N17.2 Acute kidney failure with medullary necrosis
The ICD-10-CM code for Acute kidney failure with medullary necrosis is N17.2 (FY2026). It is a billable, claim-ready diagnosis code.
Classification
- Section
- N17-N19: Acute kidney failure and chronic kidney disease (N17-N19)
- Category N17
- 6 codes (5 billable)
- FY2026 Status
- Stable since FY2024
Also Known As
ICD-10-CM Alphabetic Index entries that lead to N17.2:
- Necrosis, necrotic (ischemic) › medullary (acute) (renal)
- Papillitis › necrotizing, kidney
- Papillitis › renal, necrotizing
- Nephropathy › phenacetin
- Necrosis, necrotic (ischemic) › papillary (acute) (renal)
- Necrosis, necrotic (ischemic) › kidney (bilateral) › medullary (bilateral) (in acute renal failure) (papillary)
- Necrosis, necrotic (ischemic) › kidney (bilateral) › papillary (bilateral) (in acute renal failure)
- Nephropathy › analgesic › with medullary necrosis, acute
Inclusion Terms
- Medullary [papillary] necrosis NOS
- Acute medullary [papillary] necrosis
- Renal medullary [papillary] necrosis
U.S. Hospital Utilization
- An estimated 705 U.S. inpatient stays in 2023 included N17.2 among the documented diagnoses.
- 130 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