Excludes1 Notes in Chapter 22: Codes for Special Purposes ICD-10-CM
An Excludes1 note means "NOT CODED HERE": the excluded code should never be reported together with the code above the note. In Chapter 22 (U00-U49), notes printed in the chapter name other codes 0 times, and Excludes1 Notes anywhere in the Tabular List name the chapter’s codes 2 times, covering 2 distinct codes, categories and ranges. Switch views to read the list either way.
Excludes1 Notes by the code that carries the note
- U07.1 COVID-19
- B34.2 Coronavirus infection, unspecified: COVID-19 (U07.1)
- U09.9 Post COVID-19 condition, unspecified
- Z86.16 Personal history of COVID-19: post COVID-19 condition (U09.9)
The first view lists notes printed in this chapter (a note on a category or block applies to every code beneath it). The second lists codes of this chapter named by Excludes1 Notes anywhere in the Tabular List, including notes in other chapters.
Questions About Excludes1 Notes
What does an Excludes1 note mean?
An Excludes1 note means “NOT CODED HERE!”: the excluded code should never be used at the same time as the code above the note. It is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition (Section I.A.12.a). The FY 2027 Tabular List has 5,411 of them; 5,284 name other codes, with 5,710 references to 3,528 distinct codes, categories and ranges.
Is there any exception to an Excludes1 note?
Yes: when the two conditions are unrelated to each other. The Guidelines’ example is F45.8, whose Excludes1 note names sleep related teeth grinding (G47.63). A patient with psychogenic dysmenorrhea (an inclusion term of F45.8) and teeth grinding may have both codes reported. If it is not clear whether the conditions are related, query the provider.
Related References
Source: FY 2027 ICD-10-CM Tabular List (CMS and NCHS) and the ICD-10-CM Official Guidelines for Coding and Reporting FY 2027, Section I.A. ICD List is not affiliated with CMS or NCHS.
