ICD-10-CM 2027 diagnosis code

D49.51Neoplasm of unspecified behavior of kidney

Not billable — use a more specific code

D49.51 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code last changed in FY2017 (effective October 1, 2016). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About D49.51

D49.51 is the ICD-10-CM diagnosis code for neoplasm of unspecified behavior of kidney. It belongs to category D49 (neoplasms of unspecified behavior), block D49 (neoplasms of unspecified behavior) and chapter 2 (neoplasms). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within D49.5 (neoplasm of unspecified behavior of other genitourinary organs), D49.51 is specifically for neoplasm of unspecified behavior of kidney. Related codes cover other genitourinary organ (D49.59).

To report this condition, pick the subcode that matches the documentation: D49.511 (kidney), D49.512 (kidney) and D49.519 (kidney).

It was added in FY2017, effective October 1, 2016.

Specific codes under D49.51

Notes that apply from higher levels

Instructions written at a parent level also apply to D49.51.

› From D49 Neoplasms of unspecified behavior

Note

Category D49 classifies by site neoplasms of unspecified morphology and behavior. The term 'mass', unless otherwise stated, is not to be regarded as a neoplastic growth.

Includes

'growth' NOS
neoplasm NOS
new growth NOS
tumor NOS

Excludes2

neoplasms of uncertain behavior (D37-D44, D48)

Broader instructions also apply from Chapter 2: Neoplasms.

Table of Drugs & Neoplasms entries

Neoplasm, neoplastic › calyx, renal — Unspecified Behavior
Neoplasm, neoplastic › kidney (parenchymal) — Unspecified Behavior
Neoplasm, neoplastic › kidney (parenchymal) › calyx — Unspecified Behavior
Neoplasm, neoplastic › kidney (parenchymal) › hilus — Unspecified Behavior
Neoplasm, neoplastic › kidney (parenchymal) › pelvis — Unspecified Behavior
Neoplasm, neoplastic › parenchyma, kidney — Unspecified Behavior
Neoplasm, neoplastic › pelvis, pelvic › renal — Unspecified Behavior
Neoplasm, neoplastic › renal — Unspecified Behavior
Neoplasm, neoplastic › renal › calyx — Unspecified Behavior
Neoplasm, neoplastic › renal › hilus — Unspecified Behavior
Neoplasm, neoplastic › renal › parenchyma — Unspecified Behavior
Neoplasm, neoplastic › renal › pelvis — Unspecified Behavior

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2017 (effective 10/1/2016): Added
No changes since FY2017.

Common questions about D49.51

Is D49.51 billable?: No. D49.51 is a header code. Report one of its more specific subcodes instead.