N18
Non-billableChronic kidney disease (CKD)
Chronic kidney disease (CKD)
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •congenital renal failureP96.0
- •drug- and heavy-metal-induced tubulo-interstitial and tubular conditionsN14
- •extrarenal uremiaR39.2
- •hemolytic-uremic syndromeD59.3
- •hepatorenal syndromeK76.7
- •postpartum hepatorenal syndromeO90.41
- •posttraumatic renal failureT79.5
- •prerenal uremiaR39.2
- •renal failure complicating abortion or ectopic or molar pregnancy,O00-O07, O08.4
- •renal failure following labor and deliveryO90.41
- •renal failure postproceduralN99.0
Code First
The underlying condition must be sequenced before this code
Use Additional Code
Additional codes that should follow this code
Child Codes (7)
N18.1Chronic kidney disease, stage 1
N18.2Chronic kidney disease, stage 2 (mild)
N18.3Chronic kidney disease, stage 3 (moderate)
N18.4Chronic kidney disease, stage 4 (severe)
N18.5Chronic kidney disease, stage 5
N18.6End stage renal disease
N18.9Chronic kidney disease, unspecified
Related Conditions
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(25)
UMLS
- CKDC1561643
- CKD - Chronic Kidney DiseaseC1561643
- CKD - chronic kidney diseaseC1561643
- Chronic Kidney DiseaseC1561643
- Chronic Kidney DiseasesC1561643
- Chronic Renal DiseaseC1561643
- Chronic Renal DiseasesC1561643
- Chronic kidney diseaseC1561643
- Chronic kidney disease (CKD)C1561643
- Chronic kidney disease (disorder)C1561643
- Chronic kidney disease, unspecifiedC1561643
- Chronic renal diseaseC1561643
- Disease, Chronic KidneyC1561643
- Disease, Chronic RenalC1561643
- Diseases, Chronic KidneyC1561643
- Diseases, Chronic RenalC1561643
- Kidney Disease, ChronicC1561643
- Kidney Diseases, ChronicC1561643
- Loss of renal functionC1561643
- Renal Disease, ChronicC1561643
- Renal Diseases, ChronicC1561643
- chronic disease renalC1561643
- chronic diseases renalC1561643
- chronic renal diseaseC1561643
- renal disease chronicC1561643
Frequently Asked Questions
What is the ICD-10 code for chronic kidney disease (ckd)?
The ICD-10-CM code for chronic kidney disease (ckd) is N18. The full clinical description is "Chronic kidney disease (CKD)". N18 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code N18 mean?
ICD-10-CM code N18 represents “Chronic kidney disease (CKD)”. It is classified under Chapter 14: Diseases of the Genitourinary System and is a non-billable header code. Use a more specific child code for billing purposes.
Is N18 a billable code?
No, N18 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 7 child codes under N18.
What chapter is N18 in?
N18 is in Chapter 14: Diseases of the Genitourinary System (codes N00-N99).
What are the subcategories under N18?
N18 has 7 child codes, including: N18.1 (Chronic kidney disease, stage 1), N18.2 (Chronic kidney disease, stage 2 (mild)), N18.3 (Chronic kidney disease, stage 3 (moderate)), N18.4 (Chronic kidney disease, stage 4 (severe)), and 3 more.
Are additional codes required with N18?
Yes, when using N18, also report: kidney transplant status, if applicable, (Z94.0).
What are the UMLS CUIs for N18?
N18 is linked to 1 UMLS Concept Unique Identifier: C1561643. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does N18 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like chronic kidney disease (ckd) affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of N18?
N18 maps to the ICD-11 code: GB61.Z (Chronic kidney disease, stage unspecified).
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.