N28.1 — Cyst of kidney, acquired

N28.1

ICD-10 Chapter 14: Genitourinary System — illustrative image — Chapter 14: Diseases of the genitourinary system (N00–N99) — illustrative image

What this code means

An acquired cyst of the kidney is a fluid-filled sac in the kidney, usually a simple cyst found on a scan.

Also called: kidney cyst, renal cyst, acquired cyst of kidney.

When this code is used

Used for cyst of kidney, acquired.

Where it sits in ICD-10-CM

Code N28.1 belongs to Chapter 14: Diseases of the genitourinary system, which covers codes N00–N99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related anatomy

Kidneys

Frequently asked questions

What is ICD-10-CM code N28.1?

N28.1 is the ICD-10-CM diagnosis code for “Cyst of kidney, acquired”. An acquired cyst of the kidney is a fluid-filled sac in the kidney, usually a simple cyst found on a scan.

When is code N28.1 used?

Used for cyst of kidney, acquired. It belongs to Chapter 14 of ICD-10-CM (Diseases of the genitourinary system).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.