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S66.099

Non-billable

Other specified injury of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level

S66.099 is the ICD-10-CM code for Other specified injury of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level. It is a non-billable category code — use a more specific child code such as S66.099A for billing.

Status
Header (non-billable)
Chapter
S00-T88
Parent
S66.09
Subcodes
3
Edition
FY2026

S00-T88 Injury, poisoning and certain other consequences of external causes

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code S66.099?
S66.099 is the ICD-10-CM code for "Other specified injury of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
Is S66.099 a billable code?
No — S66.099 is a non-billable header code. Use a more specific child code (such as S66.099A) for billing.
What are the subcodes of S66.099?
S66.099 has 3 more specific child codes, including S66.099A, S66.099D, S66.099S.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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