Valid for Submission
S20.323A is a billable diagnosis code used to specify a medical diagnosis of blister (nonthermal) of bilateral front wall of thorax, initial encounter. The code S20.323A is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.
S20.323A is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like blister (nonthermal) of bilateral front wall of thorax. According to ICD-10-CM Guidelines an "initial encounter" doesn't necessarily means "initial visit". The 7th character should be used when the patient is undergoing active treatment regardless if new or different providers saw the patient over the course of a treatment. The appropriate 7th character codes should also be used even if the patient delayed seeking treatment for a condition.
The appropriate 7th character is to be added to each code from block Superficial injury of thorax (S20). Use the following options for the aplicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
New 2021 ICD-10 Code
S20.323A is new to ICD-10 code set for the FY 2021, effective October 1, 2020. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2020. This is a new and revised code for the FY 2021 (October 1, 2020 - September 30, 2021).
Diagnostic Related Groups - MS-DRG Mapping
S20323A replaces the following previously assigned ICD-10 code(s):