I'm not sure this helps, but below is the link to the 2019 OPPS final rule addendas. Addendum D1 and D2 contain the status indicators --- perhaps that is where you got the D1, D2?
Nevertheless, there isn't a SI S2 or an Addendum S2.
https://www.cms.gov/apps/ama/license.asp?file=/Medicare/Medicare-Fee-for-Service-Payment/HospitalOutpatientPPS/Downloads/CMS-1695-FC-2019-OPPS-FR-Addenda.zip------------------------------
Sheila Goethel
Coding Services Senior Manager
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Original Message:
Sent: 02-05-2019 10:55
From: Damaris Deleon
Subject: Payment Statud codes
Hi all,
Is anyone familiar with payment status codes or indicators such as D2,D1, S2?
I am not seeing these in the OPPS payment indicators.