2024 ICD-10-CM Diagnosis Code W31.9XXA

Contact with unspecified machinery, initial encounter

ICD-10-CM Code:
ICD-10 Code for:
Contact with unspecified machinery, initial encounter
Is Billable?
Yes - Valid for Submission
Code Navigator:

Code Classification

  • External causes of morbidity and mortality
    • Exposure to inanimate mechanical forces
      • Contact with other and unspecified machinery

W31.9XXA is a billable diagnosis code used to specify a medical diagnosis of contact with unspecified machinery, initial encounter. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024. The code is exempt from present on admission (POA) reporting for inpatient admissions to general acute care hospitals.

W31.9XXA is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like contact with unspecified machinery. 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.

Unspecified diagnosis codes like W31.9XXA are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Accident caused by collapse of machinery
  • Accident caused by explosion of, on, or in, machinery
  • Accident caused by fall from moving part of machinery
  • Accident caused by fall into moving part of machinery
  • Accident caused by falling object due to action of machinery
  • Accident caused by fire starting in or on machinery
  • Accident caused by heat energy release from machine
  • Accident caused by machinery
  • Accident caused by overturning of machinery
  • Accident due to mechanical fall without injury
  • Accident while carving stone
  • Accident while cutting stone
  • Accident while dressing stone surface
  • Accident while drilling stone
  • Accident while working with masonry
  • Accident while working with masonry
  • Accident while working with masonry
  • Accident while working with masonry
  • Accidental entrapment by machinery
  • Accidental fall involving machinery
  • Accidental mechanical suffocation caused by machinery
  • Accidental strangulation
  • Accidental strangulation
  • Accidental strangulation by clothing
  • Accidental strangulation by machinery
  • Accidental strangulation on clothing caught in machinery
  • Accidentally caught in machinery
  • Accidentally crushed by machinery
  • Accidentally cut or pierced by machinery
  • Accidentally drowned by machinery
  • Accidentally pinned under machinery
  • Accidentally run over by machinery
  • Accidentally struck by machinery
  • Accidentally thrown from machinery
  • Accidents caused by cutting and piercing instruments or objects
  • Contact with machinery
  • Injury due to machinery
  • Struck by falling machine equipment
  • Struck by falling object

Clinical Classification

Clinical CategoryCCSR Category CodeInpatient Default CCSROutpatient Default CCSR
External cause codes: intent of injury, accidental/unintentionalEXT020X - Not applicable.X - Not applicable.
External cause codes: machinery; initial encounterEXT006X - Not applicable.X - Not applicable.

Present on Admission (POA)

W31.9XXA 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 IndicatorReason 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 W31.9XXA to ICD-9-CM

  • ICD-9-CM Code: E919.9 - Machinery accident NOS
    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

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.