Other chronic thyroiditis

This code signifies a persistent inflammation of the thyroid gland that does not fit the criteria for Hashimoto's thyroiditis, Riedel's struma, or other specified forms of chronic thyroiditis. It represents a long-standing inflammatory process affecting thyroid function and structure.

Apply this code when documentation indicates chronic thyroiditis without further specification, or when the specific type of chronic thyroiditis is known but does not have a unique ICD-10-CM code (e.g., chronic lymphocytic thyroiditis not explicitly identified as Hashimoto's). Supporting documentation should clearly state "chronic thyroiditis" and rule out more specific forms.

• Do not use this code if Hashimoto's thyroiditis (E06.3) is documented.
• Ensure documentation specifies "chronic" to differentiate from acute or subacute forms.
• Consider sequencing this code after any underlying cause or associated conditions, if applicable.