Injury of digital nerve of unspecified finger, sequela

This code indicates a long-term or late effect resulting from a past injury to a digital nerve in an unspecified finger. The initial acute injury has resolved, but the patient continues to experience residual symptoms such as chronic pain, numbness, or weakness attributable to the nerve damage.

Apply this code when documenting conditions like persistent paresthesia, hypoesthesia, or neuropathic pain in a finger, where the original nerve injury occurred at some point in the past and is no longer acute. This is appropriate for follow-up encounters addressing these chronic sequelae.

• Always use a seventh character of "S" for sequela, indicating a late effect.
• Do not use this code for acute or initial nerve injuries; those require an "A" or "D" seventh character.
• If the specific finger is known, a more precise code from the S64.4 series should be used.