ICDcodes.org
FY2027

S66.109 — Unspecified injury of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level

Not billable

Is S66.109 billable?

No — S66.109 is a non-billable header code. S66.109 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 3 billable codes beneath S66.109.

S66.109 at a glance

CodeS66.109
DescriptionUnspecified injury of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level
BillableNo — header code
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

How is S66.109 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to S66.109. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • Injury › muscle › finger › flexor › hand level

Use additional code — inherited from Chapter 19

Report an additional code alongside S66.109 to fully describe the condition. S66.109 is sequenced first.

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

Excludes2 — not included here — inherited from Chapter 19

The conditions below are not part of S66.109, but a patient may have both at the same time. When documentation supports it, S66.109 and the excluded code may both be reported.

  • birth trauma (P10-P15)
  • obstetric trauma (O70-O71)

Excludes2 — not included here — inherited from S60-S69

The conditions below are not part of S66.109, but a patient may have both at the same time. When documentation supports it, S66.109 and the excluded code may both be reported.

  • burns and corrosions (T20-T32)
  • frostbite (T33-T34)
  • insect bite or sting, venomous (T63.4)

Excludes2 — not included here — inherited from S66

The conditions below are not part of S66.109, but a patient may have both at the same time. When documentation supports it, S66.109 and the excluded code may both be reported.

  • sprain of joints and ligaments of wrist and hand (S63.-)

Excludes2 — not included here — inherited from S66.1

The conditions below are not part of S66.109, but a patient may have both at the same time. When documentation supports it, S66.109 and the excluded code may both be reported.

  • Injury of long flexor muscle, fascia and tendon of thumb at wrist and hand level (S66.0-)

Code also — inherited from S66

Two codes may be needed to describe the condition fully. Whether S66.109 is sequenced first depends on the reason for the encounter.

  • any associated open wound (S61.-)

What codes fall under S66.109? (3)

How long has S66.109 existed?

S66.109 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

What other codes are in the S66.10 family? (9)