2027 ICD-10-CM Diagnosis Code I52Other heart disorders in diseases classified elsewhere

ICD-10-CM Codes›I00–I99›I30-I5A›I52

ICD-10-CM I52
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

I52 is a billable ICD-10-CM diagnosis code for other heart disorders in diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 302 through 303. The code is a manifestation code that cannot be reported as the principal diagnosis. Coders also document this condition as diffuse disease of coronary artery. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other and ill-defined heart disease.

Code Identity

ICD-10-CM Code
I52
Billable Status
Yes — Valid for Submission
Code Describes
Other heart disorders in diseases classified elsewhere
Short Description
Other heart disorders in diseases classified elsewhere
Same as the full description in the CMS dataset.
Chapter
I30-I5A
Other forms of heart disease

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI30-I5AOther forms of heart disease
CategoryI52Other heart disorders in diseases classified elsewhere
This CodeI52Other heart disorders in diseases classified elsewhere

Code EditsBilling

Medicare Code Editor checks that affect claim validity for I52.

Manifestation diagnoses
Manifestation codes describe the manifestation of an underlying disease, not the disease itself, and therefore should not be used as a principal diagnosis.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Diffuse disease of coronary artery
  • Disorder of heart due to systemic lupus erythematosus
  • Ectatic coronary artery
  • Luminal irregularities of coronary artery
  • Mild intimal coronary irregularities without significant stenoses
  • Restenotic lesion of coronary artery
  • Subpulmonary stenosis
  • Ulcer of artery
  • Ulcer of lesion of coronary artery

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I52: its own notes plus those printed at Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • heart disease (in):
  • gonococcal infection (A54.83)
  • meningococcal infection (A39.50)
  • rheumatoid arthritis (M05.31)
  • syphilis (A52.06)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Code First

The underlying condition named in the note is sequenced before this code.

  • underlying disease, such as:
  • congenital syphilis (A50.5)
  • mucopolysaccharidosis (E76.3)
  • schistosomiasis (B65.0-B65.9)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR CIR015
Other and ill-defined heart disease
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Heart Diseases

Heart disease is a general term that includes many types of heart problems. It's a type of cardiovascular disease, which means heart and blood vessel disease.

The full article covers:

  • What is heart disease?
  • What are the types of heart disease?
  • What causes heart diseases?
  • Who is more likely to develop heart diseases?
  • What are the symptoms of heart disease?
  • How are heart diseases diagnosed?
  • What are the treatments for heart disease?
  • Can heart diseases be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert I52 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
429.9 Heart disease NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I52Overview

What is the ICD-10 code for other heart disorders in diseases classified elsewhere?

The ICD-10-CM code for other heart disorders in diseases classified elsewhere is I52. It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is I52 (Other heart disorders in diseases classified elsewhere) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other heart disorders in diseases classified elsewhere on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does I52 group to?

On inpatient claims, other heart disorders in diseases classified elsewhere maps to MS-DRG 302, 303, with relative weights from 0.6610 to 1.1993 depending on complications. Higher weights mean higher Medicare reimbursement.

Can I52 be a principal diagnosis?

No. This is a manifestation code: other heart disorders in diseases classified elsewhere describes the manifestation of an underlying disease rather than the disease itself, so the underlying condition is sequenced first.

Can I52 be reported with A54.83?

Not as a rule. The Excludes1 note on I52 lists "gonococcal infection (A54.83)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).