Medical Office: The Asset Class
That Survives Recessions.

1. What medical office actually is

Medical office building (MOB) is any commercial building where the primary tenancy delivers outpatient healthcare. Doctors, dentists, imaging, infusion, ambulatory surgery, dialysis, urgent care, physical therapy. If the lease has biohazard storage and a Stark Law rep, it's medical.

What MOB isn't: hospitals (those trade as institutional healthcare, totally different buyer pool), skilled nursing, assisted living, life sciences lab. Those are healthcare real estate, but each one prices, leases, and underwrites differently. We're talking specifically about the building where you go see your doctor.

The asset class is small relative to general [office](/guides/office) — roughly $400-500B of stabilized stock in the U.S. But it punches above its weight because demand is demographic, not economic. People don't stop seeing the orthopedist when GDP contracts.

2. The hospital-anchored credit ladder

Every MOB tenant sits on a credit ladder. You need to know exactly which rung your tenant is on before you sign an LOI.

• Top rung — investment-grade health system. HCA, Tenant, Ascension, Kaiser, Sutter, Intermountain, Cleveland Clinic, Mass General Brigham. Lease is signed by the parent or a guaranteed sub. This trades like a [credit tenant lease](/cre-terms/credit-tenant-lease).
• Second rung — regional non-profit system. Strong local credit, often unrated or low-investment-grade. Solid, but not bond-equivalent.
• Third rung — large physician group / PE-backed platform. US Acute Care Solutions, USPI, large dermatology rollups. Sponsor-backed but the lease is at the OpCo level.
• Fourth rung — independent practice with 5-20 doctors. Personal guarantees from named partners. This is where most off-campus MOB lives.
• Bottom rung — solo practitioner. One doctor, one PG, one retirement risk. Underwrite the doctor's age and exit plan, not the practice.

3. On-campus vs off-campus — the pricing chasm

On-campus = the building physically sits on, or directly adjacent to, a hospital campus. Often on a long-term ground lease from the health system. Off-campus = everything else.

The pricing gap is enormous. Class A on-campus, hospital-affiliated, full-building tenancy: 5.0-5.75%. The exact same building two miles away with the same tenant roster: 6.25-7.0%. Why? Hospital adjacency drives referral volume, the health system controls who leases there, and re-tenanting risk drops to near-zero because the system will absorb space if it goes dark.

If a broker pitches you "off-campus, but hospital-affiliated" — ask what affiliated means in writing. Usually it means the tenant has admitting privileges, which is worth roughly nothing on a re-leasing analysis.

The phrase "hospital-affiliated" without a ground lease or a parent guaranty is broker poetry.

4. Tenant types — from independent docs to mega-systems

The tenant base has consolidated hard over the last decade. In 2012, ~60% of physicians owned their practice. Today it's under 30%. The rest work for hospitals, health systems, or PE-backed groups. That's relevant to you because who signs your lease determines what your building is worth at exit.

The five tenant archetypes you'll see:

• Health-system OpCo lease. Hospital owns the practice, hospital signs the lease. Top of the ladder.
• PE rollup. Dental Service Organizations (Heartland, Aspen), dermatology platforms (US Dermatology Partners), eye care (EyeCare Partners), GI (One GI). Sponsor credit, OpCo-level lease, often with a parent guaranty.
• Independent multi-physician group. 10-50 doctors, partnership structure, decent income statements. The middle of the market.
• Specialty single-tenant. Dialysis (DaVita, Fresenius), urgent care, dental, vet. Often single-asset NN or NNN. See our [NNN tenant database](/nnn-tenants) for the credit profiles.
• Solo practice. One doctor. Run the math on what happens when they retire — because they will.

5. Why MOB leases are ugly to read

A standard suburban office lease runs 40-60 pages. A medical office lease runs 80-120. The extra weight comes from healthcare-specific provisions:

• Stark Law and Anti-Kickback compliance. Rent must be at fair market value. You'll need an MAI or third-party FMV opinion at signing and on every renewal. This is non-negotiable for hospital-affiliated tenants.
• Exclusive-use clauses by specialty. The cardiologist on the third floor wants no other cardiologists in the building. The ophthalmologist wants exclusivity within a half-mile radius. Stack these clauses without thinking and you can't lease the third vacant suite to anyone.
• After-hours HVAC and access. Surgery centers run weekends. Dialysis runs at 5am. Your HVAC schedule and security card system have to support it, and the lease will dictate cost allocation.
• Medical waste, biohazard, sharps disposal. Who pays for the red-bag pickup. Where the sharps containers store. Roof-mounted incinerators (rare but real).
• Imaging shielding and weight loads. An MRI is 4 tons and needs RF shielding. A CT scanner is 2 tons. If the building wasn't built for it, the TI to add one suite can hit $400/sf.

6. What value-add MOB actually means

Value-add MOB is real, but it does not mean "buy distressed and sign a hospital." Three legitimate plays:

Lease-up of vacant suites at market rent. A Class B off-campus building with 78% occupancy and three vacant suites the prior owner couldn't lease. You bring in a regional dermatology platform, a primary care group, and a dietitian. You build the TI, you collect the rent. Two-year hold to stabilization, then refi or sale at a 6.5% cap vs. the 7.5% you bought at.

Mark-to-market on rollover. Multi-tenant MOB where leases were signed at $24/sf NNN in 2018 and market is $32/sf NNN today. As leases roll, you push rent. Doesn't sound exciting until you do the math on a 60,000 sf building.

Repositioning a tired Class C medical strip. Cosmetic refresh, new monument signage, professional property management, swap two underperforming tenants for one strong anchor. Not glamorous. Reliable.

7. The TI question

Tenant Improvement allowances on MOB run 2-5x what general office runs. A general office TI for a 5-year deal might be $25-40/sf. A medical TI for the same term is $80-150/sf, and a build-out for an ambulatory surgery center or imaging suite can run $300-500/sf.

This matters two ways. First, when you're buying, ask for the TI exposure on every lease that rolls in the next 36 months and underwrite it as a real cash outflow, not a footnote. Second, "build to suit" dominates new MOB construction precisely because no one builds spec medical — the TI risk is too high. If you see a fully-built, vacant medical suite, ask why before you assume it's a steal.

8. Healthcare M&A and your tenant base

Hospital systems are still consolidating. PE rollups in dental, derm, ophthalmology, GI, and ortho are rolling smaller practices into platforms. This is mostly tailwind for MOB owners — your independent dentist tenant becomes a Heartland Dental tenant, and credit improves overnight. But two risks:

Footprint optimization. When a system acquires another, the combined footprint gets rationalized. Suburban locations within 3 miles of each other get consolidated. Your tenant might be the one that gets closed, even if rent is current.

Re-tenanting cycle risk. PE rollups tend to renegotiate hard at lease end, sometimes demanding 20-30% rent reductions in exchange for renewal. Underwrite renewal rent at market, not at the in-place bump.

9. The 1031 fit

MOB is one of the better landing spots for a 1031 exchange. Long leases, recession-resistant cash flow, credit tenants, manageable management burden. If you're rolling out of multifamily or a development sale, MOB is on the short list with [NNN retail](/guides/retail) and [industrial](/guides/industrial).

The catch: sourcing. True on-campus, hospital-affiliated MOB almost never hits the open market. Most stabilized product trades off-market through portfolio recaps, REIT dispositions, or system-driven monetizations. If you're starting your 45-day ID period from cold, you'll mostly see Class B off-campus deals. Build relationships with the major MOB brokers (CBRE, JLL, Newmark, Colliers healthcare teams) before you sell your relinquished property. See our [1031 buyer's field guide](/guides/1031-exchange) for how to actually run an exchange without blowing the deadline.

10. The mistakes we see

• Treating "hospital-adjacent" as "hospital-anchored." Adjacency without a ground lease or system tenancy is just location. Price it as off-campus.
• Ignoring the doctor's age. If your single-tenant MOB is leased to a 64-year-old solo practitioner with five years left on the lease, you don't have a 5-year cash flow. You have a five-year question mark.
• Underwriting TI as a one-time event. TI is a recurring cost. Every rollover, every new tenant. Build a TI reserve into your model.
• Stacking exclusive-use clauses without a master plan. Three exclusives signed without coordination and you've made the next two suites unleasable. Track exclusives in a matrix from day one.
• Assuming all healthcare credit is good credit. A regional non-profit hospital with a junk-rated balance sheet is not the same tenant as HCA. Pull the bonds.
• Buying a single-tenant dental for the cap rate. Dental DSOs trade at 7-8% caps for a reason — re-tenanting an empty dental suite costs $200/sf and 9 months. The cap is compensating for risk, not generosity.

11. What to do if you're underwriting an MOB right now

Before you write the LOI:

• Build the credit map. Every tenant, every lease, every guaranty. Identify which rung of the ladder each tenant occupies. If 60%+ of the rent roll is bottom-rung, price it accordingly.
• Stress the rollover schedule. What rolls in years 1-3? What's the TI exposure if every roller renews? What if half don't?
• Verify hospital affiliation in writing. Ground lease, HOA covenant, system master lease, parent guaranty. Get the document.
• Run a market rent study. Pull comps from CBRE/JLL healthcare teams or from local healthcare brokerage. Don't trust the seller's broker on market rent.
• Get a Phase I. Medical buildings have unusual environmental risk — radioactive isotope storage, mercury amalgam from old dental, formaldehyde from path labs. Pay for the report.
• Underwrite a 12-month re-tenanting downtime on the largest tenant. If that breaks the deal, the deal was never that good.

If you want to compare MOB returns against other asset classes side-by-side, the [asset class comparison tool](/compare) breaks out cap rate ranges, lease terms, and management intensity for every major property type.

12. FAQ

What cap rate should I expect for a medical office building?

Class A on-campus MOBs anchored or owned by a major health system trade 5.0-5.75% in 2026. Class B off-campus multi-tenant medical trades 6.5-8.0%. Independent dental, vet, and single-tenant specialty MOBs often trade 7.0-9.0%. Tertiary or single-tenant deals with weak credit can stretch past 9%.

What's the difference between on-campus and off-campus medical office?

On-campus means the building sits on or directly adjacent to a hospital campus, often on a ground lease from the health system. Off-campus is everything else — strip-center medical, freestanding suburban MOBs, mixed-use first-floor clinics. On-campus trades 100-200 basis points tighter because hospital adjacency drives referrals and tenant stickiness.

Are medical office leases really that complicated?

Yes. MOB leases include Stark Law and Anti-Kickback compliance language, exclusive-use clauses by specialty, after-hours HVAC provisions, medical waste handling, biohazard storage, and TI work-letters that run 2-5x what office TIs run. Read every page. Don't sign a templated office lease for a medical tenant.

Did COVID and telehealth kill medical office?

No. The 2020-2021 telehealth scare drove a brief widening of cap rates. By 2023 in-person visit volumes were above 2019 baselines. Procedural specialties (orthopedics, GI, cardiology, ophthalmology) cannot be telehealth'd. Primary care telehealth share settled around 8-12%, not the 50% the panic forecasted.

Is medical office a good 1031 exchange target?

It's one of the better fits. Long leases (often 7-15 years), credit tenants, recession resistance, and predictable income. The catch is sourcing — true on-campus product almost never comes to market and most stabilized MOB trades off-market or through portfolio recaps. Plan your 45-day ID list accordingly.

What's value-add medical office?

Three real plays: (1) re-tenanting a vacant suite with a higher-credit specialty at market rent, (2) capturing below-market rent on rollover when leases were signed pre-2020, (3) repositioning a Class C strip-center medical center with cosmetic upgrades, signage, and a new tenant mix. Avoid "value-add" deals that depend on signing a hospital — that's a unicorn hunt, not a business plan.