S66.509 — Unspecified injury of intrinsic muscle, fascia and tendon of unspecified finger at wrist and hand level
S66.509 is a non-billable header ICD-10-CM code for unspecified injury of intrinsic 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
S66.509 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 S66.509 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 S66.509.
- Injury›muscle›finger›intrinsic
Code to one of these instead S66.509
3 child codes. Green means billable.
- S66.509AUnspecified injury of intrinsic muscle, fascia and tendon of unspecified finger at wrist and hand level, initial encounter
- S66.509DUnspecified injury of intrinsic muscle, fascia and tendon of unspecified finger at wrist and hand level, subsequent encounter
- S66.509SUnspecified injury of intrinsic muscle, fascia and tendon of unspecified finger at wrist and hand level, sequela
Related codes at this level
Codes that share S66.50. If S66.509 is not quite right, the correct code is usually one of these.
- S66.500Unspecified injury of intrinsic muscle, fascia and tendon of right index finger at wrist and hand level
- S66.501Unspecified injury of intrinsic muscle, fascia and tendon of left index finger at wrist and hand level
- S66.502Unspecified injury of intrinsic muscle, fascia and tendon of right middle finger at wrist and hand level
- S66.503Unspecified injury of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level
- S66.504Unspecified injury of intrinsic muscle, fascia and tendon of right ring finger at wrist and hand level
- S66.505Unspecified injury of intrinsic muscle, fascia and tendon of left ring finger at wrist and hand level
- S66.506Unspecified injury of intrinsic muscle, fascia and tendon of right little finger at wrist and hand level
- S66.507Unspecified injury of intrinsic muscle, fascia and tendon of left little finger at wrist and hand level
- S66.508Unspecified injury of intrinsic muscle, fascia and tendon of other finger at wrist and hand level
Questions about S66.509
- Is S66.509 a billable ICD-10-CM code?
- No. S66.509 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does S66.509 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).