ICD-10 Code H93.21 – Auditory recruitment (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H93.21 – Auditory recruitment
What it is
Auditory recruitment is an abnormal increase in loudness perception, where sounds become uncomfortably loud over a short range. It is usually associated with cochlear hearing loss and can affect hearing comfort and sound tolerance.
Clinical signs
Patients may report sounds seeming suddenly too loud, especially in one ear. Clinical features vary; refer to documentation. Audiology testing may show reduced loudness tolerance or abnormal loudness growth.
When to use this code
Use this code when the record specifically documents auditory recruitment or a clinician identifies abnormal loudness growth. It is appropriate in audiology or otology notes when the finding is part of the assessment. If the chart only says hearing loss without recruitment, do not assume this code.
Do not use for
Do not use it for general hearing loss, tinnitus, or sound sensitivity unless recruitment is explicitly documented. Check documentation if the note describes hyperacusis or another auditory complaint instead.
Coding tip
Code H93.21 only when the provider links the finding to recruitment, not just to hearing difficulty or ear discomfort.