ICD-10 code for baseline EKG prior to chemotherapy treatment

[funcodingdiva]

Can anyone assist me in locating the correct payable ICD-10-CM code for a baseline EKG that was done prior to a patient starting chemotherapy treatment (Treanda/Rituxan).

I'm billing to Medicare and I know they are very picky about EKG's and the diagnosis codes to justify medical necessity.

Thanks for any help or advice you can give.