Y66
✓ Billable
Nonadministration of surgical and medical care
ICD-10-CM · FY2026 · External Causes of Morbidity
Code
Y66
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
External Causes of Morbidity
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code Y66?
ICD-10-CM code Y66 represents Nonadministration of surgical and medical care. It is a billable diagnosis code in the External Causes of Morbidity chapter, effective October 1, 2025 – September 30, 2026.
Is Y66 billable?
Yes. Y66 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is Y66 in?
Y66 belongs to the External Causes of Morbidity chapter (V00–Y99) of ICD-10-CM.
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