Commercial Lease Healthcare & Medical Office Park: MOB Leases, Stark Law Compliance, Healthcare REIT Landlords, On-Campus vs. Off-Campus & ASC Provisions 2026

The Real Math: MOB Rent Premium and Stark Law Exposure

Healthcare Real Estate Space Type Comparison

Medical Office Building (MOB) Lease Structure

What Makes an MOB Lease Different

Medical office building leases share the structural framework of standard commercial leases — base rent, NNN expense pass-throughs, TI allowances, renewal options, assignment provisions — but layer on specialized provisions that reflect healthcare's unique regulatory environment and operational requirements. The most important structural differences: Use provisions — MOB leases typically include specific permitted use language (limited to the practice of [specialty] medicine by licensed healthcare providers; no expansion to other healthcare services without landlord consent). This protects the landlord from regulatory exposure and controls the building's tenant mix, but can create constraints for growing practices that add service lines or subspecialties. Healthcare compliance representations — physician tenants are often asked to represent and warrant that they are in good standing with Medicare and Medicaid, hold all required licenses, and are not excluded from federal healthcare programs. Loss of licensure or program exclusion may be a termination event. Inspection rights — some hospital-owned MOB leases give the hospital system the right to inspect and audit the physician practice's compliance with quality standards, clinical protocols, or credentialing requirements — provisions more typical of an employment arrangement than a commercial lease. Physicians should scrutinize these provisions carefully before signing.

Tenant Improvement Allowances in MOBs

MOB TI allowances are higher than general office TI allowances — reflecting the higher cost of clinical build-out. In 2026 major markets, MOB TI typically ranges from $80–$150/sf, compared to $60–$80/sf for general office. Hospital-owned MOBs may offer higher TI ($100–$200/sf) as a competitive tool to attract physician tenants who generate referrals, but the Stark Law's FMV requirement applies equally to TI allowances: above-market TI from a hospital landlord to a physician tenant may constitute a prohibited financial benefit if it exceeds what a non-hospital landlord would offer in the same market. Healthcare tenants should obtain an independent assessment of market TI ranges before accepting a hospital landlord's TI offer — and document that the TI is within normal commercial ranges — as part of Stark Law due diligence.

NNN Expenses in Medical Office Buildings

MOB NNN expenses include the standard categories (real estate taxes, insurance, common area maintenance) plus healthcare-specific items: biohazardous waste disposal (which may be a building-level service billed as a NNN expense or a tenant-specific cost), medical gas maintenance and testing, enhanced HVAC maintenance for clinical zones, and building security systems appropriate for a medical facility. Some MOB landlords include parking in NNN expenses — healthcare patients who need accessible parking create higher parking demand and cost than standard office tenants. Review NNN expense categories carefully: healthcare-specific operating costs should be itemized so the tenant understands what it is paying for and can verify charges in the annual reconciliation.

Stark Law Compliance: The Non-Negotiable Framework

The Commercial Lease Exception

The Stark Law's commercial lease exception (42 C.F.R. §411.357(a)) provides a safe harbor for physician-landlord and physician-tenant arrangements — but only if every element of the exception is satisfied. The six required elements: (1) Written lease signed by both parties — oral or informal arrangements do not qualify; the lease must be fully executed before any referrals occur. (2) Premises specified — the lease must identify the specific premises covered (suite number, floor, square footage) with particularity. A vague description ("office space in Building X") may not satisfy the specificity requirement. (3) Term of at least one year — month-to-month or holdover arrangements are not protected; the lease must have a defined initial term of at least 12 months. (4) Compensation set in advance — the rent cannot vary based on the volume or value of referrals; it must be fixed or escalate on a predetermined schedule (annual CPI or fixed percentage increases). Percentage rent clauses tied to revenue — common in retail leases — would violate this requirement if any revenue is generated from Medicare-referred services. (5) Compensation at fair market value — rent must equal what a willing buyer would pay and a willing seller would accept in an arm's-length transaction, based on the space's commercial value independent of any referral relationship. (6) Arrangement commercially reasonable — the arrangement must make business sense even if no referrals were ever made. A hospital leasing space to a physician at a premium above FMV raises commercial reasonableness questions — why would a physician pay above market unless there were expected referral benefits?

Fair Market Value Documentation

FMV documentation is the practical core of Stark Law lease compliance. Healthcare organizations typically rely on one of three approaches to establish FMV: Third-party appraisal — an independent certified real estate appraiser (with healthcare real estate experience) provides a formal FMV opinion for the specific space, taking into account its location, condition, configuration, and the local MOB market. This is the most defensible approach but costs $3,000–$8,000 per appraisal. Broker opinion of value (BOV) — a qualified commercial real estate broker provides a written opinion of market rent for comparable space. Less expensive than a formal appraisal but less defensible in a government audit. Internal market survey — the organization surveys comparable lease transactions in the market. The least expensive but most legally vulnerable approach: government investigators will scrutinize the comparables selected and the methodology applied. For any physician-hospital lease, a formal independent appraisal is the only reliable protection. The cost of the appraisal ($3,000–$8,000) is trivially small compared to the exposure a below-FMV arrangement creates ($500,000 minimum realistic Stark Law settlement exposure).

Anti-Kickback Statute Overlay

The Stark Law is a strict liability civil statute — no intent required for a violation. But healthcare lease arrangements also need to be analyzed under the Anti-Kickback Statute (AKS), which is a criminal statute requiring knowing and willful conduct. The AKS safe harbor for space rentals (42 C.F.R. §1001.952(b)) has similar requirements to the Stark Law commercial lease exception: written agreement for at least one year, FMV compensation not based on volume or value of referrals, commercially reasonable arrangement. The difference: AKS violations can result in criminal prosecution (up to 10 years imprisonment, $100,000 fines per violation) in addition to civil penalties and program exclusion. Healthcare tenants and their landlords should ensure their lease structures satisfy both the Stark Law commercial lease exception and the AKS space rental safe harbor simultaneously — requirements are similar but not identical in every detail. Specialized healthcare counsel is essential for any arrangement involving Medicare-referring physicians and healthcare entity landlords or tenants.

On-Campus vs. Off-Campus Medical Office Leases

On-Campus Lease Dynamics

On-campus MOB space — located within a hospital's defined campus, connected by common corridor or within close physical proximity to the main hospital building — is the most operationally integrated healthcare office setting. The lease relationship is typically with a hospital system subsidiary or affiliated REIT. On-campus leases come with significant benefits: direct patient flow from hospital departments, co-location with ancillary services (imaging, lab, pharmacy), emergency response integration, and the prestige and referral dynamics of a hospital campus address. The tradeoffs: higher rent (hospital-owned on-campus space frequently commands the top of the MOB market); less lease flexibility (hospital form leases are highly standardized with limited negotiation); and ancillary obligations that blur the line between a lease and an employment or service relationship — quality compliance, clinical protocol adherence, call coverage requirements, hospital committee membership. Physicians should review on-campus leases with healthcare counsel who can identify provisions that may compromise practice independence or create undisclosed compensation arrangements.

Off-Campus MOB Lease Advantages

Off-campus medical office parks — freestanding MOBs or professional buildings housing medical tenants — offer physicians the advantages of a clinical-grade facility without the governance and compliance constraints of a hospital campus lease. Off-campus MOB rent typically runs $3–$8/sf lower than comparable on-campus hospital-owned space, reflecting the absence of campus premium and lower landlord leverage. Lease terms tend to be more negotiable: landlords who are not hospital systems have less institutional power and more incentive to compete on terms. The operational tradeoff: off-campus practices must manage their own ancillary referral relationships (directing patients to the appropriate imaging center, lab, or specialist), whereas on-campus tenants benefit from the integrated hospital referral network. For practices with an established patient base and diversified referral relationships, off-campus MOB space often offers better economics with comparable clinical infrastructure.

Certificate of Need Provisions

CON as a Lease Condition

In the 35+ states that maintain Certificate of Need laws, certain healthcare facility expansions — including new ambulatory surgery centers, imaging centers above defined capital expenditure thresholds, psychiatric facilities, and some specialty clinic types — require CON approval before the facility can begin operations. A healthcare tenant who signs a lease before obtaining CON approval takes two risks: (1) losing the lease deposits and committed TI costs if CON is denied; and (2) being bound to a lease for a facility that cannot legally operate. Standard practice for healthcare tenants in CON states: negotiate a CON contingency provision that makes the lease conditional on obtaining CON approval within a defined period (typically 12–24 months, depending on state process timelines), with full return of deposits and termination without penalty if CON is denied or not obtained within the contingency period. Landlords in CON states understand and accept this contingency — it is a standard part of healthcare real estate practice.

CON Scope Limitations on Lease Use

Once CON is obtained and operations commence, the CON approval defines the scope of approved services — the types and volumes of procedures or services that can be provided at the facility. Expanding services beyond the CON-approved scope may require a new or amended CON application. The lease's use provision should reflect this reality: the permitted use should be defined consistently with the CON approval, and the lease should address what happens if the tenant seeks to expand its CON approval (does the landlord consent to expanded use automatically? does the tenant need to notify the landlord? are there space reconfiguration implications?). Tenants should also understand the implications of CON on lease assignment: assigning a healthcare lease to a new operator may require new CON approval for the assignee's proposed use, potentially making standard assignment provisions unworkable in a CON state without a healthcare regulatory review step.

Healthcare REIT Landlord Dynamics

Negotiating With a Healthcare REIT

Healthcare REITs — including Healthpeak Properties (formerly HCP), Physicians Realty Trust (now merged into Healthpeak), Ventas, and Welltower — own hundreds or thousands of MOBs across the country and operate with institutional-grade asset management discipline. Leasing from a healthcare REIT is fundamentally different from leasing from a local medical professional building owner. REITs operate with standardized lease forms vetted by their legal teams, negotiating protocols that are consistent across their portfolios, and metrics (occupancy, weighted average lease term, NOI growth) that drive their negotiating positions. The practical implication: a physician group negotiating with a healthcare REIT faces a highly sophisticated counterparty with vast data on market rents, tenant credit, and lease terms across comparable transactions — while the physician practice likely negotiates a commercial lease once every 5–10 years. Engaging a specialized healthcare real estate tenant representative — a broker with specific MOB transaction experience — is not optional when leasing from a major healthcare REIT.

REIT Lease Compliance Provisions

Healthcare REIT leases routinely include provisions reflecting the REIT's awareness of healthcare regulatory risk: Regulatory compliance representations — the tenant represents and warrants that it is in compliance with all healthcare laws (Stark, AKS, HIPAA, state licensing) and will remain so throughout the lease term. Audit right — the REIT may reserve the right to audit the tenant's Medicare and Medicaid billing records to confirm that the lease arrangement does not constitute a Stark Law or AKS violation. Termination on regulatory adverse event — if the tenant is excluded from Medicare or Medicaid, loses licensure, or is convicted of a healthcare fraud offense, the REIT may have the right to terminate the lease. Healthcare law indemnification — the tenant may be required to indemnify the REIT against any losses arising from the tenant's failure to comply with healthcare regulations. Review all healthcare regulatory provisions in a REIT lease with a healthcare attorney — these provisions can significantly affect the practice's operational flexibility and risk exposure.

Ambulatory Surgery Center Lease Considerations

ASC Infrastructure Requirements and Lease Obligations

Ambulatory surgery centers are among the most infrastructure-intensive healthcare tenants in commercial real estate. The physical requirements of an ASC — operating rooms, pre/post-operative care areas, sterile processing, anesthesia storage, and emergency response capabilities — demand landlord commitments and lease provisions that go substantially beyond standard MOB leasing. Critical ASC lease provisions: Floor load and structural capacity — confirm the building can support 125–150 lbs/sf live load in the OR and procedure areas; surgical equipment (C-arms, operating tables, robotic surgical systems) is extremely heavy. Backup power requirement — CMS requires Medicare-certified ASCs to have emergency power for life safety systems, OR lighting, and critical equipment. The lease must confirm the building provides (or the tenant may install) a generator with automatic transfer switch, sufficient capacity for the ASC's critical systems, and fuel supply for defined durations (typically 96 hours minimum). Air handling requirements — OR ventilation must provide 15–20 air changes per hour with filtered air supply; the building's HVAC must support this or the tenant must be permitted to install supplemental air handling equipment. Exclusivity — no competing surgical facility in the building during the lease term. Term and renewal — ASC build-out costs ($500K–$2M+) justify long initial terms (10–20 years) and multiple renewal options to protect the investment amortization.

6 Red Flags in Healthcare and MOB Leases

Frequently Asked Questions