I52: Other heart disorders in diseases classified elsewhere

Clinical notes

Code first

This code represents a manifestation of an underlying disease. Coding convention requires the underlying (etiology) code to be sequenced first, with this code listed second.

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

Excludes1 (not coded here)

An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).

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

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

•Laterality-specific codes exist for this condition — confirm the affected side is documented.
•Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
•This code represents a manifestation. Documentation should identify the underlying condition, which must be coded first.
•As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

Related codes in this category

ICD-9-CM equivalent

Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.

4299Approximate match

View full ICD-10 → ICD-9 crosswalk →

Associated MS-DRGs

I52 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.

Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.