I45.5
Billable codeOther specified heart block
The ICD-10 code for other specified heart block is I45.5.
Clinical notes
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 block NOS (I45.9)
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Sinoatrial block
- Sinoauricular block
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.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- I45.0Right fascicular block
- I45.1Other and unspecified right bundle-branch blocknon-billable header
- I45.2Bifascicular block
- I45.3Trifascicular block
- I45.4Nonspecific intraventricular block
- I45.6Pre-excitation syndrome
- I45.8Other specified conduction disordersnon-billable header
- I45.9Conduction disorder, unspecified
- I45.5Other specified heart block
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 4266
Associated MS-DRGs
I45.5 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.