The DSO Model
What DSO affiliated actually means.
The term covers a wide range of arrangements and is usually used as though it describes only one. This page sets out what the published record measures, how common affiliation is, who it happens to, and what the label does not tell you. Each figure is attributed to the source that published it, and the limits of that record are stated here rather than left out.
Definition
The term describes a management arrangement.
DSO stands for dental support organization. In the national data, the label is applied by a definition rather than by a business model. The ADA Health Policy Institute counts a practice as DSO affiliated "if some outside entity manages some or all of its non-clinical functions such as billing, marketing, human resources, etc." The definition is written at the level of a practice, which is what qualifies for the label. The share HPI then publishes is reported at the level of dentists, which is what gets counted.
That sentence decides how every number on this page should be read. The test is who manages the non-clinical work. It is not who owns the practice, and it is not how much equity a doctor holds. A practice can be counted as affiliated without a dollar of ownership changing hands.
What the label does and does not measure
It measures management
Whether an outside entity runs part of the administrative side of the practice. That is the whole test.
It does not measure ownership
Equity may have transferred in full, in part, or not at all. The definition is silent on it.
It does not measure clinical control
Who directs treatment planning and standards of care is a separate question, answered in an agreement rather than by a category.
It counts dentists, not practices
Every ADA Health Policy Institute figure on this page is measured at the level of individual dentists. Converting one into a share of practices is a category error.
The measured level
How common affiliation is, and which way it has moved.
Two numbers describe the national picture. One is the level in a single year. The other is the direction over a decade. Both come from the same institute, and both come with limits the institute states itself.
16.07%
Because the measure turns on who manages the non-clinical work, a practice can be counted here without having sold any equity. In the same file, HPI states it "chose to present estimates we feel are slightly below the true level of DSO affiliation," which makes 16.07 percent a conservative floor. The measure counts dentists, not practices.
ADA Health Policy Institute, Distribution of Dentists, 2024 practice modalities data.
Only the two endpoints are shown, each with its year. The published series has no 2018 point and changes data source after 2021, so it is not a continuous annual line and the years in between are not plotted here. The August 2025 workforce report renders the 2024 value to one decimal; HPI's underlying distribution file for 2024 records 16.07 percent.
ADA Health Policy Institute, The U.S. Dentist Workforce, August 2025, slide 31.
Reading the label
Where the count stops.
What the count includes
Inside the definition
- Any practice where an outside entity runs part of the administrative side. Partial counts the same as complete.
- Both ends of that range at once, from a narrow billing arrangement to a full transfer of the business, recorded identically.
- A share expressed as a percentage of dentists, because that is the unit the institute publishes.
What the count is silent on
Outside the definition
- Whether any equity changed hands. A practice can be counted with no ownership change at all.
- Who holds clinical authority.
- Whether the practice keeps its name, its team, or its local identity.
- How the arrangement ends, or who the next owner is.
- How many U.S. practices this represents. The figure counts dentists, and no verified count of U.S. practices exists to convert it into.
Two practices can carry the same label and be built on completely different terms. The label is where the questions start, not where they end.
Who it happens to
Career stage explains more than any national average.
Affiliation is not spread evenly across the profession. It concentrates at the start of a career and thins out with time in practice. That pattern is the most useful thing in the published data, and it is the part most often dropped from the summary.
26.5%
26.5 percent of dentists up to 10 years out of dental school were DSO affiliated in 2024, against 14.4 percent at 11 to 25 years out and 9.1 percent beyond 25 years. This is a snapshot of one year, not one group of dentists followed through a career.
ADA Health Policy Institute, The U.S. Dentist Workforce, August 2025, slide 32.
31%
In four states, Nevada, Arizona, Colorado, and Oklahoma, the share of dentists less than five years out reaches about half. Cohort definitions matter here: figures published elsewhere for "new dentists" often use a different window and are not comparable to this one.
ADA Health Policy Institute, The U.S. Dentist Workforce, August 2025, slide 34.
Local variation and intent
No national average describes a local market.
In 2024, DSO affiliation ranged from 2.3 percent of dentists in Hawaii to 26.9 percent in Colorado, with seven states sitting near 25 percent. A doctor in one of those states is looking at a different market from a doctor two states away, whatever the national figure says (ADA Health Policy Institute, state data for 2024, and The U.S. Dentist Workforce, August 2025, slide 33).
What the next cohort intends is also on the record. Among 2025 dental school seniors planning to enter private practice immediately, 32 percent intended to join a DSO and 50 percent intended to join a non-DSO practice (ADEA, Dentists of Tomorrow 2025, Issue 10, January 2026). Of 2025 seniors planning to join a private practice, 77 percent expected to begin as associates (ADEA, Dentists of Tomorrow 2025, page 8). Both figures are measured on graduating seniors rather than on practising dentists, so they do not share a denominator with any ADA figure above.
The ownership record
Ownership starts later than it used to.
Early-career ownership has fallen sharply from one graduating cohort to the next. Further along a career, the difference between cohorts narrows. Both halves belong in the same picture, and so does the point at which the record runs out.
21%
21 percent of the 2016-2020 cohort were practice owners at five to nine years out, against 33 percent of the 2011-2015 cohort and 63 to 70 percent of the cohorts graduating between 1996 and 2010. Later in a career the difference narrows: at 15 to 19 years out, 81 percent of the 2006-2010 class were owners, against 89 percent of the 1991-1995 class. Two limits belong with these numbers. The table does not hold one measurement window across every cohort, reporting three-to-seven and four-to-eight year buckets alongside five-to-nine. And no cohort graduating after 2010 has reached mid-career yet, so for the newest cohorts the later catch-up is an expectation rather than a measurement.
ADA Health Policy Institute, Practice Ownership Trends in Dentistry, June 2025, Table 1.
72.5%
The denominator is dentists in private practice, not all U.S. dentists, and owner means sole owner, partner, or shareholder. These are snapshots of different dentists in different years rather than one group followed over time, and the decline is concentrated among dentists under 45.
ADA Health Policy Institute, practice ownership infographic, November 2023.
Where this leaves a decision
A label that turns on management, and says nothing about ownership, cannot settle the question a doctor is actually asking.
Two platforms can sit in the same row of the same spreadsheet and put a very different decade in front of a doctor. The category does not separate them. The documents do.
What a category cannot decide for you.
The unit
A figure about dentists is not a figure about practices. Ask which one you are being shown.
The window
Career-stage rates move sharply with time out of school. A rate quoted without its window compares to nothing.
The geography
The national figure averages markets that look nothing alike. Your state number is the one that describes yours.
What the definition omits
A measure of who runs the back office cannot tell you what happens to your equity.
Read the structure before you judge the category.
The figures on this page come from the ADA Health Policy Institute and ADEA, and each one is cited where it appears. What a specific partnership does with them should be written down before anyone signs.