S66.109 — Unspecified injury of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level
S66.109 is a non-billable header ICD-10-CM code for unspecified injury of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
The appropriate 7th character is to be added to each code from category S66
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Risk adjustment
S66.109 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
How S66.109 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to S66.109.
- Injury›muscle›finger›flexor›hand level
Code to one of these instead S66.109
3 child codes. Green means billable.
- S66.109AUnspecified injury of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level, initial encounter
- S66.109DUnspecified injury of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level, subsequent encounter
- S66.109SUnspecified injury of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level, sequela
Related codes at this level
Codes that share S66.10. If S66.109 is not quite right, the correct code is usually one of these.
- S66.100Unspecified injury of flexor muscle, fascia and tendon of right index finger at wrist and hand level
- S66.101Unspecified injury of flexor muscle, fascia and tendon of left index finger at wrist and hand level
- S66.102Unspecified injury of flexor muscle, fascia and tendon of right middle finger at wrist and hand level
- S66.103Unspecified injury of flexor muscle, fascia and tendon of left middle finger at wrist and hand level
- S66.104Unspecified injury of flexor muscle, fascia and tendon of right ring finger at wrist and hand level
- S66.105Unspecified injury of flexor muscle, fascia and tendon of left ring finger at wrist and hand level
- S66.106Unspecified injury of flexor muscle, fascia and tendon of right little finger at wrist and hand level
- S66.107Unspecified injury of flexor muscle, fascia and tendon of left little finger at wrist and hand level
- S66.108Unspecified injury of flexor muscle, fascia and tendon of other finger at wrist and hand level
Questions about S66.109
- Is S66.109 a billable ICD-10-CM code?
- No. S66.109 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does S66.109 sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the wrist, hand and fingers (S60-S69).