2027 ICD-10-CM Diagnosis Code G56.43Causalgia of bilateral upper limbs
ICD-10-CM Codes›G00–G99›G50-G59›G56
- Billable — Valid for Submission
- Chronic Condition
G56.43 is a billable ICD-10-CM diagnosis code for causalgia of bilateral upper limbs. 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 bilateral chronic pain of upper limbs. 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.
- Bilateral chronic pain of upper limbs
- Chronic pain of left upper limb
- Chronic pain of right upper limb
- Complex regional pain syndrome type 2 of bilateral upper limbs
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G56.43: its own notes plus those printed at G56.4, G56, 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 G56.43, its category, or a range that includes it.
Excludes1 8
These codes carry an Excludes1 note naming G56.43: they are not reported together with it, unless the two conditions are unrelated.
- G57.7 Causalgia of lower limbcomplex regional pain syndrome II of upper limb (G56.4-) names G56.4-, which includes this code
- G89.2 Chronic pain, not elsewhere classifiedcausalgia, upper limb (G56.4-) names G56.4-, which includes this code
- G89.2 Chronic pain, not elsewhere classifiedcomplex regional pain syndrome II, upper limb (G56.4-) names G56.4-, which includes this code
- G90.5 Complex regional pain syndrome I (CRPS I)causalgia of upper limb (G56.4-) names G56.4-, which includes this code
- G90.5 Complex regional pain syndrome I (CRPS I)complex regional pain syndrome II of upper limb (G56.4-) names G56.4-, which includes this code
- M89.0 Algoneurodystrophycausalgia, upper limb (G56.4-) names G56.4-, which includes this code
- M89.0 Algoneurodystrophycomplex regional pain syndrome II, upper limb (G56.4-) names G56.4-, which includes this code
- M79.2 Neuralgia and neuritis, unspecified
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Causalgia
a complex regional pain syndrome characterized by burning pain and marked sensitivity to touch (hyperesthesia) in the distribution of an injured peripheral nerve. autonomic dysfunction in the form of sudomotor (i.e., sympathetic innervation to sweat glands), vasomotor, and trophic skin changes may also occur. (adams et al., principles of neurology, 6th ed, p1359)
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 G56.43 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code History & ChangesHistory
Replacement G56.43 replaces the following previously assigned code(s):
- G56.41 - Causalgia of right upper limb
- G56.42 - Causalgia of left upper limb
Questions About G56.43Overview
What is the ICD-10 code for causalgia of bilateral upper limbs?
The ICD-10-CM code for causalgia of bilateral upper limbs is G56.43 (sometimes written as G5643). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is G56.43 (Causalgia of upper limb) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report causalgia of bilateral upper limbs on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does G56.43 group to?
When causalgia of bilateral upper limbs 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 G56.43 be reported with a code from G90.52?
Not as a rule. The Excludes1 note at G56.4, which applies to G56.43, 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 G56.43?
Under the General Equivalence Mappings, causalgia of bilateral upper limbs converts to ICD-9-CM 354.4 (causalgia upper limb). The mapping is approximate, so confirm the match fits the documentation.
