ICD-10-CM 2027
ICD-10 code for Dullness
From the official ICD-10-CM alphabetic index entry “Dullness, cardiac (decreased) (increased)”. Page updated September 29, 2026.
About coding Dullness
The ICD-10-CM code for Dullness is R01.2 (Other cardiac sounds).
Within R01, choose R01.2 (Other cardiac sounds) only when documentation doesn't support a more specific option: benign and innocent cardiac murmurs (R01.0) and cardiac murmur, unspecified (R01.1).
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 314 (Other Circulatory System Diagnoses with MCC, relative weight 2.0873), DRG 315 (Other Circulatory System Diagnoses with CC, relative weight 0.9508) and DRG 316 (Other Circulatory System Diagnoses without CC/MCC, relative weight 0.6677), 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.
Common questions about Dullness ICD-10 codes
What is the ICD-10 code for Dullness?
- R01.2 — Other cardiac sounds.
Is R01.2 billable?
- Yes. R01.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R01.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R01.2 as a principal diagnosis.
Is R01.2 a CC or MCC?
- No. R01.2 is neither a CC nor an MCC under MS-DRG v44.0.