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Official Description

Physician or other qualified health care professional attendance and supervision of hyperbaric oxygen therapy, per session

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Hyperbaric oxygen therapy (HBOT) is a medical treatment that involves the administration of oxygen at pressures greater than atmospheric pressure. This therapy is primarily utilized to address conditions such as decompression sickness, commonly known as 'the bends,' which occurs when a diver ascends too rapidly, leading to nitrogen bubbles forming in the bloodstream. Additionally, HBOT is indicated for air embolism, a condition where air bubbles enter the vascular system, as well as for the treatment of serious infections, severe anemia, and chronic wounds that are resistant to healing, particularly in patients with diabetes or those suffering from radiation injuries. During the procedure, patients are placed in a specialized chamber or room where the air pressure is elevated to levels that can be up to three times higher than normal atmospheric pressure. This increased pressure allows the lungs to absorb significantly more oxygen than would be possible under standard conditions. The enhanced oxygen levels in the bloodstream are crucial for restoring normal blood gas levels and promoting optimal tissue function and healing. Patients typically remain in the hyperbaric chamber for a duration of up to two hours, during which they are closely monitored by a physician or other qualified healthcare professional to assess their response to the therapy.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

Hyperbaric oxygen therapy is indicated for several specific medical conditions, which include:

  • Decompression Sickness - This condition occurs when a diver ascends too quickly, causing nitrogen bubbles to form in the bloodstream.
  • Air Embolism - A medical emergency where air bubbles enter the vascular system, potentially leading to serious complications.
  • Serious Infections - Infections that are severe and may not respond to standard treatments, requiring enhanced oxygenation for healing.
  • Severe Anemia - A condition characterized by a deficiency of red blood cells or hemoglobin, where increased oxygen delivery can be beneficial.
  • Chronic Wounds - Non-healing wounds, particularly those seen in diabetic patients or those with radiation injuries, that require improved oxygenation for healing.

2. Procedure

The procedure for hyperbaric oxygen therapy involves several key steps, which are outlined as follows:

  • Step 1: Patient Preparation - Prior to the therapy session, the patient is evaluated to ensure they meet the criteria for hyperbaric oxygen therapy. This includes a thorough medical history and assessment of the specific condition being treated.
  • Step 2: Chamber Entry - The patient is then escorted into the hyperbaric chamber, which is designed to withstand high pressure. The chamber may be a single-person unit or a larger multi-person chamber, depending on the facility.
  • Step 3: Pressure Increase - Once inside, the chamber is sealed, and the pressure is gradually increased to the prescribed level, which can be up to three times higher than normal atmospheric pressure. This process is carefully monitored to ensure patient comfort and safety.
  • Step 4: Oxygen Administration - The patient breathes 100% oxygen during the therapy session. This high concentration of oxygen is crucial for enhancing oxygen delivery to tissues and promoting healing.
  • Step 5: Monitoring - Throughout the session, the patient is continuously monitored by a physician or qualified healthcare professional. Their vital signs and response to the therapy are assessed to ensure safety and effectiveness.
  • Step 6: Pressure Decompression - At the end of the treatment session, the pressure in the chamber is gradually decreased back to normal atmospheric levels. This step is critical to prevent decompression sickness.

3. Post-Procedure

After the hyperbaric oxygen therapy session, patients may experience a range of outcomes. It is essential for healthcare professionals to provide post-procedure care instructions, which may include monitoring for any adverse reactions or side effects. Patients are typically advised to rest and hydrate adequately following the treatment. The healthcare team will also schedule follow-up appointments to assess the effectiveness of the therapy and determine if additional sessions are necessary. Continuous evaluation of the patient's condition is crucial to ensure optimal healing and recovery.

Short Descr HYPERBARIC OXYGEN THERAPY
Medium Descr PHYS/QHP ATTN&SUPVJ HYPRBARIC OXYGEN TX/SESSION
Long Descr Physician or other qualified health care professional attendance and supervision of hyperbaric oxygen therapy, per session
Status Code Active Code
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 2 - Professional Component Only Code
Multiple Procedures (51) 0 - No payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 0 - Payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Code Not Recognized by OPPS when submitted on Outpatient Hospital Part B Bill Type (12x/13x)
Type of Service (TOS) 1 - Medical Care
Berenson-Eggers TOS (BETOS) P5E - Ambulatory procedures - other
MUE 1
CCS Clinical Classification 231 - Other therapeutic procedures
GC This service has been performed in part by a resident under the direction of a teaching physician
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
GZ Item or service expected to be denied as not reasonable and necessary
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
GA Waiver of liability statement issued as required by payer policy, individual case
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
X5 Diagnostic services requested by another clinician: for reporting services by a clinician who furnishes care to the patient only as requested by another clinician or subsequent and related services requested by another clinician; this modifier is reported for patient relationships that may not be adequately captured by the above alternative categories; reporting clinician service examples include but are not limited to, the radiologist's interpretation of an imaging study requested by another clinician
GW Service not related to the hospice patient's terminal condition
25 Significant, separately identifiable evaluation and management service by the same physician or other qualified health care professional on the same day of the procedure or other service: it may be necessary to indicate that on the day a procedure or service identified by a cpt code was performed, the patient's condition required a significant, separately identifiable e/m service above and beyond the other service provided or beyond the usual preoperative and postoperative care associated with the procedure that was performed. a significant, separately identifiable e/m service is defined or substantiated by documentation that satisfies the relevant criteria for the respective e/m service to be reported (see evaluation and management services guidelines for instructions on determining level of e/m service). the e/m service may be prompted by the symptom or condition for which the procedure and/or service was provided. as such, different diagnoses are not required for reporting of the e/m services on the same date. this circumstance may be reported by adding modifier 25 to the appropriate level of e/m service. note: this modifier is not used to report an e/m service that resulted in a decision to perform surgery. see modifier 57 for significant, separately identifiable non-e/m services, see modifier 59.
CR Catastrophe/disaster related
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
Q5 Service furnished under a reciprocal billing arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
KX Requirements specified in the medical policy have been met
GY Item or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit
GX Notice of liability issued, voluntary under payer policy
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
GP Services delivered under an outpatient physical therapy plan of care
24 Unrelated evaluation and management service by the same physician or other qualified health care professional during a postoperative period: the physician or other qualified health care professional may need to indicate that an evaluation and management service was performed during a postoperative period for a reason(s) unrelated to the original procedure. this circumstance may be reported by adding modifier 24 to the appropriate level of e/m service.
26 Professional component: certain procedures are a combination of a physician or other qualified health care professional component and a technical component. when the physician or other qualified health care professional component is reported separately, the service may be identified by adding modifier 26 to the usual procedure number.
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
77 Repeat procedure by another physician or other qualified health care professional: it may be necessary to indicate that a basic procedure or service was repeated by another physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 77 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
95 Synchronous telemedicine service rendered via a real-time interactive audio and video telecommunications system: synchronous telemedicine service is defined as a real-time interaction between a physician or other qualified health care professional and a patient who is located at a distant site from the physician or other qualified health care professional. the totality of the communication of information exchanged between the physician or other qualified health care professional and the patient during the course of the synchronous telemedicine service must be of an amount and nature that would be sufficient to meet the key components and/or requirements of the same service when rendered via a face-to-face interaction. modifier 95 may only be appended to the services listed in appendix p. appendix p is the list of cpt codes for services that are typically performed face-to-face, but may be rendered via a real-time (synchronous) interactive audio and video telecommunications system.
99 Multiple modifiers: under certain circumstances 2 or more modifiers may be necessary to completely delineate a service. in such situations modifier 99 should be added to the basic procedure, and other applicable modifiers may be listed as part of the description of the service.
AG Primary physician
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
FA Left hand, thumb
FS Split (or shared) evaluation and management visit
GF Non-physician (e.g. nurse practitioner (np), certified registered nurse anesthetist (crna), certified registered nurse (crn), clinical nurse specialist (cns), physician assistant (pa)) services in a critical access hospital
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
LT Left side (used to identify procedures performed on the left side of the body)
PD Diagnostic or related non diagnostic item or service provided in a wholly owned or operated entity to a patient who is admitted as an inpatient within 3 days
PO Excepted service provided at an off-campus, outpatient, provider-based department of a hospital
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
RT Right side (used to identify procedures performed on the right side of the body)
T7 Right foot, third digit
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
Date
Action
Notes
2013-01-01 Changed Description Changed
1994-01-01 Added First appearance in code book in 1994.
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