Provisional assignment of new diseases of uncertain etiology or emergency use (U00-U49) ICD-10-CM
The U00–U49 section covers provisional assignment of new diseases of uncertain etiology or emergency use with 5 ICD-10-CM diagnosis codes, of which 3 are billable in fiscal year 2026. The section is organized into the 2 code ranges listed below.
Code Ranges in This Section 2 ranges · 5 codes
| Code Range | Title | Codes | Billable |
|---|---|---|---|
| U07 | Emergency use of U07 (U07) | 3 | 2 |
| U09 | Post COVID-19 condition (U09) | 2 | 1 |
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the U00–U49 Code Range
ICD-10 codes U00-U49 cover new diseases of uncertain cause or urgent conditions needing immediate classification, including key codes for COVID-19 and vaping-related lung disorders. This range is essential for tracking emerging health threats and complications.
This set includes U07.0, which specifically codes for vaping-related disorders such as lung injury or lipoid pneumonitis caused by e-cigarette use or dabbing. These conditions are also known as inhalation injuries or interstitial lung disorders linked to vaping. The code U07.1 is used for confirmed COVID-19 infections, capturing a wide variety of related health issues like acute respiratory distress, myocarditis, and asymptomatic SARS-CoV-2 infections. For ongoing symptoms after initial infection, U09.9 represents post COVID-19 conditions, often called post-acute COVID-19 or chronic post-COVID-19 syndrome. Including these codes allows healthcare professionals to document both immediate and long-term effects of these modern diseases reliably for clinical care and public health monitoring.
Questions About This Page
How many codes are in the U00-U49 range?
The U00-U49 range contains 5 ICD-10-CM diagnosis codes in FY 2026. 3 of them are billable, and the rest are category headers that organize the section.
What conditions does U00-U49 cover?
The range covers provisional assignment of new diseases of uncertain etiology or emergency use. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
