2024 ICD-10-CM Diagnosis Code W45.0XXA

Nail entering through skin, initial encounter

ICD-10-CM Code:
Short Description:
Nail entering through skin, initial encounter
Is Billable?
Yes - Valid for Submission
Code Navigator:

Code Classification

  • External causes of morbidity and mortality
    • Exposure to inanimate mechanical forces
      • Foreign body or object entering through skin

W45.0XXA is a billable diagnosis code used to specify a medical diagnosis of nail entering through skin, 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.

W45.0XXA is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like nail entering through skin. 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.

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 nail
  • Accident caused by sharp pointed object
  • Metal nail puncture wound of skin
  • Metal nail wound
  • Metal nail wound
  • Metal nail wound
  • Metal nail wound
  • Metal nail wound of great toe
  • Metal nail wound of thumb
  • Metal nail wound of toe
  • Nail wound of ankle
  • Nail wound of axilla
  • Nail wound of buttock
  • Nail wound of calf
  • Nail wound of dorsum of hand
  • Nail wound of elbow
  • Nail wound of foot
  • Nail wound of foot
  • Nail wound of foot
  • Nail wound of forearm
  • Nail wound of hand
  • Nail wound of hand
  • Nail wound of head
  • Nail wound of head
  • Nail wound of head and neck
  • Nail wound of heel
  • Nail wound of hip
  • Nail wound of knee
  • Nail wound of lower leg
  • Nail wound of neck
  • Nail wound of neck
  • Nail wound of palm of hand
  • Nail wound of shin
  • Nail wound of shoulder
  • Nail wound of sole of foot
  • Nail wound of thigh
  • Nail wound of trunk
  • Nail wound of trunk
  • Nail wound of trunk
  • Nail wound of upper arm
  • Nail wound of wrist
  • Open wound foot, plantar
  • Open wound of hand, dorsum
  • Puncture wound of skin
  • Superficial puncture wound
  • Wound due to nail device

Clinical Classification

Clinical CategoryCCSR Category CodeInpatient Default CCSROutpatient Default CCSR
External cause codes: cut/pierce; initial encounterEXT001X - Not applicable.X - Not applicable.
External cause codes: intent of injury, accidental/unintentionalEXT020X - Not applicable.X - Not applicable.

Present on Admission (POA)

W45.0XXA 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 W45.0XXA to ICD-9-CM

  • ICD-9-CM Code: E920.8 - Acc-cutting instrum NEC
    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.

Patient Education

Foreign Bodies

If you've ever gotten a splinter or had sand in your eye, you've had experience with a foreign body. A foreign body is something that is stuck inside you but isn't supposed to be there. You may inhale or swallow a foreign body, or you may get one from an injury to almost any part of your body. Foreign bodies are more common in small children, who sometimes stick things in their mouths, ears, and noses.

Some foreign bodies, like a small splinter, do not cause serious harm. Inhaled or swallowed foreign bodies may cause choking or bowel obstruction and may require medical care.

[Learn More in MedlinePlus]

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.