May 22, 2025
How to code a hepatic thrombus that extends into the atrium.
Two codes would be used:
- I82.0 hepatic vein thrombosis
- I51.3 Intracardiac thrombosis, NEC
When you index thrombus, you are directed to see thrombosis.
Thrombosis, atrium directs you to see also infarct, myocardium.
This patient did not have a myocardial infarction, therefore it would NOT be appropriate to code that. The sub terms below Thrombosis, atrium are as follows:
*Not resulting in infarction is most appropriate choice.
Atrial thrombosis is listed under I51.3. It says “old” after it in parentheses, but terms in parentheses may be present or absent in the disease you are coding. The terms in the parentheses should not determine whether you use the code or not. (nonessential modifier)
*each patient scenario is unique – code according to documentation*
References:
OCG Section I.A.7. nonessential modifiers
OCG Section IV.C. accurate reporting of ICD-10-CM diagnosis codes
