N03.6 vs N03.A
N03.6 and N03.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.
N03.6
Chronic nephritic syndrome with dense deposit disease
Billable
- Chapter 14
- Diseases of the genitourinary system
- Section
- N00-N08
Use when the record says
- Chronic nephritic syndrome with C3 glomerulopathy with dense deposit disease
- Chronic nephritic syndrome with membranoproliferative glomerulonephritis, type 2
Indexed under
- Nephritis, nephritic › chronic › with › dense deposit disease (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)
- Nephritis, nephritic › chronic › with › C3 › glomerulopathy › with dense deposit disease (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)
N03.A
Chronic nephritic syndrome with C3 glomerulonephritis
Billable
- Chapter 14
- Diseases of the genitourinary system
- Section
- N00-N08
Use when the record says
- Chronic nephritic syndrome with C3 glomerulopathy
Indexed under
- Nephritis, nephritic › chronic › with › C3 › glomerulonephritis (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)
- Nephritis, nephritic › chronic › 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