Other specified mononeuropathies of left upper limb

This code signifies a mononeuropathy affecting a specific nerve in the left upper limb, other than those explicitly classified elsewhere (e.g., carpal tunnel syndrome, ulnar neuropathy at the elbow). It indicates nerve dysfunction or damage that is localized to a single nerve distribution in the left arm, forearm, or hand.

Apply this code when documentation specifies a mononeuropathy of the left upper limb that doesn't have a more specific ICD-10-CM code. Examples include radial nerve palsy not due to fracture, anterior interosseous nerve syndrome, or suprascapular nerve entrapment affecting the left side. Documentation should clearly identify the specific nerve involved and its laterality.

• Always ensure the documentation specifies "left" upper limb; otherwise, an unspecified laterality code or right-sided code may be more appropriate.
• Distinguish this from polyneuropathies (G60-G65) which involve multiple nerves.
• Look for specific nerve entrapment syndromes that have their own dedicated codes (e.g., G56.0-G56.2 for carpal tunnel or ulnar neuropathy). Only use this code if a more specific code is not available.