What a readmission is
A readmission is an unplanned admission to an inpatient hospital that follows a previous discharge within a defined window. The most common window is 30 days, which is what the CMS Hospital Readmissions Reduction Program (HRRP) and the NCQA HEDIS Plan All-Cause Readmissions (PCR) measure both use. Planned readmissions, such as a scheduled chemotherapy admission or a staged surgical procedure, are generally excluded so the measure isolates the avoidable returns.
The 30-day window matters because readmission risk is highest in the days right after discharge. A return that happens on day 3 usually reflects something that went wrong in the handoff, not a new and unrelated illness, which is why the post-discharge period is where teams concentrate their effort.
Why readmissions matter in value-based care
Readmissions are expensive and frequently avoidable, and in value-based care the risk-bearing organization carries that cost directly. According to CMS, a readmission within 30 days of discharge is frequently avoidable and can lead to worse patient outcomes and higher costs, and a high readmission rate may signal inadequate quality of care or a lack of post-discharge coordination.
The financial and quality consequences run on two tracks. HRRP reduces Medicare payments to hospitals whose readmission rates for specific conditions exceed expected levels. For health plans and the risk-bearing groups they delegate to, the HEDIS PCR measure scores risk-adjusted all-cause readmissions and feeds quality ratings. Either way, lowering avoidable readmissions protects both quality scores and the cost side of a risk contract.
How readmissions are measured
Two programs define how readmissions are tracked, and they apply to different parties:
- CMS Hospital Readmissions Reduction Program (HRRP). A Medicare value-based purchasing program that penalizes hospitals with higher-than-expected 30-day readmission rates for a defined set of conditions. It is hospital-facing.
- NCQA HEDIS Plan All-Cause Readmissions (PCR). A plan-level measure that scores the risk-adjusted rate of unplanned 30-day readmissions for any cause across a health plan's members. It is plan-facing and reported as a CMS Star Ratings measure.
- Risk adjustment. Both approaches adjust for how sick the population is, so a plan or hospital serving a higher-acuity panel is not penalized simply for treating sicker patients. The comparison is against an expected rate, not a flat threshold.
How transitions-of-care follow-up reduces readmissions
Most avoidable readmissions come from a failed handoff: medications never reconciled, a warning sign nobody caught, or a follow-up visit that was never scheduled. Timely transitions-of-care follow-up is the intervention that catches these problems while they are still manageable.
- The discharge has to be known in real time. An ADT discharge event is the first signal a care team gets, and acting on it is what makes the rest of the follow-up possible.
- Early contact catches problems early. An interactive contact within 2 business days of discharge, the same window transitional care management requires, surfaces medication confusion and missed appointments before they escalate.
- A fast follow-up visit prevents the return. Scheduling a follow-up visit within 7 days of discharge is one of the most effective ways to prevent a readmission.
Common mistakes teams make with readmissions
- Learning about the discharge too late. Without a real-time ADT feed, the team finds out a patient went home days later, after the highest-risk window has already passed.
- Treating all discharges the same. A patient with multiple high-risk chronic conditions needs faster, closer follow-up than a routine discharge. Flat workflows spread effort evenly when risk is not even.
- Confusing the hospital measure with the plan measure. HRRP and PCR are different programs with different denominators. Optimizing for one does not automatically move the other.
- Counting outreach instead of outcomes. A reminder call that does not result in medication reconciliation or a completed visit does not lower readmission risk. The follow-up has to close the loop, not just touch the patient.
- Duplicate outreach across silos. When quality, care management, and risk teams each work the same discharge separately, the patient gets repeat calls and the team wastes capacity that should go to the next discharge.
How Pelica handles readmissions
Pelica's Care Management Copilot ingests ADT discharge events in real time, builds the transitions-of-care worklist, tracks the 5-day follow-up window so the early contact and the visit both happen on time, and routes everything through one outreach queue so teams are not calling the same patient twice. Across Pelica deployments, customers close 70%+ of TRC gaps within 30 days and reach a 75% follow-up rate on the FMC 7-day measure.
Related terms
Readmission is the outcome the transitions-of-care cluster works to prevent. ADT (Admit, Discharge, Transfer) is the real-time event that starts the follow-up clock. TCM (Transitional Care Management) is the Medicare service, with its 2-business-day contact and 7-to-14-day visit, that operationalizes the prevention.