2026 ICD-10-CM Diagnosis Code R01.2Other cardiac sounds

ICD-10-CM Codes›R00–R99›R00-R09›R01

ICD-10-CM R01.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R01.2 is a billable ICD-10-CM diagnosis code for other cardiac sounds. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 314 through 316. 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 Circulatory signs and symptoms.

Code Identity

ICD-10-CM Code
R01.2
Billable Status
Yes — Valid for Submission
Code Describes
Other cardiac sounds
Short Description
Other cardiac sounds
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 CodeR01.2Other cardiac sounds

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abnormal first heart sound, S>1<
  • Abnormal fourth heart sound, S>4<
  • Abnormal second heart sound, S>2<
  • Abnormal third heart sound, S>3<
  • Absent second heart sound, S>2<
  • Accentuated split of second heart sound, S>2<
  • Added heart sounds
  • Aortic ejection sound
  • Atrial sound
  • Cardiac dullness to percussion diminished
  • Cardiac dullness to percussion increased
  • Cardiac thrill
  • Closing click of prosthetic valve
  • Continuous cardiac thrill
  • Diastolic cardiac thrill
  • Diastolic rumble
  • Diminished split of second heart sound, S>2<
  • Early high pitched third sound
  • Early opening snap
  • Ejection click
  • Finding of first heart sound
  • Finding of palpation of heart
  • Finding of second heart sound
  • Finding related to cardiac dullness to percussion
  • First heart sound split
  • Fixed split of second heart sound
  • Fourth heart sound, S>4<, inaudible
  • Fourth sound gallop
  • Gallop rhythm
  • Hamman's sign
  • Heart sound inaudible
  • Heart sound volume variable
  • Heart sounds abnormal
  • Heart sounds different
  • Heart sounds diminished
  • Heart sounds exaggerated
  • Loud first heart sound
  • Mid-systolic click
  • Multiple non-ejection systolic clicks
  • Opening click of prosthetic valve
  • Opening snap
  • Palpable mitral first sound
  • Pericardial knock
  • Physiological split of second heart sound
  • Precordial friction
  • Prosthetic valve sound
  • Prosthetic valve sound muffled
  • Protodiastolic gallop
  • Pulmonic ejection sound
  • Reduced intensity of first heart sound, S>1<
  • Reverse split of second heart sound
  • Reversed split of first heart sound, S>1<
  • Second heart sound split
  • Single non-ejection systolic click
  • Splitting of heart sounds
  • Summation gallop
  • Systolic cardiac thrill
  • Systolic ejection sound
  • Third heart sound
  • Third heart sound inaudible
  • Third sound gallop
  • Thrill
  • Upper sternal shock
  • Volume of heart sounds - finding
  • Widened split of first heart sound, S>1<

Tabular List NotesGuidance

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

Inclusion Terms

  • Cardiac dullness, increased or decreased
  • Precordial friction

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
      • heart
        • sounds NEC
    • Dullness, cardiac(decreased) (increased)
    • Findings, abnormal, inconclusive, without diagnosis
      • heart
        • sounds
    • Fremitus, friction, cardiac
    • Friction
      • fremitus, cardiac
    • Friction
      • precordial
    • Split, splitting
      • heart sounds

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 R01.2 to ICD-9-CMHistory

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

ICD-9-CM
785.3 Abnorm heart sounds 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 R01.2Overview

Is R01.2 (Cardiac murmurs and other cardiac sounds) a billable code?

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

What MS-DRG does R01.2 group to?

When other cardiac sounds is the principal diagnosis on an inpatient stay, it groups to MS-DRG 314, 315, 316, with relative weights from 0.6821 to 2.0852 depending on complications. Higher weights mean higher Medicare reimbursement.

Can R01.2 be a principal diagnosis?

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

What is the ICD-9 equivalent of R01.2?

Under the General Equivalence Mappings, other cardiac sounds converts to ICD-9-CM 785.3 (abnorm heart sounds 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.