Dental procurement is the part of the business that the dental support organization (DSO) model tends to leave stranded. The model draws a clear line: centralize the business side, keep care local. Billing, credentialing, marketing, and human resources move up to the shared-services organization, while clinical decisions stay with the doctors and their teams. Supply ordering falls in the gap between those two halves. It tends to land on practice managers who were hired to run a schedule and a front desk, not to negotiate with vendors or reconcile invoices.

That gap has a cost. Multi-location dental support organizations run overhead in the 50% to 55% range of collections, well below the 60% to 65% average that Overjet's overhead benchmark reports for the profession, and that spread is the DSO's core economic argument. But the gap is shrinking. The 2025 Dental Economics/Levin Group Annual Practice Survey found that overhead rose 5.1% in 2024, a pace the survey describes as a possible new normal. Lower overhead only holds if the back office actually operates like one.

The model keeps expanding. In 2024, more than 1 in 4 dentists within 10 years of graduation were affiliated with a DSO, per ADA Health Policy Institute data. As affiliated practices multiply, the question is no longer whether to centralize the business side. It is whether purchasing gets centralized with everything else or gets left behind.

Key takeaways:

• Supply ordering fragments with each acquisition because integration prioritizes clinical systems and billing, leaving purchasing to accumulate by default.
• The spend a DSO can standardize is operating supplies, not clinical supplies, and drawing that line deliberately is what keeps a standardization program credible.
• A single approved catalog is the precondition for every other purchasing control, from vendor consolidation to approval workflows to location-level reporting.
• Consolidating vendor relationships converts scattered site-level volume into group-wide negotiating leverage without requiring every local supplier to be replaced.
• Spend visibility only matters if it reaches leadership before the invoice arrives, which requires coding at the point of purchase rather than at reconciliation.
• Standardized purchasing shapes the patient experience because the front office, waiting room, and signage a patient sees are products of the buying process behind them.

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How the affiliation model leaves purchasing behind

DSO integration follows a predictable sequence. Clinical systems and billing migrate first because they touch revenue. Credentialing and HR move next because they touch compliance. Purchasing is last in line, and "last" often means "never." The practice keeps its existing supplier accounts, its rep relationships, and whatever pricing was negotiated when the office opened, sometimes years before affiliation.

That creates a structural problem specific to the DSO model. A hotel management company onboards properties it already owns. A DSO affiliates practices that retain clinical autonomy, and with it, the habit of ordering through reps who visit the office, walk the supply closet, and place the order on the spot. The rep relationship is efficient for a solo practitioner. It is how a 40-location group ends up paying different prices for the same gloves at every site.

The effects land on the finance team. Each inherited practice brings its own vendor accounts, its own invoice formats, and its own approval exceptions. A practice manager juggling patient check-ins, schedule changes, and phone calls is not going to stop and comparison-shop a $45 order for copy paper. Multiply that across dozens of offices and the group accumulates vendor sprawl that no one chose on purpose. The same vendor sprawl turns up throughout multi-site healthcare procurement, and the affiliation model makes it harder to unwind, because the practice was never rebuilt from scratch.

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Where the money sits: operating spend vs. clinical spend

Operating supplies are easy to overlook one order at a time. They are high-SKU, high-frequency, and low-dollar-per-order: too small to justify reviewing any single purchase, yet large enough in aggregate across a growing group to move the numbers. No one flags a $60 order for breakroom supplies. Fifty-five offices placing that order every week is a different conversation.

Overjet's overhead breakdown puts the scale in context. Facility and equipment costs run roughly 6% to 10% of collections, while clinical supplies and lab fees account for a further 6% to 8%. Front-office supplies, reception furniture, signage, cleaning products, breakroom items, and IT peripherals all sit inside that facility-and-equipment band. These are the categories a purchasing program can standardize. They map closely to a standard medical office supplies list, which means a dental group can build its first catalog from an existing template rather than from scratch. Clinical consumables and specialty dental equipment sit on the other side of the line, sourced through the clinical organization and its own suppliers.

Drawing the clinical line: what a DSO catalog should and should not contain

A DSO catalog should contain only operating supplies, not clinical consumables. Doctors retained clinical autonomy at affiliation, and overriding that agreement is a different fight. Here is how the operating categories break down by governance level.

Once a group publishes this table, the catalog question is settled: every item in the left column has an approved SKU, a negotiated price, and a vendor. A "reception chair" in Phoenix is the same reception chair in Denver. Without that specificity, consolidation, approvals, and reporting all run on inconsistent data.

Replacing the rep model with group-level agreements

In a solo practice, the supply rep is the purchasing department. The rep visits, reviews what is running low, and places the order. That model works when one doctor controls the budget. It breaks when 55 offices each maintain separate rep relationships for the same categories, because the group negotiates as 55 small buyers instead of one. The mechanics of aggregated buying are the same logic behind a group purchasing organization, but a DSO can apply them directly.

Consolidation does not mean firing every rep. Some local vendors serve a location well, and a good program keeps what works. The goal is to retire the redundant relationships: three different glove suppliers across a region, four vendors selling the same brand of disinfectant at four different prices. Route that volume through negotiated group agreements and the administrative load drops with it, fewer invoices, fewer logins, and fewer people holding purchasing authority across the organization.

Approval thresholds built for practice managers, not procurement staff

Approval thresholds should auto-clear routine catalog reorders and route only the exceptions. Practice managers run the schedule, handle patient check-in, answer phones, and manage the front desk. Purchasing is one task among a dozen, and it rarely gets more than a few minutes of attention between appointments. A workflow that treats every order like a procurement decision will get ignored or worked around.

Recurring items can skip the ordering step entirely. Frequently purchased supplies, such as copy paper, cleaning products, and front-desk consumables, reorder from the approved catalog on a set schedule so they arrive without anyone placing the order by hand.

Comparing locations before the invoice arrives

A DSO regional operations director might oversee eight to twelve practices. The hardest question to answer is also the most important: which location is spending outside the norm? It stays unanswerable when every office submits invoices in different formats on different timelines. A single roll-up number hides the variance: one efficient office masks another that is overspending, and the pattern is months old before anyone notices.

The fix is structural. When GL codes attach at the point of purchase rather than at reconciliation, spend data is usable during the quarter instead of only at close. A regional director can pull operating-supply spend per patient visit across all twelve practices in March and spot the outlier before it becomes a year-end surprise. That comparison only works if every location is buying from the same catalog at the same negotiated prices, which is why the catalog and the vendor agreements have to come first.

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Consistency is part of the patient experience

Patients judge the practice in front of them, and standardized supply ordering is part of what they see. A family split across two offices in the same group will notice if one waiting room feels considered and the other feels improvised. Matching reception environments, signage, and front-desk standards tell patients the practice is part of a managed, consistent group.

When those choices are made locally, item by item, the result is variance no one designed. Two offices end up with different reception chairs, different signage, and a different feel not because anyone chose differently on purpose, but because the buying process never coordinated the decision. A standardized catalog turns brand consistency into a default rather than a coincidence.

What to look for in a purchasing approach

The right purchasing approach for a DSO has to fit how the group actually operates. Whether the team builds the capability internally or evaluates dental procurement software, a handful of requirements separate an approach that scales from one that stalls after a few locations.

• Multi-entity support. The approach has to handle multiple locations and legal entities under one roof, with reporting that rolls up and drills down.
• Adoption by non-procurement staff. Practice managers, not buyers, place most of the orders. If the workflow is not obvious to them, it will not get used.
• Approval flexibility. Thresholds by role, location, category, and dollar amount, so routine spend clears and exceptions route to a person.
• Location-level reporting before the invoice. Spend visibility by site while there is still time to act, not a report that arrives after close.
• Vendor and invoice consolidation. Fewer supplier relationships and a simpler payables process as the group grows.
• Fast onboarding for newly affiliated practices. Each acquisition should join the standardized program quickly, before it adds its own layer of vendor sprawl.

What effective standardization looks like at scale

EPIC4 shows what standardization looks like once a group commits to it. The doctor-owned specialty partnership organization runs 55 orthodontic and pediatric locations. Before it centralized, each office ordered independently. The group managed more than 70 suppliers collectively, no approved product list governed what anyone bought, and pricing varied from site to site. The finance team absorbed the result: hundreds of purchase orders, invoices, exceptions, and returns every cycle, arriving in different formats.

After moving purchasing onto a single platform with Order.co, EPIC4 standardized ordering across all 55 locations. The group loaded 26,000 pre-approved products, brought its 70-plus vendors onto one system, and cut procurement time by 50%. The payables burden dropped alongside it. As Sam Jenio, EPIC4's Director of Procurement and Business Development, put it: "We don't have to have four or five accounts payable people chasing invoices and managing that process manually."

The proof point is not any single number. It is that a growing group replaced a fragmented buying process with one system of record, and the finance and office teams got their time back.

How Order.co supports procurement for dental support organizations

Every control in this article, the catalog, the vendor agreements, the approval thresholds, and the location-level reporting, depends on one thing: a single purchasing system that the whole group actually uses. Order.co gives DSO finance and operations teams that system, applied to the operating supplies that keep front offices and facilities running.

• Unified catalog. One approved product list with negotiated pricing across every location, so practice managers order from the catalog rather than through whichever rep visits that week.
• Spend limits and approval workflows. Per-buyer, per-location, and per-category ceilings that auto-clear routine reorders and route only exceptions for review.
• AI sourcing. Order.co's sourcing AI scans the vendor network to find better pricing on the products practices already buy, averaging 5% savings without a manual comparison at each site.
• Automatic reordering. Frequently purchased items reorder from the catalog on a set schedule, so copy paper, cleaning products, and front-desk consumables arrive without anyone placing the order by hand.
• GL coding at the point of purchase. Every order is coded to the correct account and location the moment it is placed, not reconstructed weeks later during reconciliation.
• Consolidated billing. Order.co pays the vendors and bills the group back on one pre-coded invoice per location, removing three-way matching from the payables process.
• Accounting system sync. Native connections to NetSuite, Sage Intacct, and Quickbooks push GL-coded spend data into the financial system automatically, eliminating duplicate entry between purchasing and accounting.

Together, these capabilities close the gap the affiliation model leaves open. A newly affiliated practice orders from the unified catalog instead of its inherited rep relationships, routine reorders clear without a signature, and finance sees GL-coded spend by location before the invoice arrives. Schedule a demo to see how Order.co brings newly affiliated practices onto one purchasing system.

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