U00-U49Not billable, use a more specific code below
Provisional assignment of new diseases of uncertain etiology or emergency use (U00-U49)
chapter 22: Codes for Special Purposes
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Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Lists special-purpose U codes, U07.0 vaping-related disorder, U07.1 COVID-19, and U09.9 post COVID-19 condition, with guidance referenced to Sections I.C.1 and I.C.10.
All codes under U00-U49
U00-U49 can't be used on a claim. Pick a billable code below; grey headings group them.
U00-U49 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.