2027 ICD-10-CM Diagnosis Code W90Exposure to other nonionizing radiation

ICD-10-CM Codes›V01–Y99›W85-W99›W90

ICD-10-CM W90
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

W90 is a non-billable ICD-10-CM category code for exposure to other nonionizing radiation, so it cannot be submitted on claims. Use a more specific code from this category instead, such as W90.0XXA, W90.0XXD, W90.0XXS, and W90.1XXA.

Code Identity

ICD-10-CM Code
W90
Billable Status
No — Non-Billable Category
Code Describes
Exposure to other nonionizing radiation
Short Description
Exposure to other nonionizing radiation
Same as the full description in the CMS dataset.
Chapter
W85-W99
Exposure to electric current, radiation and extreme ambient air temperature and pressure

Code Classification

ChapterV01–Y99External causes of morbidity and mortality
SectionW85-W99Exposure to electric current, radiation and extreme ambient air temperature and pressure
CategoryW90Exposure to other nonionizing radiation
This CodeW90Exposure to other nonionizing radiation

Specific Coding for Exposure to other nonionizing radiationOverview

Non-specific codes like W90 require more characters. Use one of these billable codes instead:

  • W90.0 for Exposure to radiofrequency

  • W90.1 for Exposure to infrared radiation

  • W90.2 for Exposure to laser radiation

  • W90.8 for Exposure to other nonionizing radiation

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to W90: its own notes plus those printed at block W85-W99 and Chapter 20. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Block W85-W99 Exposure to electric current, radiation and extreme ambient air temperature and pressure applies to 99 codes
  • exposure to:
  • failure in dosage of radiation or temperature during surgical and medical care (Y63.2-Y63.5)
  • lightning (T75.0-)
  • natural cold (X31)
  • natural heat (X30)
  • natural radiation NOS (X39)
  • radiological procedure and radiotherapy (Y84.2)
  • sunlight (X32)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

  • exposure to sunlight (X32)

Notes

General instructions on how these codes are used.

From Chapter 20 (V00-Y99) External causes of morbidity and mortality applies to 7,461 codes
  • This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

  • The appropriate 7th character is to be added to each code from category W90
Values for category W90 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name W90, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming W90: they are not reported together with it, unless the two conditions are unrelated.

  • X39.0 Exposure to natural radiation
    exposure to man-made radiation (W88-W90) names W88-W90, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming W90: its condition is not part of those codes, and both may be reported when the patient has both.

  • Z77.123 Contact with and (suspected) exposure to radon and other naturally occurring radiation
    radiation exposure as the cause of a confirmed condition (W88-W90, X39.0-) names W88-W90, which includes this code

Use Additional Code 7

These codes say to use an additional code from the note, and W90 is one of the codes named.

  • L57 Skin changes due to chronic exposure to nonionizing radiation
    code to identify the source of the ultraviolet radiation (W89), or other nonionizing radiation (W90)
  • L58 Radiodermatitis
    code to identify the source of the radiation (W88, W90)
  • G62.82 Radiation-induced polyneuropathy
    external cause code (W88-W90, X39.0-) to identify cause names W88-W90, which includes this code
  • J70.0 Acute pulmonary manifestations due to radiation
    code (W88-W90, X39.0-) to identify the external cause names W88-W90, which includes this code
  • J70.1 Chronic and other pulmonary manifestations due to radiation
    code (W88-W90, X39.0-) to identify the external cause names W88-W90, which includes this code
  • K12.33 Oral mucositis (ulcerative) due to radiation
    external cause code (W88-W90, X39.0-) to identify cause names W88-W90, which includes this code
  • M27.2 Inflammatory conditions of jaws
    code (W88-W90, X39.0) to identify radiation, if radiation-induced names W88-W90, which includes this code

Patient EducationClinical

Electromagnetic Fields

Electric and magnetic fields (EMFs), also called radiation, are areas of energy that surround electrical devices. Everyday sources of EMFs include:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About W90Overview

What is the ICD-10 code for exposure to other nonionizing radiation?

W90 is the ICD-10-CM category for exposure to other nonionizing radiation, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is W90 (Exposure to other nonionizing radiation) a billable code?

No. This is a category header that groups the codes for exposure to other nonionizing radiation, and headers cannot be submitted on claims. Claims for exposure to other nonionizing radiation need a more specific code from this category, such as W90.0XXA, W90.0XXD, and W90.0XXS.

Can W90 be reported with a code from T75.0?

Not as a rule. The Excludes1 note at block W85-W99, which applies to W90, lists "lightning (T75.0-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).