I have a coding question from my office, I believe that we have some informed coders in our office and I would like to help clarify the confusion.

Since EMR has been implemented the doctors are memorizing the codes, and now are simply placing [428.0] as a diagnosis.

In the past I've always followed the rule that the doctor must write the diagnosis out, has this changed and it is now okay to code a numerical or symbol diagnoses?

If possible can you direct me to somewhere, where I can have written documentation in this matter?