Coding for EKG

I work for an organization that has a centralized billing office. I am an office manager for a 4 provider primary care group which includes 2 MD's and 2 NP's. Ordering NP's EKG's are read by the MD's same day. The question is how this can be billed to capture the read with out creating another encounter?

Maggie Dowling, CPC

Coding for EKG