ICD-10 Code for Chronic Kidney Disease (CKD)
Also searched as chronic renal disease
The ICD-10-CM code for chronic kidney disease (CKD) is N18.9 — Chronic kidney disease, unspecified. It is billable for FY2027.
Chronic kidney disease ICD-10 codes at a glance
| Condition | Chronic kidney disease (CKD) |
|---|---|
| Code | N18.9 — Chronic kidney disease, unspecified |
| Billable | Yes (N18.9) |
| Alphabetic Index entry | Disease, diseased, kidney, chronic |
| Code set | ICD-10-CM FY2027, valid October 1, 2026 – September 30, 2027 |
What changes the chronic kidney disease code?
The Alphabetic Index lists these qualifiers under Disease, diseased, kidney, chronic. If the record documents one of them, the code changes. Verify the code in the Tabular List before reporting it.
| stage 1 | N18.1 | Chronic kidney disease, stage 1 |
| stage 2 | N18.2 | Chronic kidney disease, stage 2 (mild) |
| stage 3 | N18.30 | Chronic kidney disease, stage 3 unspecified |
| stage 3a | N18.31 | Chronic kidney disease, stage 3a |
| stage 3b | N18.32 | Chronic kidney disease, stage 3b |
| stage 4 | N18.4 | Chronic kidney disease, stage 4 (severe) |
| stage 5 | N18.5 | Chronic kidney disease, stage 5 |
What else changes the chronic kidney disease code?
Chronic kidney disease with hypertension is coded to category I12 — I12.9 for stage 1 through 4 or unspecified CKD, I12.0 for stage 5 or end-stage renal disease — with the N18 code as a secondary code for the stage.
Chronic kidney disease in a patient with type 2 diabetes is coded E11.22, again with the N18 code for the stage: the classification presumes the link.
“Assign codes from category I12, Hypertensive chronic kidney disease, when both hypertension and a condition classifiable to category N18, Chronic kidney disease (CKD), are present.”
“The appropriate code from category N18 should be used as a secondary code with a code from category I12 to identify the stage of chronic kidney disease.”
“The word "with" or "in" should be interpreted to mean "associated with" or "due to" when it appears in a code title, the Alphabetic Index (either under a main term or subterm), or an instructional note in the Tabular List.”
What does the Tabular List say about N18.9?
The instructional notes that govern N18.9, including those it inherits from its category and chapter. An Excludes1 note means the two codes are never reported together.
Inclusion terms
Alternative wording in documentation that is classified to N18.9.
- Chronic renal disease
- Chronic renal failure NOS
- Chronic renal insufficiency
- Chronic uremia NOS
- Diffuse sclerosing glomerulonephritis NOS
Code first — inherited from N18
The underlying condition below must be sequenced before N18.9. N18.9 describes a manifestation and cannot be the principal or first-listed diagnosis.
Use additional code — inherited from N18
Report an additional code alongside N18.9 to fully describe the condition. N18.9 is sequenced first.
Excludes2 — not included here — inherited from Chapter 14
The conditions below are not part of N18.9, but a patient may have both at the same time. When documentation supports it, N18.9 and the excluded code may both 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)
Excludes2 — not included here — inherited from N17-N19
The conditions below are not part of N18.9, but a patient may have both at the same time. When documentation supports it, N18.9 and the excluded code may both be reported.
- congenital renal failure (P96.0)
- drug- and heavy-metal-induced tubulo-interstitial and tubular conditions (N14.-)
- extrarenal uremia (R39.2)
- hemolytic-uremic syndrome (D59.3-)
- hepatorenal syndrome (K76.7)
- postpartum hepatorenal syndrome (O90.41)
- posttraumatic renal failure (T79.5)
- prerenal uremia (R39.2)
- renal failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.4)
- renal failure following labor and delivery (O90.41)
- renal failure postprocedural (N99.0)
Codes, descriptions and Index entries are from the official ICD-10-CM FY2027 release. Guideline text is quoted from the ICD-10-CM Official Guidelines for Coding and Reporting FY 2027. A code must always be verified in the Tabular List before it is reported. Data sources