Regional medical groups with 5-30 clinic locations face inconsistent CAM billing across different MOBs and landlords. A standardized audit recovers more.
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Start partner setupRegional medical groups operating 5 to 30 clinic locations across different medical office buildings face a CAM problem that single-location practices never encounter: inconsistency. Each MOB has a different landlord, a different lease structure, and a different definition of what counts as common area. One building charges $9/SF for CAM. Another charges $17/SF for a similarly sized space in the same metro area. Without a standardized audit process, those discrepancies go unquestioned year after year, and the overcharges accumulate.
This guide breaks down why multi-site medical groups are particularly vulnerable, how to build a comparison framework across your clinic network, which billing errors repeat most often, and how to make CAM auditing a permanent part of your financial operations.
Multi-site medical group CAM audit: A coordinated review of CAM reconciliation statements across all clinic locations in a medical group's portfolio, using normalized per-square-foot benchmarks and consistent rule checks to identify overcharges that would be invisible when each site is reviewed in isolation.
A solo physician practice leasing one suite has one lease and one landlord relationship. A regional medical group with 15 locations has 15 leases, often negotiated by different people at different times under different market conditions. That fragmentation is the root of the problem.
Most medical groups grow by acquisition, expansion into new markets, or gradual addition of satellite clinics over a period of years. The group's first lease was probably negotiated by a founding physician. Location number seven was handled by an office manager. Location number twelve came through a practice acquisition where the existing lease transferred as-is.
The result: no two leases use identical CAM language. Some include management fee caps. Others do not. Some define common area narrowly. Others use broad language that gives the landlord wide latitude. When nobody at the group level has ever compared these leases side by side, each location operates as if its CAM charges are normal, because nobody has a baseline for comparison.
According to MGMA, most medical groups under 30 providers handle facilities decisions through a combination of the CFO, office managers, and occasionally outside counsel brought in for lease renewals. There is rarely a dedicated real estate or lease administration role. That means reconciliation statements arrive at individual clinics, get reviewed (or not reviewed) by local staff, and get paid without anyone at the group level seeing the full picture.
Practice overhead already consumes a significant share of revenue at most medical groups. MGMA cost survey data consistently shows that occupancy costs, including rent, CAM, and NNN charges, represent one of the top five expense categories for multispecialty groups. When those costs contain billing errors that persist across multiple locations, the aggregate impact on practice overhead is material.
Medical office buildings are not uniform. A 1990s-era MOB with a central chiller plant handles HVAC costs differently from a 2015 build with rooftop package units assigned to each tenant. Older buildings tend to pool HVAC costs into the shared CAM expense, which means every tenant subsidizes the system regardless of their actual load. Newer buildings sometimes meter HVAC by suite but still include shared ductwork and controls maintenance in the CAM pool.
For a medical group with clinics spread across buildings of different ages and configurations, this creates a situation where the HVAC component of CAM varies wildly from location to location, often for reasons that have nothing to do with the clinic's actual usage.
The single most valuable step a multi-site medical group can take is normalizing CAM charges to a per-square-foot basis across every location. Until you do this, you are comparing dollar amounts that mean nothing without context.
For each clinic location, pull together:
Most medical groups already have these documents scattered across offices, shared drives, and filing cabinets. The challenge is not that the data does not exist. It is that nobody has ever consolidated it.
Divide total annual CAM charges by rentable square footage for each location. This gives you a $/SF figure that you can compare across the portfolio.
| Clinic | MOB | CAM paid | Suite SF | CAM/SF | Landlord |
|---|---|---|---|---|---|
| Westside Primary Care | Park Medical Plaza | $28,400 | 2,200 | $12.91 | Meridian Health Properties |
| Eastside Pediatrics | Valley MOB | $19,600 | 1,800 | $10.89 | Valley Medical Realty |
| Downtown Urgent Care | Metro Medical Tower | $41,200 | 2,400 | $17.17 | National Healthcare REIT |
| Northgate OB/GYN | Northgate Medical Center | $22,100 | 1,600 | $13.81 | Northgate Partners LLC |
| Southpark Internal Medicine | Southpark MOB | $34,800 | 2,600 | $13.38 | Meridian Health Properties |
Even a table this simple reveals something immediately: the Downtown Urgent Care location is paying $17.17/SF while the Eastside Pediatrics clinic pays $10.89/SF. That $6.28/SF gap may reflect genuine differences in building quality, services, and market rates. Or it may reflect billing errors that have compounded over years without scrutiny.
Any location where CAM/SF exceeds the group's median by more than 25% deserves a closer look. So does any location where CAM/SF increased by more than 8% year over year without a clear operational reason (major building renovation, new common area amenities, or documented insurance cost spikes).
BOMA's Experience Exchange Report provides metro-level operating expense benchmarks for medical office buildings. Cross-referencing your per-square-foot figures against published BOMA ranges for your metro area adds an external check that makes your analysis stronger.
"Most medical groups discover their CAM problem the same way: someone finally puts all the numbers in one spreadsheet, and the per-square-foot gaps jump off the page. The data was always there. Nobody had ever lined it up." — Angel Campa, Founder of CAMAudit
After building CamAudit and running reconciliation data through the detection engine, three patterns show up with disproportionate frequency in multi-site medical group portfolios. These are not rare edge cases. They are structural billing problems that persist because nobody at the group level is checking for them.
This is the most common high-dollar error in MOB portfolios. When a building's shared HVAC system needs a compressor replacement, a full rooftop unit swap, or a chiller overhaul, the landlord faces a classification decision: is this a maintenance expense (passable through CAM to all tenants) or a capital expenditure (which most leases require the landlord to amortize over the asset's useful life or exclude entirely)?
The financial difference is significant. A $180,000 chiller replacement charged as a maintenance expense in a single year hits the CAM pool at full cost. Amortized over a 15-year useful life, the annual pass-through drops to $12,000. For a medical group holding a 5% pro-rata share, that is the difference between a $9,000 charge and an $600 charge in year one.
This error is especially prevalent in older MOBs where major building systems are reaching end of life. If your medical group has clinics in buildings built before 2005, check every HVAC-related line item above $10,000 against your lease's capital expenditure exclusion language.
For more on this pattern, see our guide on capital expenditures in CAM charges.
Pro-rata share errors in MOBs often trace back to a mismatch between how the lease defines the tenant's share and how the landlord actually calculates it. Medical office leases sometimes reference usable square footage (the space inside your suite walls) while the landlord bills based on rentable square footage (which includes a load factor for common areas like lobbies, corridors, and shared restrooms).
The load factor in a typical MOB ranges from 12% to 18%. That means a clinic with 2,000 usable square feet might have a rentable area of 2,300 SF. If the landlord calculates your pro-rata share using the higher rentable figure when your lease specifies usable, you are overpaying by roughly 15% on every CAM dollar.
Multiply that across a 12-location medical group, and the aggregate error becomes substantial. CamAudit's pro-rata share detection rule flags this automatically by comparing the share percentage stated on the reconciliation against the lease-defined calculation method.
MOB landlords periodically invest in building upgrades: elevator modernization, lobby renovations, new wayfinding signage, parking lot resurfacing. These projects improve the building's competitive position and often help the landlord attract or retain tenants at higher rents. Under most well-drafted leases, these costs are capital expenditures that the landlord bears, not operating expenses that tenants share.
The billing error occurs when the landlord reclassifies these projects as "common area maintenance" or "building improvements" and passes the full cost through the CAM pool. A $95,000 elevator modernization charged to a 40-tenant MOB adds roughly $2,375 per tenant in a single year. Multiplied across several of your clinic locations in buildings undergoing similar upgrades, the aggregate overcharge adds up.
Check your reconciliation for any single line item that represents a one-time project cost rather than a recurring maintenance expense. If the cost extends the useful life of a building system or adds new capability, it is almost certainly a capital expenditure under standard lease interpretation.
Consider a regional urgent care network operating 12 clinics across a mid-Atlantic metro area. The clinics are spread across nine different MOBs owned by six different landlords. Suite sizes range from 1,400 SF to 3,200 SF. Total portfolio square footage: 26,800 SF.
The group's CFO consolidates all 12 reconciliation statements for the first time and normalizes them to per-square-foot costs.
| Finding | Locations affected | Avg. annual overcharge per location | Annual portfolio total |
|---|---|---|---|
| HVAC capital charged as maintenance | 4 of 12 | $3,200 | $12,800 |
| Pro-rata share denominator mismatch | 3 of 12 | $3,490 | $6,300 |
| Management fee exceeding lease cap | 5 of 12 | $1,450 | $7,250 |
| Elevator modernization in CAM pool | 2 of 12 | $2,800 | $5,600 |
Total annual overcharge exposure: $31,950
With a standard three-year lookback period (varies by state and lease), the potential recovery grows to $95,850.
Three observations from this example:
No single location had a dramatic overcharge. The largest individual error was $4,100 at one clinic. In isolation, that might not trigger a dispute. But when the same pattern appears at four locations, the aggregate recovery justifies the effort.
Two landlords accounted for 70% of the errors. The group had three clinics under one landlord and two under another. Both landlords used the same property management firm. The management fee cap violation and HVAC misclassification appeared at every location managed by that firm, suggesting a systematic billing practice rather than an isolated mistake.
The pro-rata errors were the easiest to prove. The lease language was unambiguous at all three affected locations. The landlord was using rentable area to calculate the share; the leases specified usable area. That type of finding requires no judgment call and no negotiation about intent. The numbers either match the lease or they do not.
The group filed dispute letter drafts at seven of the twelve locations and recovered $68,400 in credits applied to future rent obligations.
The biggest obstacle for multi-site medical groups is not the complexity of any individual audit. It is the absence of a repeatable process. Most groups discover overcharges reactively, often because a new CFO or practice administrator looks at the numbers for the first time and notices something off. That reactive approach guarantees that some years get reviewed and others do not.
CAM review needs a single owner at the group level. For most medical groups in the 5 to 30 location range, that owner is either the CFO or an operations director. The role does not require real estate expertise. It requires the discipline to collect reconciliation statements from every location on a consistent timeline and run them through a standard review process.
Most landlords deliver CAM reconciliation statements between January and April. Dispute windows typically run 30 to 90 days from delivery. That makes Q1 the natural window for annual CAM review.
A practical calendar:
This four-month cycle adds minimal operational burden because the reconciliation statements are arriving anyway. The only change is routing them through a centralized review before payment.
Once you have two or more years of normalized data, patterns emerge that a single-year snapshot cannot reveal. A landlord who increases the management fee by 0.5% each year above the lease cap generates a small overage in year one, a larger one in year two, and a compounding problem by year five. Annual tracking catches this trajectory before the cumulative overpayment becomes large.
IREM's income/expense analysis reports provide year-over-year operating cost trend data for medical office properties by metro area. Comparing your portfolio's CAM trajectory against published IREM benchmarks helps distinguish genuine cost increases from billing drift.
Running each location through a free CamAudit scan before investing staff time in manual lease comparison gives the group a fast first-pass filter. Locations with no flagged findings can be monitored annually with minimal effort. Locations with flagged findings get escalated to lease-level review and, where warranted, a formal dispute.
For groups operating at the larger end of the 5 to 30 location range, the enterprise multi-location CAM audit guide covers the governance and escalation frameworks that become necessary as portfolio size grows.
How many clinic locations justify a standardized CAM audit process?
Even five locations benefit from a normalized comparison. At that scale, you can identify per-square-foot outliers, spot landlord-specific patterns, and catch errors that would be invisible when each clinic reviews its own statement independently.
What is the typical CAM recovery for a multi-site medical group?
Recovery depends on the number of locations, lease terms, and how long the errors have persisted. Groups with 10 to 15 clinics commonly find aggregate annual overcharges in the $20,000 to $50,000 range, with multi-year lookback recoveries reaching two to three times that amount.
Should we audit every location or just the ones with high CAM costs?
Start by normalizing CAM per square foot across all locations. Locations with the highest per-square-foot costs or the largest year-over-year increases should be prioritized. But low-cost locations under landlords who also manage your higher-cost sites are worth reviewing too, because billing patterns tend to repeat across a property manager portfolio.
Who at the medical group should own the CAM audit process?
The CFO or operations director is the natural owner for groups under 30 locations. The role requires financial discipline and access to lease documents, not commercial real estate expertise. CamAudit automates the detection work, so the owner focuses on collecting statements, reviewing flagged findings, and filing disputes.
Can we dispute CAM charges from prior years if we never audited them?
Most leases include a lookback window, typically two to five years, during which you can dispute charges from prior reconciliation periods. The lookback period is defined in your lease audit rights clause. State law may also impose limitations. Check both your lease language and your state statute before assuming prior-year recovery is available.
This article is for informational purposes only and does not constitute legal advice. CAM audit rights and dispute procedures are governed by the specific terms of your lease and applicable state law. Consult a qualified attorney before filing a formal CAM dispute.
