2027 ICD-10-CM Diagnosis Code G56.00Carpal tunnel syndrome, unspecified upper limb
ICD-10-CM Codes›G00–G99›G50-G59›G56
- Billable — Valid for Submission
- Chronic Condition
G56.00 is a billable ICD-10-CM diagnosis code for carpal tunnel syndrome, unspecified upper 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 anterior interosseous nerve entrapment. 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.
- Anterior interosseous nerve entrapment
- Anterior interosseous nerve lesion
- Atrophy of intrinsic muscle of hand
- Atrophy of muscle of hand
- Atrophy of thenar muscle
- Carpal tunnel syndrome
- Median nerve compression in forearm
- Median nerve entrapment
- Partial thenar atrophy
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G56.00: its own notes plus those printed at 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 G56.00, its category, or a range that includes it.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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)
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 G56.00 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G56.00Overview
What is the ICD-10 code for carpal tunnel syndrome, unspecified upper limb?
The ICD-10-CM code for carpal tunnel syndrome, unspecified upper limb is G56.00 (sometimes written as G5600). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is G56.00 (Carpal tunnel syndrome) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report carpal tunnel syndrome, unspecified upper limb on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does G56.00 group to?
When carpal tunnel syndrome, unspecified upper 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 G56.00 be reported with M79.2?
Not as a rule. The Excludes1 note at block G50-G59, which applies to G56.00, 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 G56.00?
Under the General Equivalence Mappings, carpal tunnel syndrome, unspecified upper limb converts to ICD-9-CM 354.0 (carpal tunnel syndrome). The mapping is approximate, so confirm the match fits the documentation.
