2026 ICD-10-CM Diagnosis Code R93.421Abnormal radiologic findings on diagnostic imaging of right kidney

ICD-10-CM Codes›R00–R99›R90-R94›R93

ICD-10-CM R93.421
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R93.421 is a billable ICD-10-CM diagnosis code for abnormal radiologic findings on diagnostic imaging of right kidney. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 695 through 696. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. Coders also document this condition as bilateral ultrasonography of kidneys abnormal. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Abnormal findings without diagnosis.

Code Identity

ICD-10-CM Code
R93.421
Billable Status
Yes — Valid for Submission
Code Describes
Abnormal radiologic findings on diagnostic imaging of right kidney
Short Description
Abnormal radiologic findings on dx imaging of r kidney
Parent Code
R93.42
Abnormal radiologic findings on diagnostic imaging of kidney

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR90-R94Abnormal findings on diagnostic imaging and in function studies, without diagnosis
CategoryR93Abnormal findings on diagnostic imaging of other body structures
This CodeR93.421Abnormal radiologic findings on diagnostic imaging of right kidney

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral ultrasonography of kidneys abnormal
  • Ultrasonography of abdomen abnormal
  • Ultrasonography of kidney abnormal
  • Ultrasonography of left kidney abnormal
  • Ultrasonography of right kidney abnormal

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR SYM017
Abnormal findings without diagnosis
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert R93.421 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
793.5 Nonsp abn find-gu organs
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement R93.421 replaces the following previously assigned code(s):

  • R93.4 - Abnormal findings on diagnostic imaging of urinary organs
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About R93.421Overview

Is R93.421 (Abnormal radiologic findings on diagnostic imaging of kidney) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report abnormal radiologic findings on diagnostic imaging of right kidney on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does R93.421 group to?

When abnormal radiologic findings on diagnostic imaging of right kidney is the principal diagnosis on an inpatient stay, it groups to MS-DRG 695, 696, with relative weights from 0.6890 to 1.1438 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R93.421 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the abnormal radiologic findings on diagnostic imaging of right kidney is established, that condition takes the principal position instead.

What is the ICD-9 equivalent of R93.421?

Under the General Equivalence Mappings, abnormal radiologic findings on diagnostic imaging of right kidney converts to ICD-9-CM 793.5 (nonsp abn find-gu organs). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.