I51.81 — Takotsubo syndrome
I51.81 is a billable, specific ICD-10-CM code for takotsubo syndrome. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Reversible left ventricular dysfunction following sudden emotional stress
- Stress induced cardiomyopathy
- Takotsubo cardiomyopathy
- Transient left ventricular apical ballooning syndrome
Risk adjustment
I51.81 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
I51.81 is named in 28 Medicare coverage policies — 28 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A52868Billing and Coding: Transesophageal Echocardiography (TEE)
- A56423Billing and Coding: Cardiology Non-emergent Outpatient Stress Testing
How I51.81 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I51.81.
- Cardiomyopathy›stress induced
- Cardiomyopathy›takotsubo
- Dysfunction›left ventricular, following sudden emotional stress
- Syndrome›apical ballooning(transient left ventricular)
- Syndrome›takotsubo
- Syndrome›transient left ventricular apical ballooning
- Dysfunction›ventricular›left, reversible, following sudden emotional stress
Related codes at this level
Codes that share I51.8. If I51.81 is not quite right, the correct code is usually one of these.
Questions about I51.81
- Is I51.81 a billable ICD-10-CM code?
- Yes. I51.81 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I51.81 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Other forms of heart disease (I30-I5A).