2026 ICD-10-CM Diagnosis Code G56.02Carpal tunnel syndrome, left upper limb

ICD-10-CM Codes›G00–G99›G50-G59›G56

ICD-10-CM G56.02
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

G56.02 is a billable ICD-10-CM diagnosis code for carpal tunnel syndrome, left upper limb. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nerve and nerve root disorders.

Code Identity

ICD-10-CM Code
G56.02
Billable Status
Yes — Valid for Submission
Code Describes
Carpal tunnel syndrome, left upper limb
Short Description
Carpal tunnel syndrome, left upper limb
Same as the full description in the CMS dataset.
Parent Code
G56.0
Carpal tunnel syndrome

Code Classification

ChapterG00–G99Diseases of the nervous system
SectionG50-G59Nerve, nerve root and plexus disorders
CategoryG56Mononeuropathies of upper limb
This CodeG56.02Carpal tunnel syndrome, left upper limb

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral carpal tunnel syndrome
  • Bilateral disorder of median nerves
  • Bilateral entrapment of peripheral nerve of upper limbs
  • Bilateral upper limb mononeuropathy
  • Carpal tunnel syndrome
  • Carpal tunnel syndrome of left wrist
  • Carpal tunnel syndrome of right wrist
  • Disorder of left median nerve
  • Disorder of right median nerve
  • Entrapment of left median nerve
  • Entrapment of right median nerve
  • Lesion of bilateral median nerves
  • Lesion of left median nerve
  • Lesion of right median nerve

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS017
Nerve and nerve root disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Carpal Tunnel Syndrome

    entrapment of the median nerve in the carpal tunnel, which is formed by the flexor retinaculum and the carpal bones. this syndrome may be associated with repetitive occupational trauma (cumulative trauma disorders); wrist injuries; amyloid neuropathies; rheumatoid arthritis (see arthritis, rheumatoid); acromegaly; pregnancy; and other conditions. symptoms include burning pain and paresthesias involving the ventral surface of the hand and fingers which may radiate proximally. impairment of sensation in the distribution of the median nerve and thenar muscle atrophy may occur. (joynt, clinical neurology, 1995, ch51, p45)

  • Carpal Tunnel Syndrome

    entrapment of the median nerve in the wrist that is characterized by numbness, tingling and painful movement.

  • TTR wt Allele|ATTR|CTS|CTS1|Carpal Tunnel Syndrome 1 Gene|Epididymis Luminal Protein 111 Gene|HEL111|HsT2651|PALB|Prealbumin, Amyloidosis Type I Gene|Prealbumin, Thyroxine-Binding Gene|TBPA|Transthyretin wt Allele

    human ttr wild-type allele is located in the vicinity of 18q12.1 and is approximately 7 kb in length. this allele, which encodes transthyretin protein, plays a role in the stabilization and transport of thyroxine and retinol. mutations in the gene are associated with hyperthyroxinemia and amyloidosis types 1 and 7.

Patient EducationClinical

Carpal Tunnel Syndrome

Carpal tunnel syndrome is the name for a group of problems that includes numbness, tingling, weakness, or pain in your wrist or hand. It's a very common condition that happens when a nerve in your wrist becomes squeezed.

The full article covers:

  • What is carpal tunnel syndrome?
  • What causes carpal tunnel syndrome?
  • Who is more likely to develop carpal tunnel syndrome?
  • What are the symptoms of carpal tunnel syndrome?
  • How is carpal tunnel syndrome diagnosed?
  • What are the treatments for carpal tunnel syndrome?
  • Can carpal tunnel syndrome be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert G56.02 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
354.0 Carpal tunnel syndrome
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About G56.02Overview

Is G56.02 (Carpal tunnel syndrome) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report carpal tunnel syndrome, left upper limb on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of G56.02?

Under the General Equivalence Mappings, carpal tunnel syndrome, left upper limb converts to ICD-9-CM 354.0 (carpal tunnel syndrome). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.