What this page covers
Post-acute is the setting most transformed by the Medicare Advantage PA wave. When patients aged into traditional Medicare, SNFs got paid on the SNF PPS with minimal PA. Now over 50 percent of Medicare beneficiaries are in MA, and MA plans PA almost every SNF admission, apply concurrent review to length-of-stay, and often shorten stays below clinical norms. Home health faces PDGM-aligned PA and recert. LTACH and IRF face admission PA and concurrent review. Hospice faces eligibility and recert PA. This page walks all five settings.
The Medicare Advantage PA wave in post-acute
Traditional Medicare Part A covers SNF after a qualifying 3-day hospital stay with no PA. MA plans are legally allowed to apply PA to SNF if their coverage criteria do not exceed traditional Medicare criteria, but in practice most MA plans apply PA with InterQual or MCG skilled-level criteria that restrict admission and shorten stays. CMS-0057-F applies to MA PA and mandates 72-hour urgent and 7-day standard turnaround, plus FHIR-based ePA by January 2027. The 2024 CMS final rule on MA coverage criteria (CMS-4201-F) also requires MA plans to use traditional Medicare criteria for coverage decisions, which has reduced but not eliminated the delta.
The operational impact is dramatic. A hospital discharge planner who could once send a patient to SNF on a Friday afternoon now has to sit on hold with a MA UM nurse. A SNF admissions coordinator receives referrals that require PA before the patient leaves the hospital, often on a weekend. Flexbone automates the admission PA submission and concurrent review on behalf of the SNF, freeing clinical staff from portal and phone work.
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Skilled nursing facility PA
SNF admission PA under MA typically requires: the qualifying hospital stay documentation, skilled-nursing or skilled-therapy need per InterQual or MCG (wound care, IV therapy, rehab intensity, complex medication management), and a proposed length of stay. Concurrent review happens every 5-7 days with updated clinical status, rehab minutes, and continued skilled need. A typical MA SNF stay is now 12-18 days, down from 25+ days under traditional Medicare, because concurrent review forces discharge when skilled criteria are no longer met.
SNF PA submissions flow through payer portals (Availity for many, direct for UHC, Naviage and Evicore in some contracts) or phone. Documentation usually includes the MDS (Minimum Data Set), therapy notes, nursing notes, wound documentation, and medication reconciliation. Daily nursing huddles feed the concurrent review packet. Flexbone reads from the SNF EHR (PointClickCare, MatrixCare, American HealthTech) and submits the concurrent packet on cadence.
Home health PA and PDGM
Home health under Medicare traditional operates under PDGM (Patient-Driven Groupings Model) with 30-day payment periods. Commercial and MA home health requires PA for most lines, with some state variation. Oasis assessment, 485 plan-of-care certification, and physician face-to-face encounter documentation are the core packet elements. Re-authorization at the 30-day PDGM boundary is standard, with continued PA for ongoing episodes.
Home health billing and PA EHRs: Homecare Homebase (HCHB), PointClickCare Home Health, WellSky, Netsmart myUnity Home Care, ALayaCare, TELUS Health.
LTACH and IRF PA
Long-term acute care hospitals (LTACH) have strict admission criteria under Medicare: site-neutral payment, 25 percent rule, and specific DRG restrictions. Commercial and MA LTACH PA applies InterQual or MCG LTACH criteria, which are tighter than most other post-acute settings. Typical admissions: prolonged ventilator weaning, complex wound care, medically complex post-surgical.
Inpatient rehabilitation facility (IRF) PA requires the 60 percent rule compliance at the facility level and individual admission criteria: 3 hours of therapy per day, medical complexity, improvement potential. Most common admissions: post-stroke, TBI, spinal cord injury, major joint replacement with complications, amputation rehab. Concurrent review applies similar to SNF.
Hospice eligibility and recertification
Hospice under Medicare Part A requires terminal prognosis of 6 months or less if the disease follows its expected course. Initial certification, 90-day recert, 60-day recert, and 60-day recert periods follow with face-to-face encounters after the third benefit period. MA plans hospice is carve-out to traditional Medicare hospice, though that is changing with the VBID hospice carve-in demonstration. Documentation requires local coverage determination (LCD) diagnosis-specific criteria, functional assessment, and decline documentation.
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Payer-specific post-acute rules
| Payer | SNF PA approach | Home health PA |
|---|---|---|
| UHC MA (Dual Special Needs and regular MA) | In-house naviHealth and new UHC programs, strict concurrent review | naviHealth / UHC direct |
| Humana MA | Humana At Home and contracted UM vendors | Humana direct |
| Aetna MA | In-house plus CarePartner | Aetna direct |
| Anthem BCBS MA | Carelon Post-Acute | Carelon |
| Kaiser (Medicare) | Integrated; no external PA | Integrated |
| Traditional Medicare | No admission PA; claim-based | PDGM payment, no traditional PA |
Post-acute EHRs
Detailed breakdown at post-acute EHRs for PA. Systems covered: PointClickCare, MatrixCare (CareHub, ResidentCare, Clinical), American HealthTech, Netsmart myUnity (Home Care, Senior Living, Hospice), WellSky, MDI Achieve, SigmaCare, AOD (Cantata Health), Homecare Homebase, ALayaCare, TELUS Health.
How Flexbone handles post-acute PA
Flexbone runs post-acute PA as a concurrent-review workflow from the SNF or home health EHR, not as a one-shot admission submission. The system ingests the daily clinical update, maps it to the payer\u2019s InterQual or MCG criteria, submits the concurrent review packet on cadence, and manages length-of-stay negotiation with payer UM nurses through the voice agent. See PA workflow and the platform.
The SNF LOS war. MA plans push to discharge sooner than clinical criteria support. SNF clinical teams push back with documentation. The voice agent can handle the routine payer UM calls, escalating to the clinician only when the payer UM nurse asks for physician-level input. That removes hours per day from SNF DON and MDS coordinator workload.