The Incarceration-to-Medicare Pipeline

Every year, thousands of people age 65 and older are released from state and federal prisons. They are Medicare-eligible. Most are not immediately enrolled in Medicare upon release. Many are also Medicaid-eligible but face separate enrollment delays for that program. They leave incarceration with chronic disease prevalence rates three to five times higher than the general Medicare population for conditions including diabetes, hypertension, hepatitis C, HIV, and COPD. Approximately 20 percent of incarcerated older adults have a serious mental illness. Substance use disorder, opioid use disorder in particular, creates immediate medication access needs at reentry that administrative delays interrupt. The policy infrastructure to manage this transition has improved in the last two years, but the gap between what exists on paper and what happens at the point of release remains wide.

Medicare During and After Incarceration

#

Medicare coverage during incarceration follows rules that create predictable problems at reentry. Part A hospital insurance is not terminated during incarceration. The entitlement is preserved, but Medicare generally will not pay for services provided to someone in the custody of penal authorities. Part B is different. Beneficiaries who were enrolled in Part B before incarceration must continue paying premiums or lose coverage. A person incarcerated at age 60 who turns 65 in prison is not automatically enrolled in Medicare because Social Security benefits are suspended during incarceration, and automatic Medicare enrollment depends on active Social Security receipt. That person receives no notification from SSA reminding them to sign up. Part D enrollment terminates during incarceration, and re-enrollment requires action at release.

The penalty structure historically compounded these problems. A person who aged into Medicare eligibility during a 10-year sentence and did not enroll in Part B faced a 10 percent per year late enrollment penalty upon release, a permanent premium surcharge reflecting a system design that treated incarceration the same as voluntary failure to enroll. AARP described the situation accurately: a person in prison when they turn 65 is expected to enroll in Part B and pay premiums while incarcerated, even if they have no income, or face penalties on release.

The Post-Incarceration Special Enrollment Period, effective January 1, 2023 and modified effective January 1, 2025, was the most significant structural improvement to this system. The SEP allows a person released from custody to enroll in Medicare Part A, Part B, and Part D within 12 months of release without incurring late enrollment penalties. The SEP also offers retroactive coverage: a beneficiary can elect coverage that extends back up to six months before the month of enrollment, closing a portion of the gap between release and coverage activation.

CMS further improved the framework in November 2024 by finalizing a rule that narrowed the definition of “custody” for Medicare payment purposes. Effective January 1, 2025, Medicare’s payment exclusion applies only to people who are physically detained. Individuals on probation, parole, home confinement, or residing in halfway houses are no longer considered in custody for Medicare purposes. This change opened Medicare coverage to approximately 340,000 people under community supervision who were previously excluded.

These are real improvements. They do not solve the reentry enrollment problem.

The Enrollment Gap at Release

#

The Post-Incarceration SEP requires the released person to contact SSA, provide documentation of release, and complete the enrollment process. The SEP lasts 12 months, which provides time. But the person being released is simultaneously navigating housing, employment, parole or probation requirements, and reestablishing basic life infrastructure. Medicare enrollment is not the first priority and often not the second or third. The process requires a Social Security number, documentation that many people exiting incarceration have lost or never received copies of, and interaction with SSA either online, by phone, or in person.

There is no mechanism equivalent to Medicaid’s presumptive eligibility for Medicare. Medicaid has moved substantially further on reentry coverage. Most states now suspend rather than terminate Medicaid coverage during incarceration. The Consolidated Appropriations Act of 2024 requires all states to suspend rather than terminate Medicaid for incarcerated individuals effective January 2026. CMS issued guidance encouraging Section 1115 demonstration waivers for Medicaid pre-release services, and three states (California, Washington, and Montana) have received approvals with 17 more pending. CMS awarded four-year planning grants to 29 state Medicaid agencies in 2025 to build operational capacity for continuity of care at reentry.

Medicare has no equivalent infrastructure. There is no pre-release enrollment facilitation built into the Medicare program. There is no data-sharing mechanism between correctional systems and CMS that would trigger automatic enrollment processing. There is no counterpart to the state Medicaid planning grants focused on the Medicare enrollment pipeline. A person who is dually eligible for Medicare and Medicaid must navigate two separate enrollment processes, and if they qualify for a D-SNP or FIDE SNP, a third coordinated enrollment process on top of those. The monthly integrated care SEP theoretically helps, but only if the person has a stable address and knows the SEP exists.

The 30-day gap between release and Medicare coverage activation has no safety net equivalent for people who are Medicare-only eligible. During that period, a person with untreated diabetes, hypertension, and a substance use disorder has no mechanism to fill prescriptions, see a primary care provider, or access the medications that incarceration may have interrupted. The clinical consequences are predictable. The person presents to an emergency department. Medicare eventually pays for an avoidable acute care event that early enrollment at release would have prevented.

The Health Burden and Why It Matters for Medicare Payment

#

The health profile of recently released elderly incarcerated persons is not a marginal footnote in Medicare cost analysis. It is a concentrated expression of the chronic disease management challenge that the entire Medicare payment reform apparatus is designed to address. Chronic disease prevalence rates in this population are three to five times the general Medicare population’s for the most expensive conditions. Mental illness prevalence is approximately 20 percent for serious diagnoses. Substance use disorder prevalence creates immediate medication access needs, particularly for opioid use disorder, where interruption in medication-assisted treatment at release is associated with overdose risk.

The HIDE SNP behavioral health integration mandate is directly relevant to this population upon enrollment. The behavioral health conditions that drive utilization and cost in the recently incarcerated elderly population are exactly the conditions that HIDE SNPs are designed to coordinate. But enrollment in a HIDE SNP requires completion of the basic Medicare enrollment process first, identification of the person’s dual eligible status, navigation to an available plan, and sustained engagement with a care management system that the person may never have encountered.

The fiscal case for addressing the enrollment gap is straightforward. When a recently released, uninsured elderly person with multiple untreated chronic conditions presents to an emergency department, Medicare pays for an avoidable acute care event. The cost of that event exceeds the cost of the outpatient management that timely enrollment would have facilitated. This is not a theoretical argument. It is the same logic that underlies every CMMI model designed to shift utilization from acute to ambulatory settings, applied to a population that the models do not reach.

What States Have Built and What Policy Requires

#

State-level innovation has outpaced federal Medicare policy on reentry health coverage. California’s AB 720 established Medicaid presumptive eligibility for incarcerated individuals, and the state’s CalAIM initiative has expanded pre-release services through its Section 1115 waiver. New York has built discharge planning programs at Rikers Island and within state prison systems that coordinate Medicaid enrollment before release. Illinois has developed pre-release enrollment partnerships between correctional health providers and community health centers. These programs demonstrate that pre-release enrollment works when the infrastructure exists and the administrative systems communicate.

The Medicare equivalent would require CMS administrative action or legislation. CMS has existing authority to create special enrollment periods and to modify enrollment processing timelines. The Post-Incarceration SEP was a regulatory action, not a statutory change. A Medicare pre-release enrollment process, in which correctional health providers initiate Medicare enrollment in the 90 days before a scheduled release date, could be constructed within existing administrative authority. The processing infrastructure would need to connect correctional systems with SSA, which processes Medicare enrollment, and that connection does not currently exist.

A legislative pathway would be more comprehensive. A Medicare Reentry Coverage Act could establish pre-release enrollment facilitation as a Medicare program requirement, create a data-sharing mechanism between the Bureau of Prisons, state corrections departments, and SSA, authorize Medicare payment for transitional care management services in the 30 days following release, and waive the coverage gap that currently leaves released individuals without access during the enrollment processing period. Whether such legislation has moved in Congress is a separate question from whether the policy design is sound. The design is sound. The administrative and political barriers are real.

What correctional health providers can do in the 90 days before release is substantial, even without a federal mandate. Preparing a medication list and ensuring a 30-day supply at release. Initiating the SSA enrollment application. Coordinating with a community health center or primary care provider for a post-release appointment. Connecting with SOAR (SSI/SSDI Outreach, Access, and Recovery) program navigators for disability benefits enrollment that may create downstream Medicare eligibility. These steps require investment in discharge planning capacity that many correctional health programs do not currently have, but the cost of that investment is modest relative to the acute care costs that the current gap produces.

The incarcerated-to-Medicare population is small relative to the total Medicare enrollment. It is not small relative to the cost it generates when enrollment fails. Every person released without coverage who presents to an emergency department with decompensated chronic disease represents a system failure that existing policy tools could prevent. The Post-Incarceration SEP and the narrowed custody definition were meaningful steps. The next step is pre-release enrollment infrastructure that connects the two systems before the person walks out of the facility, not after.

Related Reading

#

MCR-09_01 Medicaid Work Requirements: The Dual Eligible Blind Spot