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ICD-10-CM Code T66
Radiation sickness, unspecified

NON-BILLABLE
Non-Billable Code
Non-Billable means the code is not sufficient justification for admission to an acute care hospital when used a principal diagnosis. Use a child code to capture more detail.
7th Character Required
7th Character Required
Code requires 7th Character Extension identifier. This 7th Character usually captures Episode of Care information, such as "Initial Encounter," "Subsquent Encounter," or "Sequela."
| ICD-10 from 2011 - 2016

ICD Code T66 is a non-billable code. To code a diagnosis of this type, you must use specify a 7th character that describes the diagnosis 'radiation sickness, unspecified' in more detail. The 7th characters that can be added, and the resulting billable codes, are as follows:


7th Digit Billable Code 7th Digit Specifies
A T66.XXXA initial encounter
D T66.XXXD subsequent encounter
S T66.XXXS sequela

What is 7th Character Extension?

For codes less than 6 characters that require a 7th character a placeholder 'X' should be assigned for all characters less than 6. The 7th character must always be the 7th position of a code. E.g. The ICD-10-CM code T67.4 (Heat exhaustion due to salt depletion) requires an Episode of Care identifier. T67.4XXA Initial Encounter or T67.4XXD Subsequent Encounter. More Info

The ICD code T66 is used to code Acute radiation syndrome

Acute radiation syndrome (ARS), also known as radiation poisoning, radiation sickness or radiation toxicity, is a collection of health effects which present within 24 hours of exposure to high amounts of ionizing radiation. The radiation causes cellular degradation due to damage to DNA and other key molecular structures within the cells in various tissues; this destruction, particularly as it affects ability of cells to divide normally, in turn causes the symptoms. The symptoms can begin within one or two hours and may last for several months. The terms refer to acute medical problems rather than ones that develop after a prolonged period.

Specialty: Toxicology
MeSH Code: D011832
ICD 9 Code: 990

A Japanese girl presenting the effects of radiation sickness.

Source: Wikipedia

Coding Notes for T66 Info for medical coders on how to properly use this ICD-10 code

Code Type-1 Excludes:
Type-1 Excludes
Type-1 Excludes mean the conditions excluded are mutually exclusive and should never be coded together. Excludes 1 means "do not code here."
Specified adverse effects of radiation, such as:
Burns - instead, use Section T20-T31
Leukemia - instead, use Section C91-C95
Radiation gastroenteritis and colitis - instead, use code K52.0
Radiation pneumonitis - instead, use code J70.0
Radiation related disorders of the skin and subcutaneous tissue - instead, use Section L55-L59
Sunburn - instead, use code L55.-
7th Character Extension Notes:

What is 7th Character Extension?

For codes less than 6 characters that require a 7th character a placeholder 'X' should be assigned for all characters less than 6. The 7th character must always be the 7th position of a code. E.g. The ICD-10-CM code T67.4 (Heat exhaustion due to salt depletion) requires an Episode of Care identifier. T67.4XXA Initial Encounter or T67.4XXD Subsequent Encounter. More Info
The appropriate 7th character is to be added to code See Code T66

Related Concepts SNOMET-CT

  • Infertility due to radiation (finding)
  • Acute radiation otitis externa (disorder)

Coding Advice SNOMET-CT

  • Episode of care information needed
  • Possible requirement for an external cause code

ICD-10-CM Alphabetical Index References for 'T66 - Radiation sickness, unspecified'

The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code T66. Click on any term below to browse the alphabetical index.


** This Document Provided By ICD.Codes **
Source: http://icd.codes/icd10cm/T66