ICD-10-CM 2027
ICD-10 code for murmur
From the official ICD-10-CM alphabetic index entry “Murmur (cardiac) (heart) (organic)”. Page updated September 29, 2026.
About coding murmur
The ICD-10-CM code for murmur is R01.1 (Cardiac murmur, unspecified). The official index lists 10 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R01.1.
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.
More specific murmur codes (official index)
- abdominal R19.15 — Other abnormal bowel sounds
- aortic (valve)
- benign R01.0 — Benign and innocent cardiac murmurs
- diastolic
- Flint I35.1 — Nonrheumatic aortic (valve) insufficiency
- functional R01.0 — Benign and innocent cardiac murmurs
- Graham Steell I37.1 — Nonrheumatic pulmonary valve insufficiency
- innocent R01.0 — Benign and innocent cardiac murmurs
- mitral (valve)
- nonorganic R01.0 — Benign and innocent cardiac murmurs
- presystolic, mitral
- pulmonic (valve) I37.8 — Other nonrheumatic pulmonary valve disorders
- systolic R01.1 — Cardiac murmur, unspecified
- tricuspid (valve) I07.9 — Rheumatic tricuspid valve disease, unspecified
- valvular
Common questions about murmur ICD-10 codes
What is the ICD-10 code for murmur?
- R01.1 — Cardiac murmur, unspecified. More specific codes apply when the documentation supports them: R19.15, R01.0, I35.1, R01.0 and others below.
What is the ICD-10 code for abdominal murmur?
- R19.15 — Other abnormal bowel sounds.
What is the ICD-10 code for benign murmur?
- R01.0 — Benign and innocent cardiac murmurs.
What is the ICD-10 code for flint murmur?
- I35.1 — Nonrheumatic aortic (valve) insufficiency.
What is the ICD-10 code for functional murmur?
- R01.0 — Benign and innocent cardiac murmurs.
What is the ICD-10 code for graham steell murmur?
- I37.1 — Nonrheumatic pulmonary valve insufficiency.
What is the ICD-10 code for innocent murmur?
- R01.0 — Benign and innocent cardiac murmurs.
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.