DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

N18 Chronic kidney disease (CKD)

  • Header · not billable

N18 is not billable. The category heads 9 billable codes in FY2027, grouped under 7 subdivisions.

ICD-10 code by name

What is the ICD-10 code for CKD?
CKD ICD-10 code: N18.9 Chronic kidney disease, unspecified. NCHS writes CKD for chronic kidney disease. Search ICD-10 for CKD
What is the ICD-10 code for chronic kidney disease, unspecified?
Chronic kidney disease ICD-10 code: N18.9 Chronic kidney disease, unspecified. Search ICD-10 for chronic kidney disease

Where it sits

  1. Chapter 14 Diseases of the genitourinary system (N00-N99)
  2. N17-N19 Acute kidney failure and chronic kidney disease (N17-N19)
  3. N18 Chronic kidney disease (CKD)
Billable codes
9
Subdivisions
7
CC / MCC codes
2 / 1
HCC V28 codes
6
New FY2027
0
Index entries
27

Codes in N18

  1. N18.1
    Chronic kidney disease, stage 1
    Billable
  2. N18.2
    Chronic kidney disease, stage 2 (mild)
    Billable
  3. N18.3
    Chronic kidney disease, stage 3 (moderate)
    Header
  4. N18.30
    Chronic kidney disease, stage 3 unspecified
    Billable329
  5. N18.31
    Chronic kidney disease, stage 3a
    Billable329
  6. N18.32
    Chronic kidney disease, stage 3b
    Billable328
  7. N18.4
    Chronic kidney disease, stage 4 (severe)
    BillableCC327
  8. N18.5
    Chronic kidney disease, stage 5
    BillableCC326
    Excludes1 1

    Excludes1

    • chronic kidney disease, stage 5 requiring chronic dialysis (N18.6) N18.6
  9. N18.6
    End stage renal disease
    BillableMCC326
    Inclusion terms 1, Use additional code 1

    Inclusion terms

    • Chronic kidney disease requiring chronic dialysis

    Use additional code

    • code to identify dialysis status (Z99.2) Z99.2
  10. N18.9
    Chronic kidney disease, unspecified
    Billable
    Inclusion terms 5

    Inclusion terms

    • Chronic renal disease
    • Chronic renal failure NOS
    • Chronic renal insufficiency
    • Chronic uremia NOS
    • Diffuse sclerosing glomerulonephritis NOS

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At N18

Code first

  • any associated:
  • diabetic chronic kidney disease (E08.22, E09.22, E10.22, E11.22, E13.22) E08.22 E09.22 E10.22 E11.22 E13.22
  • hypertensive chronic kidney disease (I12.-, I13.-) I12 I13

Use additional code

  • code, if applicable, to identify:
  • associated cachexia (E88.A) E88.A
  • kidney transplant status (Z94.0) Z94.0

Notes that also apply

Block N17-N19 instructions (Excludes2 11): printed on the block page.

Chapter 14 instructions (Excludes2 8): printed on the chapter 14 page.

Index entries

  • Disease, diseasedend stage renal (ESRD) → N18.6
  • Apoplexia, apoplexy, apoplecticuremic → N18.9 [I68.8]
  • Glomerulonephritissclerosing, diffuse → N18.9
  • Neuropathy, neuropathicuremic → N18.9 [G63]
  • Paralysis, paralytic (complete) (incomplete)uremic → N18.9 [G99.8]
  • Pericarditis (with decompensation) (with effusion)uremic → N18.9 [I32]
  • Retinitisalbuminurica → N18.9 [H32]
  • Retinitisrenal → N18.9 [H32]
  • Syndromeuremia, chronic → N18.9
  • Uremia, uremicchronic NOS → N18.9
  • Disease, diseasedrenal (functional) (pelvis)end-stage (failure) → N18.6
  • Failure, failedrenalend stage (chronic) → N18.6
  • Disease, diseasedkidney (functional) (pelvis)chronic → N18.9
  • Disease, diseasedrenal (functional) (pelvis)chronic → N18.9
  • Failure, failedrenalchronic → N18.9
  • Glomerulonephritisdiffusesclerosing → N18.9
  • Insufficiency, insufficientkidneychronic → N18.9
  • Insufficiency, insufficientrenal (acute)chronic → N18.9
  • Polyneuropathy (peripheral)in (due to)uremia → N18.9 [G63]
  • Uremia, uremicwithpolyneuropathy → N18.9 [G63]
  • Disease, diseasedkidney (functional) (pelvis)chronicstage 1 → N18.1
  • Disease, diseasedkidney (functional) (pelvis)chronicstage 2 (mild) → N18.2
  • Disease, diseasedkidney (functional) (pelvis)chronicstage 3 (moderate) → N18.30
  • Disease, diseasedkidney (functional) (pelvis)chronicstage 3a → N18.31
  • Disease, diseasedkidney (functional) (pelvis)chronicstage 3b → N18.32
  • Disease, diseasedkidney (functional) (pelvis)chronicstage 4 (severe) → N18.4
  • Disease, diseasedkidney (functional) (pelvis)chronicstage 5 → N18.5

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy