What is ICRA? Infection Control Risk Assessment, explained.

Hospitals never stop operating. While wings are demolished, ceilings are opened, and floors are jackhammered, patients continue to receive care in the rooms next door. That overlap — active construction inside an environment full of immunocompromised people — is exactly what ICRA is designed to manage.

Why ICRA exists

Construction activity disturbs dust, debris, and airflow in ways that can mobilize hazardous organisms — including Aspergillus, Legionella, and other opportunistic pathogens. For a healthy person, a bit of dust is irrelevant. For a patient recovering from surgery, a transplant, or chemotherapy, the same exposure can become a serious healthcare-associated infection (HAI).

ICRA formalizes the countermeasures. Instead of treating infection control as a vague “be careful” policy, it forces the project team — owner, designer, contractor, and infection prevention — to answer concrete questions before the first wall is cut:

• Which patient populations are adjacent to the work?
• What construction activities will generate dust, noise, or pressure changes?
• What risk class does this combination produce (Class I through IV)?
• Which controls — barriers, negative air, HEPA filtration, monitoring — are required?
• Who inspects, logs, and signs off on compliance daily?

Where ICRA comes from

The modern ICRA framework is closely associated with the American Society for Health Care Engineering (ASHE), part of the American Hospital Association. Its guidance — widely used across U.S. hospitals — combines two inputs into a single matrix:

1. Lowest-risk patient population in the affected area (for example, general medical/surgical vs. protective environment vs. airborne infection isolation).
2. Type and scale of construction activity — from minor, non-invasive work to large-scale demolition and utility installation.

The intersection of those two inputs yields an ICRA risk class. Higher classes demand stricter containment, air management, and documentation. That classification step is the heart of the process — and the subject of our ICRA Class I–IV guide.

The ICRA process, step by step

While procedures vary by organization, a credible ICRA program generally follows this arc:

1. Pre-construction survey

Walk the area. Identify adjacent patient care spaces, air handler zones, and traffic routes. Capture the baseline condition so disputes don’t start later.

2. Risk classification

Assign the ICRA class using the patient-risk × construction-activity matrix. Class I is the lowest risk; Class IV is the highest and requires the most rigorous controls.

3. Control plan

Define physical barriers (rigid vs. plastic), door protocols, anterooms where required, negative pressure with HEPA exhaust, and how construction traffic will be separated from clinical traffic.

4. Execution and daily monitoring

Pressure differentials are checked and logged. Barrier integrity is inspected. Housekeeping standards for the work zone are enforced. Deviations trigger immediate corrective action — not next week’s meeting.

5. Closeout and handoff

Final cleaning, HEPA vacuuming, wet-wiping, removal of temporary controls, and a documented handoff to environmental services and infection prevention before the space returns to clinical use.

Who is responsible for ICRA?

Responsibility is shared — which is exactly why weak projects fail. The facility owner sets requirements. Infection prevention validates risk. The design team plans sequencing. The general contractor and its subcontractors execute containment. On strong projects, ICRA is a standing agenda item from preconstruction through closeout, not a binder that appears the day before survey.

Contractors who treat ICRA as core competency — not paperwork — win more work in occupied healthcare. That capability gap is the market thesis behind the icra.builders brand.

How ICRA relates to regulation and accreditation

ICRA is not a single federal statute — it is the industry’s operational answer to a stack of expectations: CMS Conditions of Participation, Joint Commission standards on infection control and environment of care, ASHE guidance, and each system’s internal policies. In practice, during surveys and audits, teams are asked to show their work: the assessment, the class, the plan, the pressure logs, the corrective actions.

If you want a practical working list for that evidence trail, see the ICRA compliance checklist. Common questions are collected in the FAQ.