ICD-10 Code J35.2 – Hypertrophy of adenoids (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J35.2 – Hypertrophy of adenoids
What it is
J35.2 identifies enlarged adenoids, the lymph tissue behind the nose. Use it when documentation states adenoid hypertrophy or enlarged adenoids without another more specific diagnosis.
Clinical signs
Common findings include nasal obstruction, mouth breathing, snoring, and a blocked or nasal voice. Clinical features vary; refer to documentation and any confirmed exam or imaging findings.
When to use this code
Use this code when the provider documents hypertrophy of adenoids as the diagnosis, especially in outpatient, ENT, or preoperative records. It may also fit when enlarged adenoids are the stated reason for symptoms or referral. If chronic infection or another condition is documented instead, code that condition rather than this one.
Do not use for
Do not use J35.2 for acute adenoiditis, tonsillar hypertrophy, or general upper airway congestion. Check documentation if the note describes infection, sleep apnea, or another cause of obstruction.
Coding tip
Code J35.2 only when adenoid enlargement is explicitly documented; if the record is vague, check documentation before assigning the code.