DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

N03 Chronic nephritic syndrome

  • Header · not billable

N03 is not billable. The category heads 11 billable codes in FY2027: the 11 codes directly below it.

Index → code

  • Whitekidney, small → N03.9
  • Small (ness)white kidney → N03.9
  • Glomerulonephritischronic → N03.9

Where it sits

  1. Chapter 14 Diseases of the genitourinary system (N00-N99)
  2. N00-N08 Glomerular diseases (N00-N08)
  3. N03 Chronic nephritic syndrome
Billable codes
11
Subdivisions
11
CC / MCC codes
11 / 0
HCC V28 codes
0
New FY2027
0
Index entries
21

Codes in N03

  1. N03.0
    Chronic nephritic syndrome with minor glomerular abnormality
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Chronic nephritic syndrome with minimal change lesion
  2. N03.1
    Chronic nephritic syndrome with focal and segmental glomerular lesions
    BillableCC
    Inclusion terms 3

    Inclusion terms

    • Chronic nephritic syndrome with focal and segmental hyalinosis
    • Chronic nephritic syndrome with focal and segmental sclerosis
    • Chronic nephritic syndrome with focal glomerulonephritis
  3. N03.2
    Chronic nephritic syndrome with diffuse membranous glomerulonephritis
    BillableCC
  4. N03.3
    Chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritis
    BillableCC
  5. N03.4
    Chronic nephritic syndrome with diffuse endocapillary proliferative glomerulonephritis
    BillableCC
  6. N03.5
    Chronic nephritic syndrome with diffuse mesangiocapillary glomerulonephritis
    BillableCC
    Inclusion terms 1, Excludes1 2

    Inclusion terms

    • Chronic nephritic syndrome with membranoproliferative glomerulonephritis, types 1 and 3, or NOS

    Excludes1

    • Chronic nephritic syndrome with C3 glomerulonephritis (N03.A) N03.A
    • Chronic nephritic syndrome with C3 glomerulopathy (N03.A) N03.A
  7. N03.6
    Chronic nephritic syndrome with dense deposit disease
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Chronic nephritic syndrome with C3 glomerulopathy with dense deposit disease
    • Chronic nephritic syndrome with membranoproliferative glomerulonephritis, type 2
  8. N03.7
    Chronic nephritic syndrome with diffuse crescentic glomerulonephritis
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Chronic nephritic syndrome with extracapillary glomerulonephritis
  9. N03.8
    Chronic nephritic syndrome with other morphologic changes
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Chronic nephritic syndrome with proliferative glomerulonephritis NOS
  10. N03.9
    Chronic nephritic syndrome with unspecified morphologic changes
    BillableCC
  11. N03.A
    Chronic nephritic syndrome with C3 glomerulonephritis
    BillableCC
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Chronic nephritic syndrome with C3 glomerulopathy

    Excludes1

    • Chronic nephritic syndrome (with C3 glomerulopathy) with dense deposit disease (N03.6) N03.6

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At N03

Includes

  • chronic glomerular disease
  • chronic glomerulonephritis
  • chronic nephritis

Excludes1

  • chronic tubulo-interstitial nephritis (N11.-) N11
  • diffuse sclerosing glomerulonephritis (N05.8-) N05.8
  • nephritic syndrome NOS (N05.-) N05

Notes that also apply

Block N00-N08 instructions (Excludes1 1, Code also 1): printed on the block page.

Chapter 14 instructions (Excludes2 8): printed on the chapter 14 page.

Index entries

  • Glomerulonephritischronic → N03.9
  • Glomerulonephritislatent or quiescent → N03.9
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)atrophic → N03.9
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)chronic → N03.9
  • Small (ness)white kidney → N03.9
  • Whitekidney, small → N03.9
  • Glomerulonephritispoststreptococcal NECchronic → N03.9
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)poststreptococcalchronic → N03.9
  • Syndromenephriticchronic → N03.9
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)chronicwithminor glomerular abnormality → N03.0
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)chronicwithfocal and segmental glomerular lesions → N03.1
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)chronicwithdense deposit disease → N03.6
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)chronicwithspecified morphological changes NEC → N03.8
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)chronicwithdiffusemembranous glomerulonephritis → N03.2
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)chronicwithdiffusemesangial proliferative glomerulonephritis → N03.3
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)chronicwithdiffuseendocapillary proliferative glomerulonephritis → N03.4
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)chronicwithdiffusemesangiocapillary glomerulonephritis → N03.5
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)chronicwithdiffusecrescentic glomerulonephritis → N03.7
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)chronicwithC3glomerulonephritis → N03.A
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)chronicwithC3glomerulopathy → N03.A
  • Nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic)chronicwithC3glomerulopathywith dense deposit disease → N03.6

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy