2025 ICD-10-CM Diagnosis Code I38

Endocarditis, valve unspecified

• I38 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2025 edition of ICD-10-CM I38 became effective on October 1, 2024.
• This is the American ICD-10-CM version of I38 – other international versions of ICD-10 I38 may differ.

Type 1 Excludes

• congenital insufficiency of cardiac valve NOS (Q24.8)
• congenital stenosis of cardiac valve NOS (Q24.8)
• endocardial fibroelastosis (I42.4)
• endocarditis specified as rheumatic (I09.1)

Includes

• endocarditis (chronic) NOS
• valvular incompetence NOS
• valvular insufficiency NOS
• valvular regurgitation NOS
• valvular stenosis NOS
• valvulitis (chronic) NOS

The following code(s) above I38 contain annotation back-references

 that may be applicable to I38:

• I00-I99  Diseases of the circulatory system

Approximate Synonyms

• Chf (congestive heart failure) due to valvular disease
• Congestive heart failure due to valvular disease
• Endocarditis
• Heart valve disorder
• Valvular heart disease

Clinical Information

• Dysfunction of one of the cardiac valves with incomplete valve closure resulting in valvular regurgitation.
• Narrowing of the opening of one or more of the four valves of the heart.
• Regurgitation of the blood of the heart valves owning to imperfect closing, insufficiency or incompetency of the valves.

ICD-10-CM I38 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

• 306 Cardiac congenital and valvular disorders with mcc
• 307 Cardiac congenital and valvular disorders without mcc
• 791 Prematurity with major problems
• 793 Full term neonate with major problems

Convert I38 to ICD-9-CMCode History

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change
• 2020 (effective 10/1/2019): No change
• 2021 (effective 10/1/2020): No change
• 2022 (effective 10/1/2021): No change
• 2023 (effective 10/1/2022): No change
• 2024 (effective 10/1/2023): No change
• 2025 (effective 10/1/2024): No change

Code annotations containing back-references to I38:

• Type 1 Excludes: I09.1, I08, I33
• Type 2 Excludes: I08

Diagnosis Index entries containing back-references to I38:

• Disease, diseased – see also Syndrome
  • valve, valvular I38
• Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular) I38
  • arteriosclerotic I38
• Hypertrophy, hypertrophic
  • heart (idiopathic) – see also Hypertrophy, cardiac
    • valve I38 – see also Endocarditis
• Insufficiency, insufficient
  • valve, valvular (heart) I38
• Stenosis, stenotic (cicatricial) – see also Stricture
  • heart valve I38 – see also Endocarditis
  • valve (cardiac) (heart) I38 – see also Endocarditis
• Stricture – see also Stenosis
  • heart – see also Disease, heart
    • valve I38 – see also Endocarditis