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Bettesworth Construction
Behavioral Health Design

Behavioral Health Facility Design: Inpatient Treatment Center vs. Outpatient Clinic

Inpatient and outpatient behavioral health projects have different care models and standards references. Learn what planners should verify before design begins.

By Bettesworth Construction Team 4 min read
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An inpatient behavioral health treatment center is planned for hospital-level psychiatric care, active treatment, staffing, records, and applicable observation and safety needs. An outpatient mental health clinic is planned for ambulatory services. The distinction affects which design standards to consult, but no single national checklist determines the layout of every project: begin with the relevant FGI code, then verify the adopted edition and jurisdiction-specific requirements with the authority having jurisdiction (AHJ) and the clinical design team.

How the care setting changes the design brief

“Inpatient” and “outpatient” describe different care settings and operating models, not interchangeable building types. CMS describes psychiatric hospitals as providing physician-supervised psychiatric services, meeting general hospital requirements, maintaining clinical records, meeting staffing requirements, and carrying out an active treatment program. In its Medicare coverage context, CMS describes inpatient psychiatric care as requiring an intensity and frequency of services beyond what outpatient care can provide. That coverage framing should not be treated as a universal admission rule.

An outpatient clinic delivers services without inpatient hospital admission. Its design brief depends on the provider’s actual service mix and patient population; a general outpatient clinic, outpatient psychiatric service, and crisis center should not be assumed to have identical requirements.

Which design standards should a project team start with?

The Facility Guidelines Institute (FGI) separates the relevant facility categories: its Hospital Code includes behavioral and mental health hospitals, while its Outpatient Code includes outpatient behavioral and mental health facilities and crisis centers. Consult the FGI editions page and the listings for the FGI Hospital Code and FGI Outpatient Code when identifying the potential reference for a project.

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FGI describes its codes as consensus-based baseline requirements. Its 2026 code volumes focus on minimum requirements intended for adoption and enforcement; explanatory material and best practices are in companion handbooks. Publication alone does not make an edition binding in every jurisdiction. FGI’s editions information indicated a fall 2026 release schedule, so confirm release status as well as the edition actually adopted for the project.

Federal certification rules and facility design codes are separate layers. CMS’s psychiatric hospital certification information describes federal criteria, and its inpatient psychiatric facilities regulations page links applicable federal rules. Neither page substitutes for checking state licensing, adopted building and fire codes, accessibility requirements, federal project requirements, or local requirements with the AHJ.

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Compare the project questions—not a presumed room list

Planning axis Inpatient psychiatric treatment center Outpatient behavioral health clinic
Care context Hospital or hospital psychiatric-unit context. CMS’s psychiatric-hospital description includes active treatment, staffing, records, and general hospital requirements. Ambulatory service context. FGI classifies outpatient behavioral and mental health facilities under its Outpatient Code.
Service intensity In Medicare coverage guidance, inpatient psychiatric services require greater intensity and frequency than outpatient services can provide; this is not a universal admission test. Care is delivered without inpatient hospital admission. The provider must define the service model.
Starting design reference FGI Hospital Code, alongside applicable federal rules and adopted local building and life-safety requirements. FGI Outpatient Code, with the service properly distinguished as a general clinic, outpatient psychiatric service, crisis center, or other classified program.
Population and program Age, medical acuity, geriatric needs, substance use, and other specialty populations can alter the design brief. Define the patient population and service mix before programming spaces and operations.
Supplemental guidance FGI’s Behavioral Health Design Guide and the VA inpatient guide may inform planning, within their scope and subject to applicable rules. The VA outpatient guide may inform VA projects; FGI is the broader outpatient standards reference identified here.

These comparison points help organize early planning; they are not a universal room schedule or code checklist. The applicable layout depends on the specific program and governing requirements.

Account for patient population and safety in the brief

FGI’s Behavioral Health Design Guide is scoped to general adult inpatient behavioral health units. FGI presents it as supplemental best-practice information, not a replacement for regulation or a legal standard of care. Its scope does not make it a universal guide for child and adolescent, geriatric, medically complex, or every specialty program.

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The guide discusses products considered safer for behavioral health settings, but it also states that no product is entirely without risk. Product selection should therefore be part of project-specific risk assessment and clinical, operational, and design review. A product list alone does not establish compliance, and no furnishing, fixture, alarm, or finish should be described as making a unit “ligature-proof” without authoritative, project-specific evidence.

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When VA design guides apply

The U.S. Department of Veterans Affairs publishes separate guides for Mental Health Outpatient Services and Inpatient Mental Health/Residential Rehabilitation Treatment Program facilities. They reference VA space-planning criteria and other standards, including FGI, building and life-safety standards, and accessibility criteria. They are especially relevant to VA projects, not governing design guides for every non-VA clinic or hospital. The outpatient guide is dated 2018 and the inpatient guide identifies January 2021; confirm current VA criteria before relying on either for a project.

What to confirm before design advances

  1. Define the service. Document whether the project is a hospital or hospital psychiatric unit, an outpatient clinic, a crisis center, or another service model; specify the population served and relevant clinical needs.
  2. Identify the candidate code. Use FGI’s Hospital or Outpatient Code category that corresponds to the facility type, then distinguish code requirements from supplemental handbooks and design guidance.
  3. Verify what governs locally. Ask the AHJ which edition and provisions have been adopted, and confirm applicable licensing, building, fire, accessibility, federal, and local requirements with the responsible authorities.
  4. Coordinate operational and safety needs. Have the clinical and design teams assess staffing, active treatment, records, observation, patient population, and project-specific risks before translating the brief into spaces, products, and systems.

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