Hi Pat-
The surgical tray code I use is A4550. Take a look at it, and see if it works for your needs. While you can't bill it to Medicare in an office setting as you say, there are a few commercial insurances that will allow and pay for the code. BCBS is one in my area, for example.
As for ICD-10 training, etc...what I have done to prepare was to make sure my office's software was upgraded to include the ICD-10 codes, purchased the Optum ICD-10 Mappings book, then figured out what the top 50 dx codes our office billed to put on a cheat-sheet if needed, and converted all the dx codes on our superbills over to ICD-10, for future use. As we get closer to the time of the conversion(if it happens, which I am still doubtful about at times), I will educate my doctor on the most used codes for our office. The provider I work for is very thorough with her documentation already, but I have explained to her the concept of initial, subsequent, sequelae. Here is a little info about what doctors need to be aware of:
http://www.cms.gov/Medicare/Coding/ICD10/Downloads/ICD-10-News-Documentaton-and-ICD-10%5B1%5D.pdf