ICD-10 Code B02.23 – Postherpetic polyneuropathy (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B02.23 – Postherpetic polyneuropathy
What it is
B02.23 identifies polyneuropathy that follows herpes zoster. Use it when documentation shows nerve pain or dysfunction affecting multiple peripheral nerves after shingles.
Clinical signs
Clinical features vary; refer to documentation. Commonly, you may see persistent neuropathic pain, numbness, tingling, or weakness after a herpes zoster episode.
When to use this code
Use this code when the record clearly links the neuropathy to prior shingles and the provider documents a postherpetic polyneuropathy. It is appropriate for ongoing nerve symptoms after the rash has resolved. Check documentation if the note only says “postherpetic neuralgia” or gives no nerve distribution details.
Do not use for
Do not use B02.23 for uncomplicated herpes zoster without neuropathy, or for nonspecific pain after shingles unless polyneuropathy is documented. Do not assume the diagnosis from history alone.
Coding tip
Confirm that the provider links the neuropathy to herpes zoster and documents polyneuropathy, not just generalized post-shingles pain.