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ICD-10-CM · FY 2026 APRIL UPDATE

S83.4

Sprain of collateral ligament of knee

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
S83.40Sprain of unspecified collateral ligament of kneeCategory
S83.401Sprain of unspecified collateral ligament of right kneeCategory
S83.401ASprain of unspecified collateral ligament of right knee, initial encounterBillable
S83.401DSprain of unspecified collateral ligament of right knee, subsequent encounterBillable
S83.401SSprain of unspecified collateral ligament of right knee, sequelaBillable
S83.402Sprain of unspecified collateral ligament of left kneeCategory
S83.402ASprain of unspecified collateral ligament of left knee, initial encounterBillable
S83.402DSprain of unspecified collateral ligament of left knee, subsequent encounterBillable
S83.402SSprain of unspecified collateral ligament of left knee, sequelaBillable
S83.409Sprain of unspecified collateral ligament of unspecified kneeCategory
S83.409ASprain of unspecified collateral ligament of unspecified knee, initial encounterBillable
S83.409DSprain of unspecified collateral ligament of unspecified knee, subsequent encounterBillable
S83.409SSprain of unspecified collateral ligament of unspecified knee, sequelaBillable
S83.41Sprain of medial collateral ligament of kneeCategory
S83.411Sprain of medial collateral ligament of right kneeCategory
S83.411ASprain of medial collateral ligament of right knee, initial encounterBillable
S83.411DSprain of medial collateral ligament of right knee, subsequent encounterBillable
S83.411SSprain of medial collateral ligament of right knee, sequelaBillable
S83.412Sprain of medial collateral ligament of left kneeCategory
S83.412ASprain of medial collateral ligament of left knee, initial encounterBillable
S83.412DSprain of medial collateral ligament of left knee, subsequent encounterBillable
S83.412SSprain of medial collateral ligament of left knee, sequelaBillable
S83.419Sprain of medial collateral ligament of unspecified kneeCategory
S83.419ASprain of medial collateral ligament of unspecified knee, initial encounterBillable
S83.419DSprain of medial collateral ligament of unspecified knee, subsequent encounterBillable
S83.419SSprain of medial collateral ligament of unspecified knee, sequelaBillable
S83.42Sprain of lateral collateral ligament of kneeCategory
S83.421Sprain of lateral collateral ligament of right kneeCategory
S83.421ASprain of lateral collateral ligament of right knee, initial encounterBillable
S83.421DSprain of lateral collateral ligament of right knee, subsequent encounterBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.