Within the 837 guides, PWK02 code EL states: EL Electronically Only - Indicates that the attachment is being transmitted in a separate X12 functional group.
Our interpretation is that EL is used to identify an attachment sent using a 275. Is that a correct interpretation?
Can EL be used to indicate an attachment that is available at another location or that is available through another electronic method such as a vendor portal?
Your interpretation is correct. The PWK02 Qualifier, “EL” is required when attachments are sent electronically in another X12 functional group such as a 275 transaction. The Qualifier note does not allow for another electronic method to be used unsolicited. However, the Qualifier, “AA” may be used to indicate that the additional information is not being sent with the claim, and is instead available by request. The means by which the additional information is made available is not dictated by X12 and can be mutually agreed upon by the parties.
If you have a business need not supported in a published TR3, you may submit an ASC X12 change request for consideration in a future version of the TR3. Change requests are submitted at http://changerequest.x12.org/