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ICD-10-CM 2027 diagnosis code

R01.1Cardiac murmur, unspecified

✓ Billable / specific

R01.1 is a valid, billable ICD-10-CM code for cardiac murmur, unspecified. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for Murmur.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About R01.1

R01.1 is the ICD-10-CM diagnosis code for cardiac murmur, unspecified. It belongs to category R01 (cardiac murmurs and other cardiac sounds), block R00-R09 (symptoms and signs involving the circulatory and respiratory systems) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within R01, choose R01.1 (Cardiac murmur, unspecified) only when documentation doesn't support a more specific option: benign and innocent cardiac murmurs (R01.0) and other cardiac sounds (R01.2).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 306 (Cardiac Congenital and Valvular Disorders with MCC, relative weight 1.546) and DRG 307 (Cardiac Congenital and Valvular Disorders without MCC, relative weight 0.9148), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 785.2 (Undiagnosed cardiac murmurs).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Cardiac bruit NOS
  • Heart murmur NOS
  • Systolic murmur NOS

Notes that apply from higher levels

Instructions written at a parent level also apply to R01.1.

› From R01 Cardiac murmurs and other cardiac sounds
Excludes1
  • cardiac murmurs and sounds originating in the perinatal period (P29.8)

Broader instructions also apply from Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to R01.1.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 785.2Undiagnosed cardiac murmursapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about R01.1

Is R01.1 billable?

Yes. R01.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can R01.1 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict R01.1 as a principal diagnosis.

Is R01.1 a CC or MCC?

No. R01.1 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does R01.1 group to?

R01.1 is used in the MS-DRG v44.0 logic for MS-DRG 306 (Cardiac Congenital and Valvular Disorders with MCC) and MS-DRG 307 (Cardiac Congenital and Valvular Disorders without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for R01.1?

The CMS General Equivalence Mappings map R01.1 to ICD-9-CM 785.2.