Is chronic thyroiditis considered hashimoto disease?

Maybe. Hashimoto's is a form of chronic thyroiditis, but not all thyroiditis is hashimoto's.
Hashimoto. Hashimoto's thyroiditis is chronic autoimmune thyroiditis. This is the most common form of thyroiditis. Other forms of thyroiditis include drug-induced (amiodarone) which can also be chronic. Infectious and post-partum thyroiditis tend to be more acute.