2026 ICD-10-CM Diagnosis Code R82.1Myoglobinuria

ICD-10-CM Codes›R00–R99›R80-R82›R82

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

R82.1 is a billable ICD-10-CM diagnosis code for myoglobinuria. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 947 through 948. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 58 closely related codes. 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
R82.1
Billable Status
Yes — Valid for Submission
Code Describes
Myoglobinuria
Short Description
Myoglobinuria
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 CodeR82.1Myoglobinuria

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Autosomal dominant myoglobinuria
  • Genetic recurrent myoglobinuria
  • Haff syndrome
  • Idiopathic myoglobinuria
  • Lipid storage myopathy
  • March myoglobinuria
  • Myoglobinuria
  • Myoglobinuria following ingestion of eel
  • Recurrent myoglobinuria

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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

  • Myoglobinuria

    the presence of myoglobin in urine usually as a result of rhabdomyolysis.

  • Myoglobinuria

    the presence of myoglobin in the urine.

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 R82.1 to ICD-9-CMHistory

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

ICD-9-CM
791.3 Myoglobinuria
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 R82.1Overview

What is the ICD-10 code for myoglobinuria?

The ICD-10-CM code for myoglobinuria is R82.1 (sometimes written as R821). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is R82.1 (Other and unspecified abnormal findings in urine) a billable code?

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

What MS-DRG does R82.1 group to?

When myoglobinuria is the principal diagnosis on an inpatient stay, it groups to MS-DRG 947, 948, with relative weights from 0.8005 to 1.2694 depending on complications. Higher weights mean higher Medicare reimbursement.

Is R82.1 a CC or MCC?

CMS lists R82.1 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 58 closely related codes in its exclusion list.

Can R82.1 be a principal diagnosis?

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