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ICD-10-CM Codes
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S00-T88
Injury, poisoning and certain other consequences of external causes
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S60-S69
Injuries to the wrist, hand and fingers
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S66-
Injury of muscle, fascia and tendon at wrist and hand level
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2021 ICD-10-CM Diagnosis Code S66.401A
2021 ICD-10-CM Diagnosis Code S66.401A
Unspecified injury of intrinsic muscle, fascia and tendon of right thumb at wrist and hand level, initial encounter
2016 2017 2018 2019 2020 2021 Billable/Specific Code
- S66.401A is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- Short description: Unsp inj intrinsic musc/fasc/tend r thm at wrs/hnd lv, init
- The 2021 edition of ICD-10-CM S66.401A became effective on October 1, 2020.
- This is the American ICD-10-CM version of S66.401A - other international versions of ICD-10 S66.401A may differ.
The following code(s) above
S66.401A 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
S66.401A:
- S00-T88
2021 ICD-10-CM Range S00-T88
Injury, poisoning and certain other consequences of external causesNote- 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
Use Additional- code to identify any retained foreign body, if applicable (Z18.-)
- S60-S69
2021 ICD-10-CM Range S60-S69
Injuries to the wrist, hand and fingers
- S66
ICD-10-CM Diagnosis Code S66
Injury of muscle, fascia and tendon at wrist and hand level
2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
Code Also- any associated open wound (S61.-)
Type 2 Excludes- sprain of joints and ligaments of wrist and hand (S63.-)
- Right thumb intrinsic muscle injury
ICD-10-CM S66.401A is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
- 913 Traumatic injury with mcc
- 914 Traumatic injury without mcc
- 963 Other multiple significant trauma with mcc
- 964 Other multiple significant trauma with cc
- 965 Other multiple significant trauma without cc/mcc
Convert S66.401A 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 S66.401A
S66.399 Other injury of extensor muscle, fascia and tendon of unspecified finger at wrist and hand level
S66.4 Injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand level
S66.40 Unspecified injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand level
S66.401 Unspecified injury of intrinsic muscle, fascia and tendon of right thumb at wrist and hand level
S66.401A
…… initial encounter
S66.402 Unspecified injury of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level
S66.409 Unspecified injury of intrinsic muscle, fascia and tendon of unspecified thumb at wrist and hand level
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
