Right posterior thorax blister
Right posterior thorax blister with infection
S20.421A is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Short description: Blister (nonthermal) of right back wall of thorax, init
The 2023 edition of ICD-10-CM S20.421A became effective on October 1, 2022.
This is the American ICD-10-CM version of S20.421A – other international versions of ICD-10 S20.421A may differ.