2027 ICD-10-CM Diagnosis Code N99.0Postprocedural (acute) (chronic) kidney failure
ICD-10-CM Codes›N00–N99›N99›N99
- Billable — Valid for Submission
- Not Chronic
N99.0 is a billable ICD-10-CM diagnosis code for postprocedural (acute) (chronic) kidney failure. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 698 through 700, 791, 793. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acute and unspecified renal failure and Postprocedural or postoperative genitourinary system complication.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute kidney injury following administration of contrast media
- Acute postoperative renal failure
- Acute renal cortical necrosis
- Acute renal failure due to procedure
- Acute tubular necrosis
- Anuria
- Anuria following procedure
- Oliguria
- Oliguria following procedure
- Postoperative acute tubular necrosis
- Postoperative renal failure
- Postoperative renal impairment
- Postprocedural acute renal failure
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to N99.0: its own notes plus those printed at N99 and Chapter 14. A note printed at a category, block or chapter applies to every code under it.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to type of kidney disease
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name N99.0, its category, or a range that includes it.
Excludes2 3
These codes carry an Excludes2 note naming N99.0: its condition is not part of those codes, and both may be reported when the patient has both.
- Block N17-N19 Acute kidney failure and chronic kidney diseaserenal failure postprocedural (N99.0)
- Block T80-T88 Complications of surgical and medical care, not elsewhere classifiedintraoperative and postprocedural complications of specified body systems (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95.6-, J95.7, K91.6-, L76.-, M96.-, N99.-) names N99.-, which includes this code
- T81 Complications of procedures, not elsewhere classifiedintraoperative and postprocedural complications of specific body system (D78.-, E36.-, E89.-, G97.3-, G97.4, H59.3-, H59.-, H95.2-, H95.3, I97.4-, I97.5, J95, K91.-, L76.-, M96.-, N99.-) names N99.-, which includes this code
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
postprocedural N99.0
Necrosis, necrotic (ischemic) See Also: Gangrene;
postprocedural N99.0
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Kidney Failure
Healthy kidneys clean your blood by removing excess fluid, minerals, and wastes. They also make hormones that keep your bones strong and your blood healthy. But if the kidneys are damaged, they don't work properly. Harmful wastes can build up in your body. Your blood pressure may rise.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert N99.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About N99.0Overview
What is the ICD-10 code for postprocedural (acute) (chronic) kidney failure?
The ICD-10-CM code for postprocedural (acute) (chronic) kidney failure is N99.0 (sometimes written as N990). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is N99.0 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report postprocedural (acute) (chronic) kidney failure on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does N99.0 group to?
When postprocedural (acute) (chronic) kidney failure is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 699, 698, 700, with relative weights from 0.6740 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Does N99.0 need an additional code?
When the condition applies, yes. The Use Additional Code note reads: code to type of kidney disease. The additional code is reported after N99.0.
What is the ICD-9 equivalent of N99.0?
Under the General Equivalence Mappings, postprocedural (acute) (chronic) kidney failure converts to ICD-9-CM 997.5 (surg compl-urinary tract). The mapping is approximate, so confirm the match fits the documentation.
