2026 ICD-10-CM Diagnosis Code R01.0Benign and innocent cardiac murmurs

ICD-10-CM Codes›R00–R99›R00-R09›R01

ICD-10-CM R01.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R01.0 is a billable ICD-10-CM diagnosis code for benign and innocent cardiac murmurs. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 306 through 307. 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 functional heart murmur. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Circulatory signs and symptoms.

Code Identity

ICD-10-CM Code
R01.0
Billable Status
Yes — Valid for Submission
Code Describes
Benign and innocent cardiac murmurs
Short Description
Benign and innocent cardiac murmurs
Same as the full description in the CMS dataset.
Parent Code
R01
Cardiac murmurs and other cardiac sounds

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR00-R09Symptoms and signs involving the circulatory and respiratory systems
CategoryR01Cardiac murmurs and other cardiac sounds
This CodeR01.0Benign and innocent cardiac murmurs

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Functional heart murmur
  • Neonatal innocent cardiac murmur
  • Venous hum

Tabular List NotesGuidance

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

Inclusion Terms

  • Functional cardiac murmur

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.

    • Murmur(cardiac) (heart) (organic)
      • benign
    • Murmur(cardiac) (heart) (organic)
      • functional
    • Murmur(cardiac) (heart) (organic)
      • innocent
    • Murmur(cardiac) (heart) (organic)
      • nonorganic

Clinical ClassificationClinical

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

CCSR SYM012
Circulatory signs and symptoms
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Congenital Heart Defects

Congenital heart defects (CHDs) are problems with the structure of the heart. "Congenital" means that that the problems are present at birth. These defects happen when a fetus's heart doesn't develop normally during pregnancy. Congenital heart defects are the most common type of birth defect.

The full article covers:

  • What are congenital heart defects?
  • What causes congenital heart defects?
  • Who is more likely to have a baby with a congenital heart defect?
  • What are the symptoms of congenital heart defects?
  • What other problems do congenital heart defects cause?
  • How are congenital heart defects diagnosed?
  • What are the treatments for congenital heart defects?

Read the full article at MedlinePlus

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

Convert R01.0 to ICD-9-CMHistory

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

ICD-9-CM
785.2 Cardiac murmurs NEC
Approximate The match is approximate rather than exact.

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 R01.0Overview

Is R01.0 (Cardiac murmurs and other cardiac sounds) a billable code?

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

What MS-DRG does R01.0 group to?

When benign and innocent cardiac murmurs is the principal diagnosis on an inpatient stay, it groups to MS-DRG 306, 307, with relative weights from 0.9132 to 1.5758 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R01.0 be a principal diagnosis?

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

What is the ICD-9 equivalent of R01.0?

Under the General Equivalence Mappings, benign and innocent cardiac murmurs converts to ICD-9-CM 785.2 (cardiac murmurs NEC). 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.