ICD-10-CM 2027
ICD-10 code for de Quervain's thyroiditis
From the official ICD-10-CM alphabetic index entry “Thyroiditis › de Quervain's”. Page updated September 29, 2026.
About coding de Quervain's thyroiditis
The ICD-10-CM code for de Quervain's thyroiditis is E06.1 (Subacute thyroiditis).
Within E06 (thyroiditis), E06.1 is specifically for subacute thyroiditis. Related codes cover acute thyroiditis (E06.0), chronic thyroiditis with transient thyrotoxicosis (E06.2), autoimmune thyroiditis (E06.3), drug-induced thyroiditis (E06.4), other chronic thyroiditis (E06.5) and unspecified (E06.9).
Don't report E06.1 together with the conditions in its Excludes1 note: autoimmune thyroiditis (E06.3).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Don't confuse with (Excludes1 for E06.1)
- autoimmune thyroiditis (E06.3)
Common questions about de Quervain's thyroiditis ICD-10 codes
What is the ICD-10 code for de Quervain's thyroiditis?
- E06.1 — Subacute thyroiditis.
Is E06.1 billable?
- Yes. E06.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E06.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E06.1 as a principal diagnosis.
Is E06.1 a CC or MCC?
- No. E06.1 is neither a CC nor an MCC under MS-DRG v44.0.