ICD-10-CM diagnosis code
G56.02 Carpal tunnel syndrome, left upper limb
- Billable
- Yes, a complete code (FY2026)
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Other codes in G56
28 complete codes in this category.
- G56.00Carpal tunnel syndrome, unspecified upper limb
- G56.01Carpal tunnel syndrome, right upper limb
- G56.02Carpal tunnel syndrome, left upper limb
- G56.03Carpal tunnel syndrome, bilateral upper limbs
- G56.10Other lesions of median nerve, unspecified upper limb
- G56.11Other lesions of median nerve, right upper limb
- G56.12Other lesions of median nerve, left upper limb
- G56.13Other lesions of median nerve, bilateral upper limbs
- G56.20Lesion of ulnar nerve, unspecified upper limb
- G56.21Lesion of ulnar nerve, right upper limb
- G56.22Lesion of ulnar nerve, left upper limb
- G56.23Lesion of ulnar nerve, bilateral upper limbs
Documentation tips
- Make sure the note supports every element of the title, “Carpal tunnel syndrome, left upper limb”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to G56.
The international WHO ICD-10 also has G56, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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