MCMedicalCodingSoftware
S66.117A

S66.117A: Strain of flexor muscle, fascia and tendon of left little finger at wrist and hand level, initial encounter

Billable / specific codeICD-10-CMleft

S66.117A is a billable, specific ICD-10-CM code for strain of flexor muscle, fascia and tendon of left little finger at wrist and hand level, initial encounter. It is valid for submission on a claim.

Check S66.117A with the rest of the claim: free scrubber

7th character "A": initial encounter

The appropriate 7th character is to be added to each code from category S66

A
initial encounter
D
subsequent encounter
S
sequela

Excludes2 inherited from the categories above S66.117A

Not part of this code, but both may be coded when both are present.

Written on S66.1: Injury of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand level

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

Written on S66: Injury of muscle, fascia and tendon at wrist and hand level

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

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

S66.117A is named in 5 Medicare coverage policies: 5 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A53058Billing and Coding: Home Health Physical Therapy
  • A53065Billing and Coding: Outpatient Physical Therapy
  • A56787Billing and Coding: Nonvascular Extremity Ultrasound
  • A57079Billing and Coding: Injections - Tendon, Ligament, and Ganglion Cyst

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under S66.117

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.