ANSI X12 837P - 5010 2300 PWK - Claim Supplemental Information

The PWK (Paperwork) segment in the 2300 loop of the X12 837 (5010) professional claim is used to indicate that additional documentation is being submitted or is available to support the healthcare claim. This segment links the claim to attachments such as medical records, operative notes, or consent forms.

The PWK segment is situational and should only be sent when required by the payer or trading partner. Always verify with the payer whether documentation is required, and follow their specific process for submitting it.

Sample 837P (5010) - 2300 PWK - Paperwork Segment

In the example PWK*OB*FX***AC*ACD123~:

• OB – Report Type Code indicating an Operative Note is being referenced.
• FX – Report Transmission Code specifying that the documentation was sent by fax.
• PWK03–PWK04 – Not used.
• AC – Identification Code Qualifier, meaning the value that follows is an Attachment Control Number.
• ACD123 – The Attachment Control Number used when sending the document via fax.

Important: Always coordinate with the payer or intermediary to ensure proper handling of documentation. Some entities may require the use of a specific control number format or submission method (e.g., fax, mail, or electronic attachment).

Note: The PWK segment should not be included unless documentation is required. Be sure to follow payer-specific guidance on submission formats and control number usage.