Staffing Requirements for Hyperbaric Centers

Building a Qualified Clinical, Technical, and Safety Team for Monoplace and Multiplace Operations

Staffing a hyperbaric center requires more than assigning personnel to operate a chamber. Hyperbaric oxygen therapy combines medical treatment, pressure-vessel operations, oxygen fire safety, continuous patient observation, and emergency response within an environment that limits immediate physical access to the patient.

The appropriate staffing model depends on the chamber type, number of patients treated simultaneously, patient acuity, accepted clinical indications, operating hours, and the facility’s ability to provide emergency and critical care. A center treating stable outpatients in monoplace chambers has different requirements from a hospital program treating ventilated patients in a multiplace chamber.

Staffing ratios should be treated as minimum safety parameters, not productivity targets. The medical director and hyperbaric safety leadership should increase staffing whenever patient complexity, staff experience, equipment needs, or emergency responsibilities make the minimum ratio insufficient.

Hyperbaric Medical Director Responsibilities

Every clinical hyperbaric program should have a qualified physician medical director who provides oversight for the medical use of hyperbaric oxygen.

The medical director is generally responsible for:

• Establishing patient-selection criteria
• Approving treatment protocols
• Defining provider privileges
• Supervising clinical quality
• Reviewing adverse events and near misses
• Developing emergency procedures
• Overseeing provider education and proctorship
• Coordinating with hospital leadership and referring specialists
• Ensuring treatment remains medically appropriate

The Undersea and Hyperbaric Medical Society, or UHMS, recommends that a hyperbaric medical director meet the qualifications required of an independent hyperbaric supervisor. Board certification in Undersea and Hyperbaric Medicine is strongly encouraged, particularly for leadership roles and programs managing high-acuity patients. UHMS also advises against assigning hyperbaric medical-director responsibility to a physician whose training is limited to wound care without additional education and experience in hyperbaric medicine. (UHMS)

The medical director does not necessarily need to be physically present for every administrative function, but the program must have qualified clinical coverage whenever patients are undergoing treatment. The medical director should also ensure that privileges are limited to the indications, chamber configurations, and patient-acuity levels each provider is trained to manage. (UHMS)

Physician or Qualified Provider Attendance

Hyperbaric oxygen therapy is a medical procedure that requires appropriate clinical attendance and supervision throughout the treatment session.

The attending provider should be able to:

• Confirm the indication and treatment prescription
• Evaluate the patient before treatment
• Identify new contraindications or clinical instability
• Modify or terminate the treatment when necessary
• Manage oxygen toxicity, barotrauma, chest pain, neurologic symptoms, hypoglycemia, and other complications
• Coordinate emergency decompression and transfer
• Document the treatment and patient response

CMS recognizes physician attendance and supervision of HBOT under CPT code 99183. Current Medicare coding guidance states that the code includes the evaluation and management work directly related to the hyperbaric treatment. (CMS Downloads)

UHMS guidance states that hyperbaric treatments should be prescribed and supervised by qualified clinicians with appropriate training. The attending provider must remain immediately available to the chamber throughout the treatment session. The physical separation created by a pressurized chamber makes it essential that the provider can rapidly identify and manage systemic complications. (UHMS)

Advanced practice providers may attend HBOT under defined circumstances when permitted by state law, hospital bylaws, payer rules, scope-of-practice requirements, and collaborative agreements. Current UHMS guidance requires appropriate hyperbaric education, proctored experience, facility privileges, immediate availability to the chamber, and physician backup with a reasonable in-person response time. The physician retains responsibility for ensuring that the patient’s complexity can be managed safely under that supervision model. (UHMS)

Programs should verify current state and payer requirements rather than assuming that one supervision model applies nationally.

Hyperbaric Provider Training and Privileging

Completion of a foundational hyperbaric medicine course is only the beginning of provider preparation. UHMS-approved foundational courses include at least 40 hours of hyperbaric-specific education, equipment familiarization, assessment, and practical instruction. (UHMS)

Providers should also complete a documented proctorship before independently attending treatments. The April 2026 UHMS credentialing guideline recommends at least five proctored consultations and attendance of more than 25 hyperbaric sessions, followed by review of the next 100 treatments through an appropriate professional-practice evaluation process. (UHMS)

Privileges should specify:

• Which hyperbaric indications the provider may treat
• Whether the provider may manage stable or critically ill patients
• Which chamber types the provider may supervise
• Whether pediatric or ventilated patients are included
• Any procedures the provider may perform
• Required backup or proctoring arrangements

UHMS recommends that privileges be granted according to demonstrated education, licensure, experience, patient acuity, and the technical capabilities of the facility. A provider qualified to attend stable outpatient treatments should not automatically be privileged to manage ventilated or hemodynamically unstable patients. (UHMS)

Continued competency also requires ongoing clinical activity and education. The 2026 UHMS guideline recommends at least 12 hours of relevant continuing medical education each year, or 24 hours over two years, along with evidence of recent hyperbaric clinical experience. (UHMS)

The Role of the Hyperbaric Registered Nurse

Registered nurses are central to many hospital and outpatient hyperbaric programs. Their responsibilities often extend across patient assessment, treatment preparation, wound care, chamber operation, education, monitoring, and emergency response.

Depending on facility policy and individual qualifications, a hyperbaric nurse may perform:

• Pre-treatment clinical assessment
• Medication reconciliation
• Vital-sign monitoring
• Blood glucose testing and management
• Patient and family education
• Evaluation of pressure-equalization concerns
• Wound assessment and documentation
• Management of vascular access and approved infusions
• Chamber operation
• Inside-attendant duties
• Recognition of oxygen toxicity and clinical deterioration
• Post-treatment assessment

Hyperbaric nursing requires knowledge that extends beyond routine wound care. Nurses must understand gas behavior, pressure-related injury, oxygen toxicity, fire safety, chamber operations, emergency decompression, and the effects of pressure on medical equipment.

UHMS materials recognize registered nurses and licensed practical nurses among the healthcare professionals who may work as chamber operators or inside attendants when appropriately educated, trained, and authorized by the facility. (UHMS)

Certification as a Certified Hyperbaric Registered Nurse can provide evidence of specialty knowledge and professional development. Certification does not replace facility-specific orientation, competency validation, or compliance with nursing scope-of-practice requirements.

Hyperbaric Technologists and Chamber Operators

The chamber operator manages the technical execution of the prescribed treatment. This role requires continuous attention throughout compression, time at treatment pressure, oxygen-breathing periods, air breaks, and decompression.

Operator responsibilities may include:

• Verifying the prescribed treatment profile
• Conducting operational safety checks
• Controlling compression and decompression
• Monitoring chamber pressure and gas systems
• Maintaining communication with the patient or inside attendant
• Recording treatment events
• Responding to alarms and equipment abnormalities
• Supporting emergency procedures
• Completing post-treatment equipment checks

The operator must understand both normal chamber function and the consequences of equipment or human error under pressure.

For monoplace facilities, an often-cited industry benchmark is one chamber operator for every two operating chambers. This should not be interpreted as a universal regulatory limit or as permission to operate two chambers regardless of patient condition. A patient with significant medical instability, communication difficulty, anxiety, airway risk, or complex equipment may require dedicated one-to-one observation. (UHMS)

The operator ratio also does not replace the need for nursing assessment, provider attendance, safety oversight, or personnel available to respond to an emergency. One person should not be expected to operate chambers, prepare incoming patients, discharge completed patients, perform wound care, and manage an emergency simultaneously.

Certification as a Certified Hyperbaric Technologist is commonly used to demonstrate specialty competency. UHMS and the National Board of Diving and Hyperbaric Medical Technology provide certification pathways for hyperbaric technologists and registered nurses. (UHMS)

Monoplace Hyperbaric Chamber Staffing

A monoplace chamber treats one patient at a time, with staff remaining outside the chamber. This arrangement may appear less staffing intensive than multiplace operation, but the physical barrier between the patient and staff creates its own safety demands.

A basic monoplace treatment team commonly includes:

• A qualified attending provider
• A trained chamber operator
• A nurse or other clinical professional capable of assessing the patient and responding to complications
• Access to the hyperbaric safety director or designated safety personnel
• Additional support for patient transfer, emergency care, or complex equipment when required

Several chambers may be operated within one treatment area, but the facility must preserve uninterrupted visual and verbal observation of each patient. Staffing must also account for staggered compression and decompression, patient preparation, glucose checks, bathroom needs, wound dressings, and post-treatment assessment.

A two-chamber assignment may be reasonable for stable, communicative patients undergoing routine protocols. The ratio should be reduced when a patient:

• Is medically unstable
• Requires continuous cardiovascular monitoring
• Has a difficult airway
• Is ventilated
• Requires intravenous medication or complex equipment
• Has significant anxiety or cognitive impairment
• Cannot report symptoms reliably
• Is receiving an urgent treatment
• Has a history of oxygen toxicity or pressure intolerance

A center should not calculate monoplace staffing solely by dividing the number of chambers by two. The actual workload includes patients outside the chamber who are being prepared, evaluated, or discharged.

Multiplace Hyperbaric Chamber Staffing

A multiplace chamber requires both internal and external personnel. Patients are generally treated inside an air-pressurized chamber while breathing oxygen through masks, hoods, or airway circuits.

UHMS minimum-staffing guidance identifies a core operational team that includes:

• One chamber operator
• At least one inside attendant
• At least one outside attendant who is available to support the chamber operation

These roles should be assigned before treatment begins and should not be combined in a way that leaves a critical responsibility unattended. (UHMS)

The number of inside attendants should reflect the needs of the patients under pressure. UHMS guidance identifies a minimum patient-to-attendant ratio of approximately 6:1 for uncomplicated ambulatory patients and 4:1 for patients requiring an increased level of personal care. (UHMS)

For intubated or severely ill acute-care patients, the recommended ratio is one inside attendant per patient. Some patients may require more than one attendant because of ventilation, infusion management, positioning, behavioral needs, or the potential for rapid deterioration. Direct access to a hyperbaric-trained physician is mandatory during treatment of critically ill or intubated patients. (UHMS)

These ratios are minimums. A chamber containing several ambulatory patients and one unstable patient should be staffed according to the most resource-intensive patient, not simply according to the total census.

Inside Attendant Qualifications and Medical Fitness

The inside attendant remains under pressure with patients and provides direct clinical assistance during the treatment.

Depending on patient needs, the attendant may:

• Fit and monitor oxygen masks or hoods
• Assist with ear-pressure equalization
• Manage airway or ventilator equipment
• Administer approved medications
• Monitor infusions
• Respond to anxiety, nausea, pain, or neurologic symptoms
• Perform emergency interventions
• Coordinate with the chamber operator and attending provider

Because inside attendants are repeatedly exposed to increased ambient pressure, they require medical fitness assessment and occupational exposure management. Current UHMS guidance addresses the medical fitness of multiplace inside attendants and recommends involvement of a physician with appropriate hyperbaric training in determining fitness for pressure exposure. (UHMS)

Scheduling should account for cumulative pressure exposure, decompression requirements, pregnancy policies, respiratory illness, medication changes, and other conditions that may affect an attendant’s fitness to enter the chamber.

An employee who is unavailable for inside-attendant duty because of illness or medical restriction should not be counted toward the minimum chamber staffing level.

The Outside Attendant and Emergency Support Role

The outside attendant supports the chamber team while remaining available in the treatment area. This individual may help manage gas systems, equipment transfer, patient records, emergency supplies, communications, and coordination with hospital responders.

The outside attendant is particularly important during:

• Medical deterioration inside the chamber
• Emergency decompression
• Equipment or gas-supply failure
• Transfer of supplies through a medical lock
• Fire or evacuation
• Communication failure
• Staff replacement or occupational decompression issues

The chamber operator should not be expected to leave the controls to obtain emergency equipment or summon assistance. Similarly, the attending provider should not be the only person available outside the chamber to manage all operational and clinical duties.

Hyperbaric Safety Director or Safety Coordinator

Every hyperbaric program should designate an individual responsible for coordinating the facility’s technical and fire-safety program.

Responsibilities commonly include:

• Reviewing items proposed for chamber use
• Maintaining prohibited-item controls
• Coordinating preventive maintenance
• Overseeing fire-safety education
• Verifying staff competencies
• Planning and evaluating emergency drills
• Reviewing incidents and near misses
• Participating in equipment purchasing
• Managing chamber-specific safety policies
• Coordinating with facilities, engineering, and the fire authority

The title may be Hyperbaric Safety Director or Hyperbaric Safety Coordinator depending on organizational authority and reporting structure. The essential requirement is that the individual has clearly defined responsibility and enough authority to remove unsafe equipment, prohibit an item, or stop a treatment when a safety concern has not been resolved. (UHMS)

This role should not exist only on paper. The safety professional needs protected time for product review, education, drills, preventive maintenance oversight, and policy development.

UHMS accreditation is designed to evaluate staffing, safety systems, training, equipment, and the professional application of hyperbaric treatment. Building staffing policies around recognized accreditation requirements helps a program move beyond informal, person-dependent practices. (UHMS)

Respiratory Therapy and Critical Care Staffing

A program treating ventilated, sedated, or hemodynamically unstable patients requires staff with critical-care competencies in addition to routine hyperbaric training.

The team may need:

• A respiratory therapist
• A critical-care nurse
• A physician experienced in critical illness
• Additional inside attendants
• Pharmacy and infusion support
• Immediate access to anesthesia, emergency medicine, surgery, or intensive care

Ventilator performance, airway-cuff pressure, infusion delivery, gas-filled components, and monitoring equipment can change under pressure. Staff must understand how the specific equipment behaves within the planned treatment environment.

The April 2026 UHMS credentialing guideline separates privileges for stable-patient attendance from privileges for critical-care HBOT. Providers managing critical-care patients should be competent in continuous cardiac monitoring, intravenous infusions, hemodynamic support, and mechanical ventilation. The facility must also have the technical and logistical capability to provide that care under pressure. (UHMS)

A center should not accept ventilated or unstable patients because the chamber can physically accommodate them. It should do so only when the complete clinical team can maintain an appropriate level of care throughout transport, chamber treatment, and emergency decompression.

Wound Care and Supporting Clinical Personnel

Many hyperbaric programs are integrated with wound-care services. This creates opportunities for coordinated care, but wound-clinic staffing and hyperbaric staffing should not be treated as interchangeable.

A wound-care clinician may be occupied with debridement, dressing selection, vascular assessment, or another patient while chamber treatments are underway. The center must ensure that hyperbaric observation and emergency responsibilities remain continuously covered.

Supporting clinical personnel may include:

• Wound-care nurses
• Medical assistants
• Podiatric or surgical clinicians
• Vascular laboratory personnel
• Dietitians
• Diabetes educators
• Infectious disease specialists
• Rehabilitation staff
• Case managers

These professionals improve the broader care plan but generally do not replace the chamber operator, attending provider, inside attendant, or safety personnel required for active HBOT.

Administrative and Revenue-Cycle Staffing

A sustainable hyperbaric center also requires administrative support. Treatment courses may involve prior authorization, payer-specific documentation, daily scheduling, transportation challenges, and repeated reassessment.

Administrative roles may include:

• Program manager
• Scheduler
• Prior-authorization specialist
• Medical-records or documentation support
• Revenue-cycle specialist
• Referral coordinator
• Quality and accreditation support

CMS covers HBOT only for specified conditions and applies additional requirements to certain indications. Administrative personnel should understand the difference between a referral, a clinically appropriate treatment, and a reimbursable treatment under a particular payer policy. (Centers for Medicare & Medicaid Services)

Insufficient administrative staffing can create clinical problems. Authorization delays may postpone time-sensitive treatment, incomplete records may prevent proper patient selection, and poor scheduling may create unsafe overlap between complex patients.

After-Hours and Emergency Coverage

A center advertising 24-hour emergency capability needs more than an on-call physician.

The emergency staffing plan should identify:

• Who activates the chamber team
• Who operates the chamber
• Who serves as inside and outside attendant
• Who provides physician attendance
• How respiratory therapy and critical care support are obtained
• Who prepares the chamber and safety equipment
• How surgery, emergency medicine, and intensive care are coordinated
• What happens when key personnel are unavailable

Emergency indications such as carbon monoxide poisoning, arterial gas embolism, decompression sickness, necrotizing infection, or acute traumatic ischemia may involve unstable patients and time-sensitive decisions.

Current UHMS guidance permits qualified advanced practice providers to support 24-hour coverage only under defined credentialing and physician-backup conditions. A physician qualified as an independent hyperbaric supervisor must remain available by telephone and be able to respond in person within the period established by hospital policy. (UHMS)

The program should conduct unannounced or realistic after-hours drills. A coverage schedule that appears adequate during business hours may fail when staff must travel from home, locate chamber-compatible equipment, and coordinate with an emergency department at night.

Competency Validation and Emergency Drills

Staffing numbers alone do not establish readiness. Every person assigned to the chamber area must understand their role during normal and emergency operations.

Competency validation should include:

• Chamber startup and shutdown
• Treatment-profile verification
• Compression and decompression
• Oxygen-delivery systems
• Fire prevention
• Prohibited-item screening
• Ear and sinus pressure problems
• Oxygen-toxicity response
• Hypoglycemia
• Chest pain and respiratory distress
• Cardiac arrest
• Seizure management
• Gas-supply or power failure
• Emergency decompression
• Evacuation
• Equipment malfunction

Competency should be evaluated through direct observation and simulation, not only through completion of an online module or attendance certificate.

The FDA advises hyperbaric facilities to maintain staff training, continuously monitor patients, follow manufacturer operating instructions, perform required maintenance, and maintain fire-prevention procedures. (Mayo Clinic)

Drills should test communication and decision-making as well as individual technical skills. The team should know who controls the chamber, who manages the patient, who calls the emergency response team, and who protects the other patients in the facility.

Buildi£ng a Staffing Matrix for the Center

A useful staffing plan should define minimum coverage for each chamber configuration and patient-acuity category.

The matrix may include separate plans for:

• Stable monoplace outpatients
• Multiple simultaneous monoplace treatments
• Patients requiring continuous monitoring
• Pediatric or cognitively impaired patients
• Stable multiplace groups
• High-dependency multiplace patients
• Intubated or critically ill patients
• Emergency and after-hours treatments
• Treatments involving inside attendants
• Planned maintenance or reduced chamber availability

For each scenario, the matrix should specify:

• Attending provider
• Chamber operator
• Registered nurse
• Inside attendant
• Outside attendant
• Respiratory therapist
• Safety coverage
• Emergency backup
• Maximum patient census

The matrix should also define when staffing must be increased. Triggers may include a new ventilated patient, staff inexperience, multiple high-risk patients, complex oxygen-delivery equipment, emergency transfers, or simultaneous treatment and wound-care activity.

Staffing for Safety Rather Than Maximum Throughput

Hyperbaric staffing should be designed around the team’s ability to recognize deterioration and act immediately. A chamber may continue operating normally while the patient develops hypoglycemia, chest pain, oxygen toxicity, respiratory distress, or an anxiety reaction. The staff must notice the change, interpret it correctly, and respond without abandoning other patients.

A center should reconsider its staffing model when personnel routinely:

• Monitor more patients than they can observe continuously
• Leave chamber controls unattended
• Perform wound procedures while operating chambers
• Rely on administrative personnel for clinical observation
• Combine inside, outside, and operator responsibilities unsafely
• Lack immediate backup during emergencies
• Work without current competency validation
• Depend on one individual whose absence closes the program

The required headcount is not determined solely by the number of chambers. It is determined by the clinical responsibilities that must remain covered at the same time.

A well-staffed hyperbaric center has clear medical leadership, trained chamber personnel, nursing support, active safety oversight, and scalable critical-care resources. It also maintains enough redundancy to respond when a patient deteriorates, equipment fails, or an employee becomes unavailable.