Dataset or benchmark

ICD-10-CM lookup for code G56.0 (NLM Clinical Tables API)

U.S. National Library of Medicine, U.S. National Library of Medicine, Clinical Tables, 2026

Read on October 17, 2026

What it is: The U.S. National Library of Medicine's public lookup service for ICD-10-CM codes. A search for G56.0 returns the four child codes for carpal tunnel syndrome, each with its official description.
How much weight it carries: Run by a federal library that publishes ICD-10-CM data from the same code set as the CDC files. The response does not state which code-set year it uses, so check the CDC release for the year that applies to your claim or record.

Facts taken from this source

The NLM ICD-10-CM lookup lists four codes under G56.0 for carpal tunnel syndrome: G56.00 for an unspecified upper limb, G56.01 for the right, G56.02 for the left and G56.03 for bilateral upper limbs.
“"G56.00","Carpal tunnel syndrome, unspecified upper limb"],["G56.01","Carpal tunnel syndrome, right upper limb"],["G56.02","Carpal tunnel syndrome, left upper limb"],["G56.03","Carpal tunnel syndrome, bilateral upper limbs"” (JSON response, code and name pairs)