Coding "New-Onset" heart failure
We have received a denial for code I50.21 [Acute systolic (congestive) heart failure]. The only physician documentation that I can find in this record states, "New onset mild systolic congestive heart failure; left bundle branch block, mild left ventricular global hypokinesis." Also, I do not see the term "new onset" listed in the ICD-10-CM Alphabetic Index for heart failure nor in the Tabular List for this code. Am I missing something that the coder didn't? Or should a query have been sent for clarification?