Do you need an MSO for your ABA practice in Colorado?

Why Colorado is strict on corporate practice, and why that misses ABA

Colorado is not a permissive state on corporate practice of medicine. It enforces the doctrine through statute: a professional service corporation for the practice of medicine must have its shareholders be physicians licensed in Colorado, with a narrow physician-assistant exception and physician-majority ownership (C.R.S. § 12-240-138), and the Medical Practice Act treats practicing medicine as an employee or in collaboration with an unlicensed entity as unprofessional conduct. Non-physicians cannot own or control a medical practice.

The reason that strictness does not land on a pure ABA practice is simple: the doctrine protects the practice of medicine and other licensed professions, not behavior analysis. Colorado now licenses behavior analysts (HB26-1425, effective July 1, 2028), but that license attaches to the individual practitioner and carries no ownership or professional-entity requirement, and the corporate-practice doctrine remains medicine-specific. So a practice that delivers only ABA, by licensed behavior analysts, with no other licensed profession in the clinical chain, sits outside the corporate-practice restriction that would otherwise force a licensee-owned entity.

ABA licensure and what it does not change

Colorado was for years without state-level licensure for behavior analysts, but that changed in 2026. The Applied Behavior Analysis Practice Act (HB26-1425), signed June 2, 2026, added article 247 to title 12 and created the Colorado Behavior Analyst Licensing Board within the Division of Professions and Occupations; the practice-license requirement takes effect July 1, 2028, built on a current certification from a certifying entity such as the BACB. Crucially for ownership, the act licenses individuals only. It does not require a professional entity, cap non-licensee ownership, or attach a corporate-practice rule, so it does not change the open-ownership answer for a pure ABA practice.

There is one historical wrinkle. Before the ABA Practice Act, Colorado treated applied behavior analysis as falling within the legal definition of psychotherapy, and behavior analysts practicing under that definition registered as Unlicensed Psychotherapists with DORA under the Mental Health Practice Act. That registry changed in 2022: HB22-1307 restored the "Unlicensed Psychotherapist" label and discontinued the process for registering new unlicensed psychotherapists, with existing registrants able to renew. The dedicated behavior-analyst license enacted in 2026 supersedes that path for ABA as the practice-license date approaches. Confirm current DORA and Behavior Analyst Licensing Board requirements for your specific scope of practice.

Where the strict rules catch you anyway

The permissive answer is specific to a pure ABA practice. The moment your clinical model involves a licensed profession, Colorado's strict rules apply to those services. Common triggers: a licensed psychologist supervising or delivering services, diagnostic or psychological testing, psychiatry or medication management added as the group grows, or operating under the psychotherapy and Mental Health Practice Act framework. For any of those licensed services, the professional-entity ownership rules and the corporate-practice restriction apply, and a non-licensee cannot own that part of the practice. Multidisciplinary groups in Colorado therefore look more like the strict-state structure than the permissive one.

Who is allowed to own the practice

For a pure ABA practice, ownership is open: a standard LLC formed under the Colorado LLC Act (C.R.S. Title 7, Article 80) and owned by a non-licensee can deliver ABA through BCBAs. A professional LLC or professional corporation is available if you prefer, but it is not required where no licensed profession is involved. Where a licensed profession is involved, ownership of that entity follows Colorado's professional-entity rules, which for medicine require licensed-physician ownership (C.R.S. § 12-240-138), and the analogous mental-health professional-entity rules apply to psychology and counseling.

What a management services organization actually is

An MSO is a separate company that provides the non-clinical side of a practice to a clinical entity it does not own. The clinical entity employs the clinicians; the MSO employs everyone else and runs the business. A management services agreement ties them together, and the clinical entity pays the MSO a fee. In a strict state the two must be separate because the clinical entity has to stay licensee-owned. For pure ABA in Colorado you may not need the split, but the model still has uses.

When you would still want an MSO in Colorado

Three situations make an MSO worthwhile even for a pure ABA practice. First, a multidisciplinary model: the moment psychologists or physicians are involved, the licensed-profession services must sit in a licensee-owned entity, and an MSO is how outside capital participates. Second, multistate scale: a single management company across separate, locally compliant clinical entities is cleaner than a different structure in each state. Third, private equity, which prefers a clean, sellable management company. See the practice expansion and sale page for the transaction view.

How Colorado would evaluate your arrangement

The decisive question is whether a licensed profession is in the chain. These factors follow from that.

Fee design and fee-splitting

For a pure ABA practice, Colorado does not impose a percentage-fee ban, and fixed or cost-plus management fees set to fair market value are the safest because they trace to documented services. Where a licensed profession is involved, the stricter fee-splitting and professional-conduct rules for that profession apply. For Medicaid clients, the federal anti-kickback statute applies on top (42 U.S.C. § 1320a-7b(b)).

Keeping clinical judgment with the clinician

In every model, the clinician keeps authority over clinical decisions, assessment, treatment planning, and supervision. For pure ABA that is good practice and good positioning. For any licensed-profession services it is a hard legal line, because Colorado's corporate-practice doctrine treats non-licensee control of those services as a violation. Write the operating documents so clinical judgment stays with the clinician across the whole group.

How this connects to the rest of your compliance stack

Ownership is one layer. Three others interact with it directly:

• Payor and Medicaid disclosure. Your real ownership stack, including any MSO, is disclosed at enrollment and revalidation (42 C.F.R. Part 455); Health First Colorado expects BACB-credentialed providers. See Medicaid and insurance mandates.
• Facility licensure. A change in the service model can affect facility and records obligations. See facility licensure and HIPAA.
• Entity structure. Standard LLC for pure ABA versus professional entity for licensed-profession services is its own analysis. See entity structures for ABA practices.

Setting it up in Colorado: the sequence

1. Map your clinical model. Decide whether any licensed profession (psychology, medicine, counseling) is in your clinical chain. That single fact decides whether you are in the permissive or the strict lane.
2. Form the entity to match. Pure ABA can use a standard LLC (C.R.S. Title 7, Article 80). Licensed-profession services need the appropriate licensee-owned professional entity (for medicine, C.R.S. 12-240-138).
3. Check the psychotherapy framework. Confirm whether your scope triggers the Mental Health Practice Act and current DORA requirements, given HB22-1307.
4. Decide whether you need an MSO. For pure single-state ABA, often not. For multidisciplinary, multistate, or PE, build one.
5. If using an MSO, paper it carefully. Set the fee to fair market value and keep clinical control with the clinician.
6. Confirm with Colorado healthcare counsel. The line between the permissive and strict lanes is exactly where advice pays off.

Colorado MSO variables at a glance

Frequently asked questions