OASIS Pay Source Change Rules Just Got Stricter: What Home Health Agencies Need to Do

When a home health patient switches payers in the middle of care, the paperwork question used to have a soft answer. On Oct. 20, CMS made it firm. A new resource on OASIS pay source change situations says that when the new payer requires a new start of care, agencies must complete a discharge OASIS under the old payer and a new start of care comprehensive assessment under the new one. That replaces earlier guidance that only recommended the discharge.

What the OASIS pay source change guidance actually requires

CMS boils the whole thing down to one question: does the new payer require a new start of care? If it does, the agency closes the old quality episode with a discharge assessment and opens a new one. Medicare fee-for-service is the clearest case. Any move from another payer into Medicare FFS now requires a new start of care. A move from Medicare FFS to skilled care under a Medicare Advantage plan does not, and neither does a shift where Medicare FFS goes from secondary to primary. Many other combinations, including moves into Medicaid or managed Medicaid, depend on what that payer requires. CMS is also clear that this is not a full readmission. Agencies do not have to redo the new-patient paperwork that comes with a true admission.

When skilled care ends but the patient stays

The guidance also closes a common gray area. When skilled services end under any payer, a discharge OASIS is required, even if the patient stays with the agency for non-skilled help such as personal care. Going the other direction, a patient moving from non-skilled to skilled care needs a start of care. CMS ties this to the all-payer OASIS expansion: with assessments now collected for skilled patients regardless of payer, each quality episode needs a clean beginning and end.

Where agencies tend to get caught

The clinical work here is not the hard part. The hard part is knowing that a payer change happened in time to schedule the right visit. Coverage changes often surface in billing or intake first, and the field clinician may not hear about it until after the next routine visit. A few habits help: have intake or billing flag every payer change the same day it is confirmed, keep a short internal table of which payers in your state require a new start of care, and make sure the clinician scheduled for the discharge and new start of care visit knows why that visit looks different. CMS also posted its October quarterly OASIS Q&As the same day, so it is worth having whoever owns OASIS accuracy read both together.

The bigger picture

This is a small document with real downstream effects. Episodes that never get closed properly can skew quality measures and create rework when assessments are rejected or questioned later. At CareSync®, we pay close attention to how changes like this land on the people doing the visits, because clear handoffs between the office and the field are usually what separates a smooth transition from a missed assessment. If your team has already built a workflow for payer changes, it is worth a fresh look against the new table this week.

Sources: CMS, Home Health Guidance Related to Pay Source Changes (Oct. 20, 2026); CMS Home Health QRP Spotlight and Announcements; CMS OASIS User Manuals.