ICD-10 Code for Nephritis

The default ICD-10-CM 2027 code for nephritis, nephritic (albuminuric) (azotemic) (congenital) (disseminated) (epithelial) (familial) (focal) (granulomatous) (hemorrhagic) (infantile) (nonsuppurative, excretory) (uremic) is N05.9 – Unspecified nephritic syndrome with unspecified morphologic changes. More specific codes depend on the details documented, as listed in the official index (79 codes, 78 billable).

Main code: N05.9 – Unspecified nephritic syndrome with unspecified morphologic changes
Billable: Yes

Index entries for Nephritis

with
- C3
  - glomerulonephritis – N05.A
  - glomerulopathy – N05.A
    - with dense deposit disease – N05.6
- dense deposit disease – N05.6
- diffuse
  - crescentic glomerulonephritis – N05.7
  - endocapillary proliferative glomerulonephritis – N05.4
  - membranous glomerulonephritis – N05.2
  - mesangial proliferative glomerulonephritis – N05.3
  - mesangiocapillary glomerulonephritis – N05.5
- edema – see Nephrosis
- focal and segmental glomerular lesions – N05.1
- foot process disease – N04.9
- glomerular lesion
  - diffuse sclerosing – N05.8
  - hypocomplementemic – see Nephritis, membranoproliferative
  - IgA – see Nephropathy, IgA
  - lobular, lobulonodular – see Nephritis, membranoproliferative
  - nodular – see Nephritis, membranoproliferative
  - idiopathic immune membranoproliferative glomerulonephritis (IC-MPGN) – N04.B1
  - secondary immune complex membranoproliferative glomerulonephritis (IC-MPGN) – N04.B2
- lesion of
  - glomerulonephritis, proliferative – N05.8
  - renal necrosis – N05.9
- minor glomerular abnormality – N05.0
- specified morphological changes NEC – N05.8
acute – N00.9
- with
  - C3
    - glomerulonephritis – N00.A
    - glomerulopathy – N00.A
      - with dense deposit disease – N00.6
  - dense deposit disease – N00.6
  - diffuse
    - crescentic glomerulonephritis – N00.7
    - endocapillary proliferative glomerulonephritis – N00.4
    - membranous glomerulonephritis – N00.2
    - mesangial proliferative glomerulonephritis – N00.3
    - mesangiocapillary glomerulonephritis – N00.5
  - focal and segmental glomerular lesions – N00.1
  - idiopathic immune membranoproliferative glomerulonephritis (IC-MPGN) – N00.B1
  - secondary immune complex membranoproliferative glomerulonephritis (IC-MPGN) – N00.B2
  - minor glomerular abnormality – N00.0
  - specified morphological changes NEC – N00.8
amyloid – E85.4 – N08 [manifestation]
antiglomerular basement membrane (anti-GBM)
- in Goodpasture's syndrome – M31.0
antitubular basement membrane (tubulo-interstitial) – N12
- toxic – see Nephropathy, toxic
arteriolar – see Hypertension, kidney
arteriosclerotic – see Hypertension, kidney
ascending – see Nephritis, tubulo-interstitial
atrophic – N03.9
Balkan (endemic) – N15.0
calculous, calculus – see Calculus, kidney
cardiac – see Hypertension, kidney
cardiovascular – see Hypertension, kidney
chronic – N03.9
- with
  - C3
    - glomerulonephritis – N03.A
    - glomerulopathy – N03.A
      - with dense deposit disease – N03.6
  - dense deposit disease – N03.6
  - diffuse
    - crescentic glomerulonephritis – N03.7
    - endocapillary proliferative glomerulonephritis – N03.4
    - membranous glomerulonephritis – N03.2
    - mesangial proliferative glomerulonephritis – N03.3
    - mesangiocapillary glomerulonephritis – N03.5
  - focal and segmental glomerular lesions – N03.1
  - minor glomerular abnormality – N03.0
  - specified morphological changes NEC – N03.8
- arteriosclerotic – see Hypertension, kidney
cirrhotic – N26.9
complicating pregnancy – O26.83- (header)
croupous – N00.9
degenerative – see Nephrosis
diffuse sclerosing – N05.8
due to
- diabetes mellitus – see E08-E13 with .21
- subacute bacterial endocarditis – I33.0
- systemic lupus erythematosus (chronic) – M32.14
- typhoid fever – A01.09
gonococcal (acute) (chronic) – A54.21
hypocomplementemic – see Nephritis, membranoproliferative
IgA – see Nephropathy, IgA
immune complex (circulating) – N05.8
infective – see Nephritis, tubulo-interstitial
interstitial – see Nephritis, tubulo-interstitial
lead – N14.3
membranoproliferative (diffuse) (type 1 or 3) – N05.5 – see also N00-N07 with fourth character .5
- type 2 – N05.6 – see also N00-N07 with fourth character .6
minimal change – N05.0
necrotic, necrotizing NEC – N05.8 – see also N00-N07 with fourth character .8
nephrotic – see Nephrosis
nodular – see Nephritis, membranoproliferative
polycystic – Q61.3
- adult type – Q61.2
- autosomal
  - dominant – Q61.2
  - recessive NEC – Q61.19
- childhood type NEC – Q61.19
- infantile type NEC – Q61.19
poststreptococcal – N05.9
- acute – N00.9
- chronic – N03.9
- rapidly progressive – N01.9
proliferative NEC – N05.8 – see also N00-N07 with fourth character .8
purulent – see Nephritis, tubulo-interstitial
rapidly progressive – N01.9
- with
  - C3
    - glomerulonephritis – N01.A
    - glomerulopathy – N01.A
      - with dense deposit disease – N01.6
  - dense deposit disease – N01.6
  - diffuse
    - crescentic glomerulonephritis – N01.7
    - endocapillary proliferative glomerulonephritis – N01.4
    - membranous glomerulonephritis – N01.2
    - mesangial proliferative glomerulonephritis – N01.3
    - mesangiocapillary glomerulonephritis – N01.5
  - focal and segmental glomerular lesions – N01.1
  - minor glomerular abnormality – N01.0
  - specified morphological changes NEC – N01.8
salt losing or wasting NEC – N28.89
saturnine – N14.3
sclerosing, diffuse – N05.8
septic – see Nephritis, tubulo-interstitial
specified pathology NEC – N05.8 – see also N00-N07 with fourth character .8
subacute – N01.9
suppurative – see Nephritis, tubulo-interstitial
syphilitic (late) – A52.75
- congenital – A50.59 – N08 [manifestation]
- early (secondary) – A51.44
toxic – see Nephropathy, toxic
tubal, tubular – see Nephritis, tubulo-interstitial
tuberculous – A18.11
tubulo-interstitial (in) – N12
- acute (infectious) – N10
- chronic (infectious) – N11.9
  - nonobstructive – N11.8
    - reflux-associated – N11.0
  - obstructive – N11.1
  - specified NEC – N11.8
- due to
  - brucellosis – A23.9 – N16 [manifestation]
  - cryoglobulinemia – D89.1 – N16 [manifestation]
  - glycogen storage disease – E74.00 – N16 [manifestation]
- Sjögren's syndrome – M35.04
vascular – see Hypertension, kidney
war – N00.9

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.