ICD-10-CM 2027
ICD-10 code for iatrogenic thyroiditis
From the official ICD-10-CM alphabetic index entry “Thyroiditis › iatrogenic”. Page updated September 29, 2026.
About coding iatrogenic thyroiditis
The ICD-10-CM code for iatrogenic thyroiditis is E06.4 (Drug-induced thyroiditis).
Within E06 (thyroiditis), E06.4 is specifically for drug-induced thyroiditis. Related codes cover acute thyroiditis (E06.0), subacute thyroiditis (E06.1), chronic thyroiditis with transient thyrotoxicosis (E06.2), autoimmune thyroiditis (E06.3), other chronic thyroiditis (E06.5) and unspecified (E06.9).
Use an additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about iatrogenic thyroiditis ICD-10 codes
What is the ICD-10 code for iatrogenic thyroiditis?
- E06.4 — Drug-induced thyroiditis.
Is E06.4 billable?
- Yes. E06.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E06.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E06.4 as a principal diagnosis.
Is E06.4 a CC or MCC?
- No. E06.4 is neither a CC nor an MCC under MS-DRG v44.0.