For skilled nursing leaders, recent Medicare Advantage reform was supposed to help.

Over the last several years, CMS has issued major Medicare Advantage policy updates aimed at bringing plan behavior closer to traditional Medicare standards. The objective was to curb many of the practices providers know too well: excessive prior authorization barriers, inconsistent coverage decisions, and payment denials that disrupt care and strain operations.

But across the SNF setting, many providers are asking the same question: if the rules changed, why does this still feel so hard?

That frustration is real. Nursing home administrators, directors of nursing, MDS leaders, therapy teams, admissions staff, and billers are still dealing with a patchwork of plan rules, portals, timelines, and documentation expectations. Even when the resident’s needs are clear, and even when the facility has strong clinical support, denials and premature terminations continue to consume time, revenue, and staff energy.

That is why the most useful question today is not simply, “What changed in the rule?” It is: Which citations are most useful when a plan says no?

Here are three that deserve a place in every SNF managed care toolkit.

1. 42 CFR § 422.138(c): An approved authorization should not be undone later without a valid basis

This is one of the strongest citations available when a plan approves care upfront and then later refuses payment on medical-necessity grounds.

CMS established that once a Medicare Advantage plan approves a covered item or service through prior authorization or a pre-service coverage determination, that approval is not supposed to be casually revisited later. In practical terms, if the service remained medically necessary, the plan should not reverse course after care has already been delivered unless there is a narrow, permissible reason such as fraud or a reopening basis recognized by regulation.

For SNFs, this citation is especially helpful in the all-too-common situation where admission or continued services were authorized, only for the claim to be challenged later. In those cases, the facility is not starting from zero. The fact that the plan already approved the care matters.

2. 42 CFR § 422.626(c) and (e): A plan that cuts services short has to clearly support that decision

When a Medicare Advantage plan tries to end coverage for a skilled stay or other services, the facility should not treat the notice as the final word.

These provisions matter because they place responsibility on the plan to justify why coverage should stop, and they require more than a vague conclusion. The explanation must be concrete enough to show why the services no longer qualify and what coverage standards the plan is relying on.

That becomes very important when the resident still has physician-supported skilled needs, nursing complexity, rehabilitation goals, or unresolved discharge issues. Terms like “custodial,” “plateaued,” or “no longer meets criteria” may be common in notices, but on their own they do not answer the real question: what Medicare-based standard is the plan applying, and how does the record fail to meet it?

That is where strong interdisciplinary documentation and a structured appeal can shift the conversation.

3. 42 CFR § 422.101(b): Medicare Advantage plans cannot rely on stricter private standards in place of Medicare rules

This is often the key citation when the denial seems to be driven by the plan’s own internal playbook rather than Medicare coverage rules.

CMS has made clear that for basic Medicare benefits, MA plans must ground their medical-necessity decisions in applicable Medicare coverage standards. In other words, the benchmark is not whatever unpublished internal screen or proprietary process a plan prefers to use. The benchmark is the Medicare framework that governs coverage.

For providers, this is a crucial distinction. It allows the facility to bring the discussion back to the resident’s condition, the skilled services being furnished, and the Medicare authorities that should control the decision. When the facts support skilled coverage under Medicare rules, the facility has firmer footing than many teams realize.

What SNF leaders can take from this

The lesson is not that facilities need to become regulatory scholars overnight. It is that success in managed care increasingly depends on having a repeatable response process.

That means knowing which citations carry weight. It means building documentation habits that support continued skilled need. It means recognizing when a denial rests on shaky reasoning. And it means giving staff a framework they can use without reinventing the response every time a different plan takes a different approach.

The provider is still doing the hard part: caring for the resident, coordinating across disciplines, and trying to preserve both access and reimbursement in a fragmented system. What many organizations need now is not more theory, but a more workable way to respond when managed care friction starts to overwhelm internal teams.

At Celtic, that is exactly what our Managed Care Resolution Services are designed to address. Recent data has shown that roughly 8 in 10 appealed Medicare Advantage denials are overturned, reinforcing what many providers already suspect: too many denials should not stand unchallenged. If your organization is not seeing outcomes in that range, or if your team is too stretched to pursue every appeal worth filing, it may be time to rethink how those denials are being managed.