N99.0 Postprocedural (acute) (chronic) kidney failure
The ICD-10-CM code for Postprocedural (acute) (chronic) kidney failure is N99.0 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- N99: Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified (N99)
- Category N99
- 54 codes (42 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to N99.0:
- Oliguria › postprocedural
- Anuria › postprocedural
- Necrosis, necrotic (ischemic) › tubular (acute) (anoxic) (renal) (toxic) › postprocedural
- Block, blocked › kidney › postcystoscopic or postprocedural
- Failure, failed › renal › postprocedural
- Nephrosis, nephrotic (Epstein's) (syndrome) (congenital) › tubular (acute) › postprocedural
- Complication (s) (from) (of) › genitourinary › postprocedural › renal failure
U.S. Hospital Utilization
- An estimated 6,480 U.S. inpatient stays in 2023 included N99.0 among the documented diagnoses.
- 260 stays listed it as the principal diagnosis.
Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.
Official Coding Guidelines
CKD staging and code assignment (N18.-)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).
CKD stage plus ESRD: assign N18.6 onlyIf both a stage of CKD and ESRD are documented, assign code N18.6 only.
Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026