ICD-10-CM 2027
ICD-10 code for endocarditis ulcer
From the official ICD-10-CM alphabetic index entry “Ulcer, ulcerated, ulcerating, ulceration, ulcerative › endocarditis (acute) (chronic) (subacute)”. Page updated September 29, 2026.
About coding endocarditis ulcer
The ICD-10-CM code for endocarditis ulcer is I28.8 (Other diseases of pulmonary vessels).
Within I28, choose I28.8 (Other diseases of pulmonary vessels) only when documentation doesn't support a more specific option: arteriovenous fistula of pulmonary vessels (I28.0), aneurysm of pulmonary artery (I28.1) and disease of pulmonary vessels, unspecified (I28.9).
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 endocarditis ulcer ICD-10 codes
What is the ICD-10 code for endocarditis ulcer?
- I28.8 — Other diseases of pulmonary vessels.
Is I28.8 billable?
- Yes. I28.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I28.8 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I28.8 as a principal diagnosis.
Is I28.8 a CC or MCC?
- No. I28.8 is neither a CC nor an MCC under MS-DRG v44.0.