ICD-10 Code for Thyroiditis
The ICD-10-CM code for thyroiditis is E06.9 — Thyroiditis, unspecified. This is the code the Alphabetic Index gives for thyroiditis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
E06.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which thyroiditis code should you use?
The Alphabetic Index lists 9 codes under Thyroiditis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| acute | E06.0 | Acute thyroiditis | |
| autoimmune | E06.3 | Autoimmune thyroiditis | |
| chronic | E06.5 | Other chronic thyroiditis | |
| de Quervain's | E06.1 | Subacute thyroiditis | |
| drug-induced | E06.4 | Drug-induced thyroiditis | |
| fibrous | E06.5 | Other chronic thyroiditis | |
| giant-cell | E06.1 | Subacute thyroiditis | |
| granulomatous | E06.1 | Subacute thyroiditis | |
| Hashimoto's | E06.3 | Autoimmune thyroiditis | |
| iatrogenic | E06.4 | Drug-induced thyroiditis | |
| ligneous | E06.5 | Other chronic thyroiditis | |
| lymphocytic | E06.3 | Autoimmune thyroiditis | |
| lymphoid | E06.3 | Autoimmune thyroiditis | |
| lymphomatous | E06.3 | Autoimmune thyroiditis | |
| nonsuppurative | E06.1 | Subacute thyroiditis | |
| postpartum, puerperal | O90.5 | Postpartum thyroiditis | |
| pseudotuberculous | E06.1 | Subacute thyroiditis | |
| pyogenic | E06.0 | Acute thyroiditis | |
| radiation | E06.4 | Drug-induced thyroiditis | |
| Riedel's | E06.5 | Other chronic thyroiditis | |
| subacute | E06.1 | Subacute thyroiditis | |
| suppurative | E06.0 | Acute thyroiditis | |
| tuberculous | A18.81 | Tuberculosis of thyroid gland | |
| viral | E06.1 | Subacute thyroiditis | |
| woody | E06.5 | Other chronic thyroiditis |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources