2021 ICD-10-CM Diagnosis Code S66.401S

Unspecified injury of intrinsic muscle, fascia and tendon of right thumb at wrist and hand level, sequela

    2016 2017 2018 2019 2020 2021 Billable/Specific Code POA Exempt
  • S66.401S is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Unsp inj intrns musc/fasc/tend r thm at wrs/hnd lv, sequela
  • The 2021 edition of ICD-10-CM S66.401S became effective on October 1, 2020.
  • This is the American ICD-10-CM version of S66.401S - other international versions of ICD-10 S66.401S may differ.
The following code(s) above S66.401S 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 S66.401S:
  • 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
    Use Additional
    • code to identify any retained foreign body, if applicable (Z18.-)
    Injury, poisoning and certain other consequences of external causes
  • S60-S69
    2021 ICD-10-CM Range S60-S69

    Injuries to the wrist, hand and fingers

    Type 2 Excludes
    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.-)
    Injury of muscle, fascia and tendon at wrist and hand level
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.
  • S66.401S is considered exempt from POA reporting.
ICD-10-CM S66.401S is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 913 Traumatic injury with mcc
  • 914 Traumatic injury without mcc

Convert S66.401S 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 S66.401S
S66.398S …… sequela
S66.399 Other injury of extensor muscle, fascia and tendon of unspecified finger at wrist and hand level
S66.399A …… initial encounter
S66.399D …… subsequent encounter
S66.399S …… sequela
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
S66.401D …… subsequent encounter
S66.401S …… sequela
S66.402 Unspecified injury of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level
S66.402A …… initial encounter
S66.402D …… subsequent encounter
S66.402S …… sequela
S66.409 Unspecified injury of intrinsic muscle, fascia and tendon of unspecified thumb at wrist and hand level
S66.409A …… initial encounter
S66.409D …… subsequent encounter
S66.409S …… sequela
S66.41 Strain of intrinsic muscle, fascia and tendon of thumb at wrist and hand level
S66.411 Strain of intrinsic muscle, fascia and tendon of right 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.