W21.09XA - Struck by other hit or thrown ball, initial encounter

Version 2023
ICD-10:W21.09XA
Short Description:Struck by other hit or thrown ball, initial encounter
Long Description:Struck by other hit or thrown ball, initial encounter
Status: Valid for Submission
Version:ICD-10-CM 2023
Code Classification:
  • External causes of morbidity and mortality (V01–Y98)
    • Exposure to inanimate mechanical forces (W20-W49)
      • Striking against or struck by sports equipment (W21)

W21.09XA is a billable ICD-10 code used to specify a medical diagnosis of struck by other hit or thrown ball, initial encounter. The code is valid during the fiscal year 2023 from October 01, 2022 through September 30, 2023 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.

W21.09XA is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like struck by other hit or thrown ball. 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.

Present on Admission (POA)

W21.09XA 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

Convert to ICD-9 Code

Source ICD-10 CodeTarget ICD-9 Code
W21.09XAE917.0 - Sports acc w/o sub fall
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Code History