Back to ICD-10 library
ICD-10-CM · FY 2026 APRIL UPDATE

M66.2

Spontaneous rupture of extensor tendons

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
M66.20Spontaneous rupture of extensor tendons, unspecified siteBillable
M66.21Spontaneous rupture of extensor tendons, shoulderCategory
M66.211Spontaneous rupture of extensor tendons, right shoulderBillable
M66.212Spontaneous rupture of extensor tendons, left shoulderBillable
M66.219Spontaneous rupture of extensor tendons, unspecified shoulderBillable
M66.22Spontaneous rupture of extensor tendons, upper armCategory
M66.221Spontaneous rupture of extensor tendons, right upper armBillable
M66.222Spontaneous rupture of extensor tendons, left upper armBillable
M66.229Spontaneous rupture of extensor tendons, unspecified upper armBillable
M66.23Spontaneous rupture of extensor tendons, forearmCategory
M66.231Spontaneous rupture of extensor tendons, right forearmBillable
M66.232Spontaneous rupture of extensor tendons, left forearmBillable
M66.239Spontaneous rupture of extensor tendons, unspecified forearmBillable
M66.24Spontaneous rupture of extensor tendons, handCategory
M66.241Spontaneous rupture of extensor tendons, right handBillable
M66.242Spontaneous rupture of extensor tendons, left handBillable
M66.249Spontaneous rupture of extensor tendons, unspecified handBillable
M66.25Spontaneous rupture of extensor tendons, thighCategory
M66.251Spontaneous rupture of extensor tendons, right thighBillable
M66.252Spontaneous rupture of extensor tendons, left thighBillable
M66.259Spontaneous rupture of extensor tendons, unspecified thighBillable
M66.26Spontaneous rupture of extensor tendons, lower legCategory
M66.261Spontaneous rupture of extensor tendons, right lower legBillable
M66.262Spontaneous rupture of extensor tendons, left lower legBillable
M66.269Spontaneous rupture of extensor tendons, unspecified lower legBillable
M66.27Spontaneous rupture of extensor tendons, ankle and footCategory
M66.271Spontaneous rupture of extensor tendons, right ankle and footBillable
M66.272Spontaneous rupture of extensor tendons, left ankle and footBillable
M66.279Spontaneous rupture of extensor tendons, unspecified ankle and footBillable
M66.28Spontaneous rupture of extensor tendons, other siteBillable

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.