I33.0 – Acute and subacute infective endocarditis
ICD-10-CM 2027 diagnosis code · Other forms of heart disease
ICD-10-CM code
I33.0
- Code
I33.0(claims format:I330)- Description
- Acute and subacute infective endocarditis
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 9. Diseases of the circulatory system (I00-I99)
- Block
- I30-I5A Other forms of heart disease
- Parent codes
- I33
Notes for I33.0
Applicable to:
- Bacterial endocarditis (acute) (subacute)
- Infective endocarditis (acute) (subacute) NOS
- Endocarditis lenta (acute) (subacute)
- Malignant endocarditis (acute) (subacute)
- Purulent endocarditis (acute) (subacute)
- Septic endocarditis (acute) (subacute)
- Ulcerative endocarditis (acute) (subacute)
- Vegetative endocarditis (acute) (subacute)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
I33 – Acute and subacute endocarditis
Index terms for I33.0
Entries in the ICD-10-CM alphabetic index that lead to this code:
- SBE
- Osler's nodes
- Node, Osler's
- Endocarditis, lenta
- Endocarditis, septic
- Endocarditis, mycotic
- Endocarditis, purulent
- Endocarditis, bacterial
- Endocarditis, malignant
- Endocarditis, vegetative
- Endocarditis, ulcerative
- Endocarditis, suppurative
- Endocarditis, constrictive
- Endocarditis, pneumococcal
- Endocarditis, streptococcal
- Vegetation, vegetative, heart
- Aneurysm, mycotic, endocardial
- Aneurysm, infective, endocardial
- Aneurysm, endocardial, infective
- Vegetation, vegetative, endocarditis
- Endocarditis, infectious or infective
- Arthropathy, in, infective endocarditis
- Endocarditis, due to, Serratia marcescens
- Endocarditis, acute or subacute, infective
- Infection, infected, infective, endocardium
Related codes in I33
Frequently asked questions
What is ICD-10 code I33.0?
I33.0 is the ICD-10-CM code for acute and subacute infective endocarditis, in the block I30-I5A (Other forms of heart disease).
Is I33.0 a billable code?
Yes. I33.0 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does I33.0 belong to?
It belongs to category I33 – Acute and subacute endocarditis.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.