2026 ICD-10-CM Diagnosis Code R82.4Acetonuria

ICD-10-CM Codes›R00–R99›R80-R82›R82

ICD-10-CM R82.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R82.4 is a billable ICD-10-CM diagnosis code for acetonuria. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 640 through 641. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Genitourinary signs and symptoms.

Code Identity

ICD-10-CM Code
R82.4
Billable Status
Yes — Valid for Submission
Code Describes
Acetonuria
Short Description
Acetonuria
Same as the full description in the CMS dataset.
Parent Code
R82
Other and unspecified abnormal findings in urine

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR80-R82Abnormal findings on examination of urine, without diagnosis
CategoryR82Other and unspecified abnormal findings in urine
This CodeR82.4Acetonuria

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acetonuria
  • Ketonuria
  • Urine ketone test = +
  • Urine ketone test = ++
  • Urine ketone test = +++
  • Urine ketone test = ++++
  • Urine ketone test = trace

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Ketonuria

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Abnormal, abnormality, abnormalities
      • urine (constituents)
        • ketones
    • Acetonuria
    • Findings, abnormal, inconclusive, without diagnosis
      • acetonuria
    • Findings, abnormal, inconclusive, without diagnosis
      • ketonuria
    • Findings, abnormal, inconclusive, without diagnosis
      • urine
        • acetone
    • Findings, abnormal, inconclusive, without diagnosis
      • urine
        • ketone
    • Ketonuria

Clinical ClassificationClinical

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

CCSR SYM011
Genitourinary signs and symptoms
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Classical Phenylketonuria|CPKU|Phenylalanine Hydroxylase Deficiency

    a genetic disorder caused by a mutation in the gene that encodes the enzyme phenylalanine hydroxylase, resulting in a severe form of phenylketonuria.

  • Ketonuria

    the presence of ketone bodies in the urine.

  • Phenylketonuria|PKU|PKU|phenylketonuria

    an autonomic recessive genetic disorder characterized by the body's inability to metabolize and utilize the amino acid phenylalanine, resulting in mental retardation, behavioral and movement problems, seizures, and developmental delays.

  • Phenylketonuria|PKU|PKU|Persistent hyperphenylalaninemia|phenylketonuria

    an autonomic recessive genetic disorder characterized by the body's inability to metabolize and utilize the amino acid phenylalanine, resulting in mental retardation, behavioral and movement problems, seizures, and developmental delays.

Patient EducationClinical

Urine and Urination

Your kidneys make urine by filtering wastes and extra water from your blood. The waste is called urea. Your blood carries it to the kidneys. From the kidneys, urine travels down two thin tubes called ureters to the bladder. The bladder stores urine until you are ready to urinate.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert R82.4 to ICD-9-CMHistory

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

ICD-9-CM
791.6 Acetonuria
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About R82.4Overview

Is R82.4 (Other and unspecified abnormal findings in urine) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report acetonuria on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does R82.4 group to?

When acetonuria is the principal diagnosis on an inpatient stay, it groups to MS-DRG 640, 641, with relative weights from 0.7782 to 1.3356 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R82.4 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the acetonuria is established, that condition takes the principal position instead.

What is the ICD-9 equivalent of R82.4?

Under the General Equivalence Mappings, acetonuria converts to ICD-9-CM 791.6 (acetonuria). The mapping is a direct match.

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.