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S83.121

Non-billable

Posterior subluxation of proximal end of tibia, right knee

S83.121 is the ICD-10-CM code for Posterior subluxation of proximal end of tibia, right knee. It is a non-billable category code — use a more specific child code such as S83.121A for billing.

Status
Header (non-billable)
Chapter
S00-T88
Parent
S83.12
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 S83.121?
S83.121 is the ICD-10-CM code for "Posterior subluxation of proximal end of tibia, right knee". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
Is S83.121 a billable code?
No — S83.121 is a non-billable header code. Use a more specific child code (such as S83.121A) for billing.
What are the subcodes of S83.121?
S83.121 has 3 more specific child codes, including S83.121A, S83.121D, S83.121S.

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

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