ICD-10 Code B67.31 – Echinococcus granulosus infection, thyroid gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B67.31 – Echinococcus granulosus infection, thyroid gland
What it is
This code identifies hydatid disease caused by Echinococcus granulosus involving the thyroid gland. Use it when documentation specifies thyroid involvement by this parasitic infection.
Clinical signs
Clinical features vary; refer to documentation. Thyroid involvement may present as a neck mass, thyroid enlargement, or compressive symptoms, but imaging or pathology should support the site-specific diagnosis.
When to use this code
Use B67.31 when the record clearly states Echinococcus granulosus infection of the thyroid gland. It is appropriate for confirmed thyroid hydatid cysts or other documented thyroid involvement by this organism. If the site is not specified, check documentation before coding.
Do not use for
Do not use this code for nonspecific echinococcosis without thyroid involvement, or for thyroid masses with no documented parasitic cause. Check documentation if the diagnosis only says cyst, goiter, or thyroid nodule.
Coding tip
Code the organism and anatomic site exactly as documented; if either is unclear, query the provider.