ICD-10 Code B02.22 – Postherpetic Trigeminal Neuralgia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B02.22 – Postherpetic trigeminal neuralgia
What it is
B02.22 identifies trigeminal nerve pain that persists after herpes zoster. Use it when the chart documents postherpetic neuralgia affecting one or more trigeminal branches.
Clinical signs
Typical findings include unilateral facial pain, burning, stabbing, or electric-shock sensations in a trigeminal distribution after shingles. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider clearly links ongoing facial neuralgia to prior herpes zoster. It fits follow-up visits for persistent post-shingles pain involving the ophthalmic, maxillary, or mandibular branches. If the record only says facial pain, check documentation.
Do not use for
Do not use B02.22 for acute herpes zoster without neuralgia, or for trigeminal neuralgia without a postherpetic cause. Do not assume laterality or nerve branch unless documented.
Coding tip
Verify that the note states both postherpetic neuralgia and trigeminal involvement before assigning B02.22.