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S66.516D vs S66.517D

S66.516D (Strain of intrinsic muscle, fascia and tendon of right little finger at wrist and hand level, subsequent encounter) compared with S66.517D (Strain of intrinsic muscle, fascia and tendon of left little finger at wrist and hand level, subsequent encounter), from the official CMS tabular data. S66.516D and S66.517D code the same condition on opposite sides. MedCoder-derived

Relationship

Review

Laterality relationship

S66.516D
Right
Strain of intrinsic muscle, fascia and tendon of right little finger at wrist and hand level, subsequent encounter
S66.517D
Left
Strain of intrinsic muscle, fascia and tendon of left little finger at wrist and hand level, subsequent encounter

Same condition; these differ only in which side is documented.

These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.

Source: ICD-10-CM tabular list (laterality variant derived from the code title)

Can these codes be reported together?

Same condition, opposite side. S66.516D and S66.517D name the same condition on opposite sides of the body.

Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.

Side by side

S66.516DStrain of intrinsic muscle, fascia and tendon of right little finger at wrist and hand level, subsequent encounterS66.517DStrain of intrinsic muscle, fascia and tendon of left little finger at wrist and hand level, subsequent encounter
Billing statusBillableBillable
ClassificationS00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
DefinitionStrain of intrinsic muscle, fascia and tendon of right little finger at wrist and hand level, subsequent encounter is a billable ICD-10-CM diagnosis code (S66.516D).Strain of intrinsic muscle, fascia and tendon of left little finger at wrist and hand level, subsequent encounter is a billable ICD-10-CM diagnosis code (S66.517D).
7th characterThe appropriate 7th character is to be added to each code from category S66The appropriate 7th character is to be added to each code from category S66

Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources