of lower limb (G57.7-) names G57.7-, which includes this code
- M89.0 Algoneurodystrophycausalgia, lower limb (G57.7-) names G57.7-, which includes this code
- M89.0 Algoneurodystrophycomplex regional pain syndrome II, lower limb (G57.7-) names G57.7-, which includes this code
- M79.2 Neuralgia and neuritis, unspecified
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Complex Regional Pain Syndrome
Complex regional pain syndrome (CRPS) is a chronic pain condition. It causes intense pain, usually in the arms, hands, legs, or feet. It may happen after an injury, either to a nerve or to tissue in the affected area. Rest and time may only make it worse.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert G57.72 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G57.72Overview
What is the ICD-10 code for causalgia of left lower limb?
The ICD-10-CM code for causalgia of left lower limb is G57.72 (sometimes written as G5772). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is G57.72 (Causalgia of lower limb) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report causalgia of left lower limb on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does G57.72 group to?
When causalgia of left 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 G57.72 be reported with a code from G90.52?
Not as a rule. The Excludes1 note at G57.7, which applies to G57.72, lists "complex regional pain syndrome I of lower limb (G90.52-)". 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 G57.72?
Under the General Equivalence Mappings, causalgia of left lower limb converts to ICD-9-CM 355.71 (causalgia lower limb). The mapping is approximate, so confirm the match fits the documentation.
