I50.33 – Acute on chronic diastolic (congestive) heart failure

ICD-10-CM 2027 diagnosis code · Other forms of heart disease

Billable code

ICD-10-CM code I50.33
Code
I50.33 (claims format: I5033)
Description
Acute on chronic diastolic (congestive) heart failure
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
I50 › I50.3

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

I50 – Heart failure

Excludes2 (not included here):
  • cardiac arrest (I46.-)
  • neonatal cardiac failure (P29.0)
Code first:
  • heart failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.8)
  • heart failure due to hypertension (I11.0)
  • heart failure due to hypertension with chronic kidney disease (I13.-)
  • heart failure following surgery (I97.13-)
  • obstetric surgery and procedures (O75.4)
  • rheumatic heart failure (I09.81)

I50.3 – Diastolic (congestive) heart failure

Applicable to:
  • Diastolic left ventricular heart failure
  • Heart failure with normal ejection fraction
  • Heart failure with preserved ejection fraction [HFpEF]
Excludes1 (not coded here):
  • combined systolic (congestive) and diastolic (congestive) heart failure (I50.4-)
Code also:
  • end stage heart failure, if applicable (I50.84)

Index terms for I50.33

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in I50.3

Frequently asked questions

What is ICD-10 code I50.33?

I50.33 is the ICD-10-CM code for acute on chronic diastolic (congestive) heart failure, in the block I30-I5A (Other forms of heart disease).

Is I50.33 a billable code?

Yes. I50.33 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does I50.33 belong to?

It belongs to category I50 – Heart failure.

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.