2027 ICD-10-CM Diagnosis Code D49.512Neoplasm of unspecified behavior of left kidney
ICD-10-CM Codes›C00–D49›D49›D49
- Billable — Valid for Submission
- Not Chronic
D49.512 is a billable ICD-10-CM diagnosis code for neoplasm of unspecified behavior of left kidney. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 656 through 658, 686 through 688. Coders also document this condition as bilateral neoplasm of kidneys. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neoplasms of unspecified nature or uncertain behavior.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Bilateral neoplasm of kidneys
- Neoplasm of left kidney
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to D49.512: its own notes plus those printed at D49 and Chapter 2. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- 'growth' NOS
- neoplasm NOS
- new growth NOS
- tumor NOS
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Notes
General instructions on how these codes are used.
- 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.
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name D49.512, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming D49.512: they are not reported together with it, unless the two conditions are unrelated.
- Block D37-D48 Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromesneoplasms of unspecified behavior (D49.-) names D49.-, which includes this code
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Table of NeoplasmsClinical
Anatomical sites in the Table of Neoplasms that reference this code family.
| Site | Malig. Primary | Malig. Secondary | Ca in situ | Benign | Uncertain | Unspec. |
|---|---|---|---|---|---|---|
| calyx, renal | C65. | C79.0 | D09.19 | D30.1 | D41.1 | D49.51 |
| kidney (parenchymal) | C64. | C79.0 | D09.19 | D30.0 | D41.0 | D49.51 |
| kidney (parenchymal) › calyx | C65. | C79.0 | D09.19 | D30.1 | D41.1 | D49.51 |
| kidney (parenchymal) › hilus | C65. | C79.0 | D09.19 | D30.1 | D41.1 | D49.51 |
| kidney (parenchymal) › pelvis | C65. | C79.0 | D09.19 | D30.1 | D41.1 | D49.51 |
| parenchyma, kidney | C64. | C79.0 | D09.19 | D30.0 | D41.0 | D49.51 |
| pelvis, pelvic › renal | C65. | C79.0 | D09.19 | D30.1 | D41.1 | D49.51 |
| renal | C64. | C79.0 | D09.19 | D30.0 | D41.0 | D49.51 |
| renal › calyx | C65. | C79.0 | D09.19 | D30.1 | D41.1 | D49.51 |
| renal › hilus | C65. | C79.0 | D09.19 | D30.1 | D41.1 | D49.51 |
| renal › parenchyma | C64. | C79.0 | D09.19 | D30.0 | D41.0 | D49.51 |
| renal › pelvis | C65. | C79.0 | D09.19 | D30.1 | D41.1 | D49.51 |
Convert D49.512 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code History & ChangesHistory
Replacement D49.512 replaces the following previously assigned code(s):
- D49.5 - Neoplasm of unsp behavior of other genitourinary organs
Questions About D49.512Overview
What is the ICD-10 code for neoplasm of unspecified behavior of left kidney?
The ICD-10-CM code for neoplasm of unspecified behavior of left kidney is D49.512 (sometimes written as D49512). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is D49.512 (Neoplasm of unspecified behavior of kidney) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report neoplasm of unspecified behavior of left kidney on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does D49.512 group to?
When neoplasm of unspecified behavior of left kidney is the principal diagnosis on an inpatient stay, it groups to MS-DRG 656, 687, 658, 657, 686, 688, with relative weights from 0.7332 to 3.2782 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of D49.512?
Under the General Equivalence Mappings, neoplasm of unspecified behavior of left kidney converts to ICD-9-CM 239.5 (other gu neoplasm NOS). The mapping is approximate, so confirm the match fits the documentation.
