N27 ICD-10-CA category: Small kidney of unknown cause
N27 isn’t a code on its own. Choose one of the 3 codes beneath it, the one the documentation supports.
Official description
N27Small kidney of unknown cause
ICD-10-CA · Canada
Codes in N27
N27 isn’t a code on its own. Open the code that matches what the note documents.
Notes for N27
As CIHI prints them, with any note N27 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- With urolithiasis (N20-N23)From N25-N29 Other disorders of kidney and ureter
- Certain conditions originating in the perinatal period (P00-P96)certain infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 14: Diseases of the genitourinary system (N00-N99)
Where N27 sits
- 1ChapterChapter 14: Diseases of the genitourinary system (N00-N99)
- 2Block N25-N29Other disorders of kidney and ureter
- 3Category N27Small kidney of unknown cause
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
Is N27 a valid ICD-10-CA code?
No. N27 (Small kidney of unknown cause) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 3 codes; record the one the documentation supports.
Where is N27 in ICD-10-CA?
N27 sits under N25-N29 Other disorders of kidney and ureter, within Chapter 14: Diseases of the genitourinary system (N00-N99).
What coding notes apply to N27?
ICD-10-CA lists Excludes notes for N27, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.