FY2027 ICD-10-CM reference
N05: Unspecified nephritic syndrome
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Unspecified nephritic syndrome. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
CMS-HCC V28
Not applicable to this nonbillable heading
CMS-HCC V24
Not applicable to this nonbillable heading
ESRD
Not applicable to this nonbillable heading
PACE
Not applicable to this nonbillable heading
RxHCC
Not applicable to this nonbillable heading
HHS-HCC
Not applicable to this nonbillable heading
More specific FY2027 codes
- N05.0: Unspecified nephritic syndrome with minor glomerular abnormalityBillable code
- N05.1: Unspecified nephritic syndrome with focal and segmental glomerular lesionsBillable code
- N05.2: Unspecified nephritic syndrome with diffuse membranous glomerulonephritisBillable code
- N05.3: Unspecified nephritic syndrome with diffuse mesangial proliferative glomerulonephritisBillable code
- N05.4: Unspecified nephritic syndrome with diffuse endocapillary proliferative glomerulonephritisBillable code
- N05.5: Unspecified nephritic syndrome with diffuse mesangiocapillary glomerulonephritisBillable code
- N05.6: Unspecified nephritic syndrome with dense deposit diseaseBillable code
- N05.7: Unspecified nephritic syndrome with diffuse crescentic glomerulonephritisBillable code
- N05.8: Unspecified nephritic syndrome with other morphologic changesBillable code
- N05.9: Unspecified nephritic syndrome with unspecified morphologic changesBillable code
- N05.A: Unspecified nephritic syndrome with C3 glomerulonephritisBillable code
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: N00-N99 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: N00-N99 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: N00-N99 (chapter, inherited).
Excludes2
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
Source: N00-N99 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: N00-N99 (chapter, inherited).
Excludes2
injury, poisoning and certain other consequences of external causes (S00-T88)
Source: N00-N99 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: N00-N99 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: N00-N99 (chapter, inherited).
Code also
any associated kidney failure (N17-N19).
Source: N00-N08 (section, inherited).
Excludes1
hypertensive chronic kidney disease (I12.-)
Source: N00-N08 (section, inherited).
Includes
glomerular disease NOS
Source: N05 (category, direct).
Includes
glomerulonephritis NOS
Source: N05 (category, direct).
Includes
nephritis NOS
Source: N05 (category, direct).
Includes
nephropathy NOS and renal disease NOS with morphological lesion specified in .0-.8
Source: N05 (category, direct).
Excludes1
nephropathy NOS with no stated morphological lesion (N28.9)
Source: N05 (category, direct).
Excludes1
renal disease NOS with no stated morphological lesion (N28.9)
Source: N05 (category, direct).
Excludes1
tubulo-interstitial nephritis NOS (N12)
Source: N05 (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does N05 mean in FY2027?
The official ICD-10-CM descriptor is Unspecified nephritic syndrome. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is N05 billable in FY2027?
The FY2027 order file marks N05 as a nonbillable heading. Select a complete billable child code.
Does N05 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition