ICD-10 Code A36.89 – Other diphtheritic complications (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A36.89 – Other diphtheritic complications
What it is
A36.89 identifies diphtheria complications that are not classified elsewhere. Use it when the record documents a diphtheritic complication, but the specific manifestation is not listed in another ICD-10-CM code.
Clinical signs
Clinical features vary; refer to documentation. Diphtheritic complications may include systemic effects after confirmed diphtheria infection, and the chart should link the complication to diphtheria rather than another cause.
When to use this code
Use this code when the provider documents an “other” diphtheritic complication and no more specific code applies. It is appropriate for records that clearly connect the complication to diphtheria but do not name a different coded manifestation. Check documentation if the complication type is unclear.
Do not use for
Do not use A36.89 for uncomplicated diphtheria or for a complication that has its own more specific ICD-10-CM code. Do not assign it when the chart does not establish a diphtheritic cause.
Coding tip
Confirm the provider’s wording and code the most specific diphtheria complication available before defaulting to A36.89.