ICD-10-CM Codes
S00-T88 Injury, poisoning and certain other consequences of external causes
T66-T78 Other and unspecified effects of external causes
T66- Radiation sickness, unspecified
2021 ICD-10-CM Diagnosis Code T66.XXXS

2021 ICD-10-CM Diagnosis Code T66.XXXS

Radiation sickness, unspecified, sequela

2016

2017

2018

2019

2020

2021

Billable/Specific Code

POA Exempt

T66.XXXS is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2021 edition of ICD-10-CM T66.XXXS became effective on October 1, 2020.
This is the American ICD-10-CM version of T66.XXXS - other international versions of ICD-10 T66.XXXS may differ.

The following code(s) above T66.XXXS contain annotation back-references

Annotation Back-References

In this context, annotation back-references refer to codes that contain:

Applicable To annotations, or
Code Also annotations, or
Code First annotations, or
Excludes1 annotations, or
Excludes2 annotations, or
Includes annotations, or
Note annotations, or
Use Additional annotations

that may be applicable to T66.XXXS:

S00-T88
2021 ICD-10-CM Range S00-T88
Injury, poisoning and certain other consequences of external causes
Note
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
Type 1 Excludes
- birth trauma (P10-P15)
- obstetric trauma (O70-O71)
Use Additional
- code to identify any retained foreign body, if applicable (Z18.-)
Injury, poisoning and certain other consequences of external causes
T66
ICD-10-CM Diagnosis Code T66
Radiation sickness, unspecified
Type 1 Excludes
- specified adverse effects of radiation, such as:
- burns (T20-T31)
- leukemia (C91-C95)
- radiation gastroenteritis and colitis (K52.0)
- radiation pneumonitis (J70.0)
- radiation related disorders of the skin and subcutaneous tissue (L55-L59)
- sunburn (L55.-)
Radiation sickness, unspecified

Approximate Synonyms

Late effect of radiation

Present On Admission

POA Help

"Present On Admission" is defined as present at the time the order for inpatient admission occurs — conditions that develop during an outpatient encounter, including emergency department, observation, or outpatient surgery, are considered POA.

T66.XXXS is considered exempt from POA reporting.

ICD-10-CM T66.XXXS is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):

922 Other injury, poisoning and toxic effect diagnoses with mcc
923 Other injury, poisoning and toxic effect diagnoses without mcc

Convert T66.XXXS to ICD-9-CM

Code History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change

ICD-10-CM Codes Adjacent To T66.XXXS

T65.93XA …… initial encounter

T65.93XD …… subsequent encounter

T65.93XS …… sequela

T65.94 Toxic effect of unspecified substance, undetermined

T65.94XA …… initial encounter

T65.94XD …… subsequent encounter

T65.94XS …… sequela

T66 Radiation sickness, unspecified

T66.XXXA Radiation sickness, unspecified, initial encounter

T66.XXXD Radiation sickness, unspecified, subsequent encounter

T66.XXXS Radiation sickness, unspecified, sequela

T67 Effects of heat and light

T67.0 Heatstroke and sunstroke

T67.01 Heatstroke and sunstroke

T67.01XA …… initial encounter

T67.01XD …… subsequent encounter

T67.01XS …… sequela

T67.02 Exertional heatstroke

T67.02XA …… initial encounter

T67.02XD …… subsequent encounter

T67.02XS …… sequela

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.