What is a DSO? Dental service organizations explained

Key facts

• Definition. The ADA counts a practice as DSO-affiliated "if some outside entity managed some or all of its nonclinical functions, such as billing, marketing, human resources or more" (ADA News, Nov 2025).
• Share of dentists. 16.1% of US dentists were DSO-affiliated in 2024, versus 7.2% in 2015 (ADA HPI, 2025).
• Early-career dentists. 26.5% of dentists up to 10 years out of dental school were DSO-affiliated in 2024, against 9.1% of those more than 25 years out (same source).
• Private equity. The share of dentists affiliated with private equity rose from 6.6% in 2015 to 12.8% in 2021 (Health Affairs, Aug 2024).
• Largest DSO. Heartland Dental, which reports 1,900+ supported practices on its homepage (heartland.com, accessed 29 Sep 2026).
• Most dentists work at single-location practices. In 2024, 34% of dentists practised solo and 39% worked at a single-location practice with other dentists. 11% worked in practices with 100 or more locations (ADA HPI, 2025).

How does the DSO business model work?

A DSO signs a contract with a dental practice to provide non-clinical services for a fee. The practice keeps the clinical work: diagnosis, treatment plans and patient care. The ADSO, the DSO trade association, lists the typical services as facility maintenance, supply procurement, human resources, compliance, accounting and marketing, plus technology, training and vendor negotiation (ADSO).

The structure has three parts.

1. A dentist-owned practice entity. Most states prohibit the "corporate practice of dentistry", which stops people who aren't dentists, and companies they control, from owning or controlling a dental practice (Bass, Berry & Sims, Aug 2025). So the practice itself is usually a professional corporation or PLLC owned by a licensed dentist. This is why a DSO's offices often appear in public registers under a professional-corporation name rather than the brand on the door.
2. A management services agreement. The practice entity contracts with the DSO for business services and pays a management fee. The contract is sometimes combined with the DSO buying the practice's non-clinical assets, such as equipment and the lease. How the fee can be set depends on state law. Some states ban percentage-based management fees or have fee-splitting rules (same source). The ADA calls this agreement "one of the most important, and complex, agreements" a dentist will sign and advises review by a healthcare attorney (ADA).
3. Outside capital. Many large DSOs are backed by private equity. For example, KKR agreed to buy a majority stake in Heartland Dental in March 2018 (KKR press release, 7 Mar 2018). The investors fund the DSO's purchases of practice assets, and the DSO earns revenue from management fees.

States regulate this differently. Texas, for example, has required DSOs to register annually with the Secretary of State since a 2015 law (SB 519). The filing lists each dentist the DSO contracts with and anyone holding 10% or more of the DSO (McGuireWoods, Jul 2015). This page summarises the model. It is not legal advice.

How many dentists and practices are affiliated with a DSO?

About one US dentist in six was DSO-affiliated in 2024 (16.1%), per the ADA HPI. The share has risen every year the HPI measured it:

Source: ADA HPI, The U.S. Dentist Workforce (data as of August 2025). 2018 is not reported.

Other HPI figures from the same report:

• 17.6% of female dentists and 14.8% of male dentists were DSO-affiliated in 2024.
• Affiliation varies by state. Roughly a quarter of dentists in Arizona, Colorado, Georgia, Nevada, Oklahoma, Texas and Florida were affiliated in 2024.
• Practice ownership fell from 85% of dentists in 2005 to 73% in 2023. The HPI reads this as ownership being delayed rather than abandoned, because ownership rates "catch up" by the late career stage.

Research on private equity measures an overlapping but different group. Nasseh, Lo Sasso and Vujicic found the share of dentists affiliated with private equity rose from 6.6% in 2015 to 12.8% in 2021, with notable growth among larger practices and among specialists such as endodontists, oral surgeons and pediatric dentists (Health Affairs, Aug 2024). Not every DSO is backed by private equity.

These are shares of dentists. No free public source reports the share of practice locations that are DSO-affiliated, because the management agreement is a private contract that doesn't appear in any national register.

What are the largest DSOs?

The most recent full public top-10 we found is DrBicuspid's, published 23 December 2024 and compiled from company websites, press releases and other public material. DrBicuspid describes it as a snapshot, not a definitive ranking (DrBicuspid, Dec 2024).

Counts change quickly. Heartland's homepage reported 1,900+ supported practices and 3,100+ supported doctors when we checked on 29 September 2026. In the dentist email list, the group_affiliation column names the group behind an office where public evidence shows one.

What our NPPES data shows about dental groups

We grouped the CMS NPPES file dated 14 September 2026 into candidate practice locations and looked for signs that locations belong to the same group. 4.9% of candidate dental locations (~11,000 of ~217,000) belong to a candidate group with 10 or more locations. These are candidate groupings from public registration data, not confirmed DSO ownership.

Method. We took every active dental NPI in the 50 states and DC and clustered them by normalized practice address plus 5-digit ZIP. That gives ~217,000 candidate locations, of which ~111,000 include at least one organization (Type 2) NPI. We then linked locations two ways:

• Shared legal name: the same normalized organization legal name at two or more locations.
• Shared authorized official: the same authorized-official name and phone number on organization NPIs at two or more locations.

Candidate groups by size, linked by shared legal name

Candidate groups by size, linked by shared authorized official

A location can carry more than one organization NPI, so location links add up to more than the number of distinct locations. In distinct locations:

Counts in these tables are rounded (~) and group counts under 10 are shown as <10. The exact figures are in the data file.

What these numbers don't show

• They undercount DSOs. A DSO's practices are usually registered under many dentist-owned entities with different names, so one DSO splits into many small "groups" here. The parent-organization field doesn't fix this: Heartland Dental appears as the parent of only ~60 dental NPIs in this file, against the 1,900+ practices it reports.
• They also include groups that aren't DSOs. A shared authorized official is often a credentialing coordinator at a group's back office. A shared name can also be a dentist-owned group practice, a dental school or a community health center. The largest address clusters in the file are dental schools and a naval medical center.
• Candidate locations aren't confirmed open practices. NPPES counts registrations. In a hand check of 50 random clusters, about 10% were clearly wrong, and about a third were wrong or couldn't be verified.
• The file is stale in places. 69.7% of dental NPI records hadn't been updated in five or more years at the file date.
• Dentists versus locations. The ADA figure (11% of dentists in practices with 100+ locations) counts dentists. Our figure counts addresses. Large groups have more dentists per office, so the two measures differ even where both are accurate.

Treat 4.9% as the share of locations where public registration data shows a large group. It is a lower bound for that, and it is not a DSO market share.

Pros and cons for dentists

Dentists who join DSOs mostly cite less administration and a cheaper start. The complaint the ADA reports most is loss of control.

Reported advantages

• Less business administration. Dentists interviewed by ADA News described teams handling "marketing and advertising, payroll, overhead and budget and supplies" (ADA News, Mar 2022).
• Lower start-up cost and predictable pay and hours, which matter to graduates with student debt (same source).
• Peer support and mentoring across a network of practices (same source).

Reported drawbacks

• Control. When surveyed, dentists in DSOs said they "wanted more control over the materials used, their own time, and ... the treatment plan" (ADA, reviewed June 2023).
• Contract complexity. The ADA flags regulatory, employment, compensation and control issues in DSO business services agreements (ADA).

Pros and cons for patients

The evidence on patient outcomes is limited and mixed.

• Access. Large groups often offer evening and weekend hours and accept many insurance plans (ADA, reviewed June 2023). Private-equity-affiliated practices were more likely to take Medicaid than other practices (Health Affairs, Aug 2024).
• Prices and treatment mix. After private equity acquisition, practices raised their listed charges by 3.3% on average, while prices negotiated with insurers didn't change. Acquired offices shifted from diagnostic and preventive work toward restorative, specialty and surgical procedures, which pay more (Health Services Research, Dec 2025). The study covers private-equity-owned offices, not all DSOs.

What DSOs mean if you sell to dental practices

DSO-affiliated and independent practices buy differently, so you need to know which kind a practice is before you contact it.

• Purchasing is centralised at the DSO. Supply procurement, vendor negotiation, technology and marketing are core DSO services (ADSO). For supplies, software, marketing and staffing, the buyer is usually a procurement, operations or marketing team at the DSO, not the dentist in the office.
• One deal, many offices. Winning a DSO can cover dozens or hundreds of locations. The sale is slower, and the DSO may already have a preferred vendor.
• Most dentists are still in single-location practices. In 2024, 73% of dentists worked at a single-location practice, solo or with other dentists (ADA HPI, 2025). At these practices the owner-dentist or office manager usually decides.
• Keep the two lists apart. If headquarters buys the product, emailing each office of a DSO wastes effort and can annoy the group. If each dentist chooses it, headquarters is the wrong contact.
• Watch the growth segments. Affiliation is highest among early-career dentists (26.5%) and in states such as Arizona, Colorado, Georgia, Nevada, Oklahoma, Texas and Florida, where about a quarter of dentists were affiliated in 2024 (ADA HPI).

Our dentist list has one row per practice location and a group-affiliation column, so you can keep DSO-affiliated practices and independents apart. Where we can't link a practice to a group from public evidence, it stays unaffiliated. That doesn't prove it's independent.

How to tell if a practice is DSO-affiliated

No national register lists DSO affiliations, so you check several public clues:

1. The practice website. Look at the footer, "about" page and privacy policy for "supported by", "affiliated with" or a DSO's name. The privacy policy may name the DSO as the company that handles patient data.
2. The DSO's location finder. Large DSOs publish office locators. Search the practice's address or phone number.
3. Job listings. DSO-affiliated offices often hire through the DSO's careers site.
4. Registration data. In NPPES, look at the organization's legal name, its "other names" and its authorized official. The same official and phone number across many unrelated-looking practices suggests a group. In Texas, DSOs must file annual registrations naming the dentists they contract with.
5. Brand versus legal name. A practice that trades under one brand but is registered as a generic entity such as "[State] Dental Professionals, PC", shared with dozens of other offices, is a pattern we see in NPPES for multi-location groups.
6. Ask. The office manager will usually tell you who handles purchasing.

None of these proves ownership. A management agreement isn't ownership, and a missing clue doesn't prove a practice is independent.