Alphabetic Index FY2027

N99.0

Postprocedural (acute) (chronic) kidney failure

FY2027Chapter 14: Diseases of the genitourinary system/N99 Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified

BillableComplete code, valid to report
Care settingsHome Health Primary · MMTA - Gastrointestinal tract and Genitourinary systemIPF Comorbidity · Artificial Openings – Digestive & Urinary

N99.0 (also written N990) is a billable ICD-10-CM diagnosis code for postprocedural (acute) (chronic) kidney failure. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 44 codes in category N99 (Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified). The Alphabetic Index lists it under 7 entries. Its coding notes include a Use additional code instruction and 11 Excludes2 entries.

Guidelines tip

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

Intraoperative and postprocedural complications are coded from the body system chapters unless the complication is specifically indexed to a T code.

Guidelines I.C.19.g.5Postprocedural complications in the body system chaptersRead the official text

Use additional code

Add the listed code as a secondary code, if known.

This code
  • code to type of kidney disease

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Inherited from N99 Intraoperative and postprocedural complications and disorders of genitourinary system, not elsewhere classified
  • irradiation cystitis (N30.4-)
  • postoophorectomy osteoporosis with current pathological fracture (M80.8-)
  • postoophorectomy osteoporosis without current pathological fracture (M81.8)
Also from chapter/block level (8 notes)
Inherited from Chapter 14 Diseases of the genitourinary system
  • 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)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

Home Health Primary

Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Gastrointestinal tract and Genitourinary system clinical group.

Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026

IPF Comorbidity

On the CMS IPF comorbidity list.

Comorbidity categoryFactor
Artificial Openings – Digestive & Urinary1.07
It counts as a comorbidity when reported as a secondary diagnosis and actively treated during the stay. An IPF receives only one adjustment within a category and can receive adjustments in more than one category.

Source: CMS IPF PPS FY 2027 final rule (CMS-1847-F), Addendum B-3 (comorbidity codes with adjustment factor); effective for discharges on or after October 1, 2026

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 7 entries