N20.0

Calculus of kidney

Billable FY2026 2025-10-01 → 2026-09-30

Exclusions 10 never code together

N20code

Excludes1

Excludes2

certain conditions originating in the perinatal period (P04-P96)P04-P96
certain infectious and parasitic diseases (A00-B99)A00-B99
complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)Q00-Q99
endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
neoplasms (C00-D49)C00-D49
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 6

N20code

Inclusion terms

Inclusion terms

Index entries leading here 4

Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic) L02.91
- kidney N15.1
  - with calculus N20.0
Calculus, calculi, calculous
- diverticulum
  - kidney N20.0
- kidney (impacted) (multiple) (pelvis) (recurrent) (staghorn) N20.0
- pyelitis (impacted) (recurrent) N20.0
Infection, infected, infective (opportunistic) B99.9
- kidney (cortex) (hematogenous) N15.9
  - with calculus N20.0
Stone (s) — see also Calculus
- kidney N20.0
- renal N20.0

Alongside this code 3 same parent — N20

Additional references

AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

Present FY2024–FY2027.