The ICD-10-CM classifies CKD based on severity. The severity of CKD is designated by stages 1-5. Stage 2, code N18.2, equates to mild CKD; stage 3, codes N18.30-N18.32, equate to moderate CKD; and stage 4, code N18.4, equates to severe CKD. Code N18.6, End stage renal disease (ESRD), is assigned when the provider has documented end- stage renal disease (ESRD). If both a stage of CKD and ESRD are documented, assign code N18.6 only.
N05.7
Unspecified nephritic syndrome with diffuse crescentic glomerulonephritis
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 10 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 12 never code together
N05code
N00-N99chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 6
Official Guidelines 3
ICD-10-CM Official Guidelines for Coding and Reporting, quoted in full. Published by CMS and NCHS; in the public domain.
Patients who have undergone kidney transplant may still have some form of chronic kidney disease (CKD) because the kidney transplant may not fully restore kidney function. Therefore, the presence of CKD alone does not constitute a transplant complication. Assign the appropriate N18 code for the patient’s stage of CKD and code Z94.0, Kidney transplant status. If a transplant complication such as failure or rejection or other transplant complication is documented, see section I.C.19.g for information on coding complications of a kidney transplant. If the documentation is unclear as to whether the patient has a complication of the transplant, query the provider.
Patients with CKD may also suffer from other serious conditions, most commonly diabetes mellitus and hypertension. The sequencing of the CKD code in relationship to codes for other contributing conditions is based on the conventions in the Tabular List. See I.C.9. Hypertensive chronic kidney disease. See I.C.19. Chronic kidney disease and kidney transplant complications.
Index entries leading here 2
Alongside this code 10 same parent — N05
N05.0 Unsp nephritic syndrome with minor glomerular abnormality N05.1 Unsp neph syndrome w focal and segmental glomerular lesions N05.2 Unsp nephritic syndrome w diffuse membranous glomrlneph N05.3 Unsp neph syndrome w diffuse mesangial prolif glomrlneph N05.4 Unsp neph syndrome w diffuse endocaplry prolif glomrlneph N05.5 Unsp nephritic syndrome w diffuse mesangiocap glomrlneph N05.6 Unspecified nephritic syndrome with dense deposit disease N05.8 Unsp nephritic syndrome with other morphologic changes N05.9 Unsp nephritic syndrome with unspecified morphologic changes N05.A Unspecified nephritic syndrome with C3 glomerulonephritis
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.