There is no place in the 837 to report a Category of Service. 

NYSDOH derives the Category of Service from other information in your transmission. 

For more information on this topic please consult the document Transaction Category of Service Crosswalk available for download at nyhipaadesk.com under Crosswalks. This crosswalk is applicable to all 837 transactions. If you need further help please contact us by calling the eMedNY Call Center at (800) 343-9000, or by using the issues link on this website, or send us an Email and we will be glad to help.