N18.3 ICD-10-CA code: Chronic kidney disease, stage 3
N18.3 is the ICD-10-CA code for “Chronic kidney disease, stage 3” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
N18.3Chronic kidney disease, stage 3
Short description: Chronic kidney disease stage 3
ICD-10-CA · Canada · Also written N183
Index terms
Entries in CIHI’s alphabetical index that lead to N18.3. Searching the index by the condition the note names is how coders reach this code.
- Failure, failed, kidney, chronic, stage 3
- Impaired, impairment (function), kidney, chronic, stage 3
- Disease, diseased, kidney (functional) (pelvis), chronic, stage 3
Notes for N18.3
As CIHI prints them, with any note N18.3 takes from the headings above it.
Includes
- Kidney damage with moderately decreased GFR (30-59 mL/min)
Use additional code
Add a code for this detail when the note documents it.
- Use additional code to identify underlying disease.From N18 Chronic kidney disease
- Use additional codes to identify any associated hypertensive renal disease (I12) or hypertensive heart and renal disease (I13).From N18 Chronic kidney disease
- Use additional external cause code (Chapter XX) to identify external agent.From N17-N19 Renal failure
Excludes
Conditions classified elsewhere.
- Congenital renal failure (P96.0)drug- and heavy-metal-induced tubulo-interstitial and tubular conditions (N14.-)extrarenal uraemia (R39.2)haemolytic-uraemic syndrome (D59.3)hepatorenal syndrome (K76.7):• postpartum (O90.4)prerenal uraemia (R39.2)renal failure:• complicating abortion or ectopic or molar pregnancy (O00-O07)(O08.4)• following labour and delivery (O90.4-)• postprocedural (N99.0)From N17-N19 Renal failure
- 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 N18.3 sits
- 1ChapterChapter 14: Diseases of the genitourinary system (N00-N99)
- 2Block N17-N19Renal failure
- 3Category N18Chronic kidney disease
- 4Valid code N18.3Chronic kidney disease, stage 3
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
What does ICD-10-CA code N18.3 mean?
N18.3 is the ICD-10-CA code for “Chronic kidney disease, stage 3” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is N18.3 in ICD-10-CA?
N18.3 sits under N18 Chronic kidney disease, within N17-N19 Renal failure, within Chapter 14: Diseases of the genitourinary system (N00-N99).
What coding notes apply to N18.3?
ICD-10-CA lists Includes, Use additional code, Excludes notes for N18.3, 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.