Excludes1: not coded here
An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note.
An exception to the Excludes1 definition is the circumstance when the two conditions are unrelated to each other.
Example, the Excludes1 notes at E11 Type 2 diabetes mellitus, as printed:
Excludes1
- diabetes mellitus due to underlying condition (E08.-) E08
- drug or chemical induced diabetes mellitus (E09.-) E09
- gestational diabetes (O24.4-) O24.4
- neonatal diabetes mellitus (P70.2) P70.2
- postpancreatectomy diabetes mellitus (E13.-) E13
- postprocedural diabetes mellitus (E13.-) E13
- secondary diabetes mellitus NEC (E13.-) E13
- type 1 diabetes mellitus (E10.-) E10
Excludes2: not included here
When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Example, the Excludes2 notes at S72 Fracture of femur:
Excludes2
How many
| Lines with it | Notes | |
|---|---|---|
| Excludes1 | 2,581 | 5,259 |
| Excludes2 | 1,092 | 2,187 |
| Both on one line | 259 | – |
Excludes1 lines by length: 799 at 3 characters, 1,249 at 4 characters, 399 at 5 characters, 130 at 6 characters, 4 at 7 characters. 18 of the 22 chapters also carry Excludes notes at chapter level, and 108 blocks do. A note applies to everything below the line that carries it, so each code page here lists the Excludes notes of its own line and of every level above it.
Quotes: ICD-10-CM Official Guidelines for Coding and Reporting FY 2027 (CMS and NCHS), by section. Counts: computed from the NCHS FY2027 files on this site's build.