Excludes1 pair
N00.5 vs N00.A
N00.5 and N00.A are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
N00.5
Acute nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
Billable
- Chapter 14
- Diseases of the genitourinary system
- Section
- N00-N08
Indexed under
- Nephritis, nephritic › acute › with › diffuse › mesangiocapillary glomerulonephritis
N00.A
Acute nephritic syndrome with C3 glomerulonephritis
Billable
- Chapter 14
- Diseases of the genitourinary system
- Section
- N00-N08
Use when the record says
- Acute nephritic syndrome with C3 glomerulopathy, NOS
Indexed under
- Nephritis, nephritic › acute › with › C3 › glomerulonephritis
- Nephritis, nephritic › acute › with › C3 › glomerulopathy
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027