S66.412D

Strain of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level, subsequent encounter

Billable / specificPOA exempt

S66.412D is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Includes (from S66)

  • 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
  • Note: The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

Excludes2

Not included here — may be reported together when both conditions exist.

  • birth trauma (P10-P15) (from S66)
  • obstetric trauma (O70-O71) (from S66)
  • burns and corrosions (T20-T32) (from S66)
  • frostbite (T33-T34) (from S66)
  • insect bite or sting, venomous (T63.4) (from S66)
  • sprain of joints and ligaments of wrist and hand (S63.-) (from S66)

Use additional code

Add a code to identify the following, if applicable.

  • code to identify any retained foreign body, if applicable (Z18.-) (from S66)

Code also

An additional code may be needed.

  • any associated open wound (S61.-) (from S66)

7th character

The 7th character values that apply to this code (defined at S66). Use the placeholder "X" for missing positions.

CharacterMeaning
Ainitial encounter
Dsubsequent encounter
Ssequela

Parent code

  • S66.412Strain of intrinsic muscle, fascia and tendon of left thumb at wrist and hand levelNeeds 7th char

Related codes

  • S66.412AStrain of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level, initial encounterBillable
  • S66.412SStrain of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level, sequelaBillable

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