N05.6 vs N05.A
N05.6 and N05.A can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
N05.6
Unspecified nephritic syndrome with dense deposit disease
BillableUnspecified
- Chapter 14
- Diseases of the genitourinary system
- Section
- N00-N08
Use when the record says
- Unspecified nephritic syndrome with C3 glomerulopathy with dense deposit disease
- Unspecified nephritic syndrome with membranoproliferative glomerulonephritis, type 2
Indexed under
- Disease, diseased › dense deposit
- Glomerulonephritis › dense deposit
- Glomerulonephritis › membranoproliferative › dense depositNEC
- Nephritis, nephritic › with › dense deposit disease (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)
- Nephritis, nephritic › membranoproliferative › type 2 (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)
N05.A
Unspecified nephritic syndrome with C3 glomerulonephritis
BillableUnspecified
- Chapter 14
- Diseases of the genitourinary system
- Section
- N00-N08
Use when the record says
- Unspecified nephritic syndrome with C3 glomerulopathy
Indexed under
- Glomerulonephritis › with › C3 › glomerulonephritis
- Glomerulonephritis › with › C3 › glomerulopathy
- Nephritis, nephritic › with › C3 › glomerulonephritis (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)
- Nephritis, nephritic › with › C3 › glomerulopathy (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)
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