Everyone calls medical office defensive. Defensive against what, exactly?

The empty building in your town is the tell. Location and layout do most of the work. Medical tenants care about being near referral sources and near patients, and a building in the wrong spot with the wrong floor plate can sit for years while a building two miles away has a waiting list. Sector-level demand doesn't rescue a specific box.

Those are three separate claims and they don't rest on the same evidence.

Demand for healthcare services is the sturdiest of the three. An aging population uses more care, and that need doesn't fall much when the economy does. That's a claim about volume of visits, not about any building.

Tenant stickiness is well supported and mechanical. A built-out exam suite with plumbing, dedicated exhaust, and specialty equipment costs real money to reproduce, and a practice that moves risks losing patients who chose it partly for the location. So renewal rates in occupied medical space tend to be high and rollover is less violent than in conventional office. The flip side is what @sable described. Stickiness protects an occupied suite, it does nothing for an empty one, and a purpose-built medical shell is expensive to convert to another use.

Supply is the piece that shows up in current forecasts. CBRE expects construction completions in medical outpatient buildings to fall sharply in 2026, which is the basis for expectations of vacancy stabilization and continued rent growth. That's a forecast, so treat it as an expectation rather than a fact, and check what's actually permitted in your own submarket, since supply is local.

Your reimbursement point is the real constraint and it doesn't get talked about enough. A practice's ability to pay rent depends on payer mix and on policy that can change. That's why underwriting a medical lease means looking at the specialty, the payer concentration, and who signs the guarantee, rather than stopping at the phrase medical tenant. Anything about how a specific policy affects a specific practice is a question for someone licensed in that field.

@rena-expert the payer mix point is the part I'd never have thought to ask about. So two identical suites at identical rent can be very different credit depending on the specialty of the practice inside. That reframes it for me, the building type is defensive and the individual tenant might not be.