Provisional assignment of new diseases of uncertain etiology or emergency use
5 codes in this section
About Section U00-U49
Section U00-U49 (U00-U49) covers provisional assignment of new diseases of uncertain etiology or emergency use. It sits within the Codes for special purposes chapter (U00-U85). This section contains 5 ICD-10-CM codes, 3 billable diagnoses you can submit on a claim, and 2 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on July 16, 2026.
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