2021 ICD-10-CM Code S20.323D

Blister (nonthermal) of bilateral front wall of thorax, subsequent encounter

Version 2021

Valid for Submission

ICD-10:S20.323D
Short Description:Blister (nonthermal) of bilateral front wall of thorax, subs
Long Description:Blister (nonthermal) of bilateral front wall of thorax, subsequent encounter

Code Classification

  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Injuries to the thorax (S20-S29)
      • Superficial injury of thorax (S20)

S20.323D is a billable diagnosis code used to specify a medical diagnosis of blister (nonthermal) of bilateral front wall of thorax, subsequent encounter. The code S20.323D is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions. The code is exempt from present on admission (POA) reporting for inpatient admissions to general acute care hospitals.

S20.323D is a subsequent encounter code, includes a 7th character and should be used after the patient has completed active treatment for a condition like blister (nonthermal) of bilateral front wall of thorax. According to ICD-10-CM Guidelines a "subsequent encounter" occurs when the patient is receiving routine care for the condition during the healing or recovery phase of treatment. Subsequent diagnosis codes are appropriate during the recovery phase, no matter how many times the patient has seen the provider for this condition. If the provider needs to adjust the patient's care plan due to a setback or other complication, the encounter becomes active again.

Coding Guidelines

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:

New 2021 ICD-10 Code

S20.323D 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).

Present on Admission (POA)

S20.323D is exempt from POA reporting - The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement. Review other POA exempt codes here.

CMS POA Indicator Options and Definitions
POA Indicator CodePOA Reason for CodeCMS will pay the CC/MCC DRG?
YDiagnosis was present at time of inpatient admission.YES
NDiagnosis was not present at time of inpatient admission.NO
UDocumentation insufficient to determine if the condition was present at the time of inpatient admission.NO
WClinically undetermined - unable to clinically determine whether the condition was present at the time of inpatient admission.YES
1Unreported/Not used - Exempt from POA reporting. NO

Replacement Code

S20323D replaces the following previously assigned ICD-10 code(s):

Code History

  • FY 2021 - Code Added, effective from 10/1/2020 through 9/30/2021