© Copyright 2025 American Medical Association. All rights reserved.
Moderate sedation services refer to the administration of sedative agents to a patient undergoing a diagnostic or therapeutic procedure, where the sedation is provided by a physician or other qualified healthcare professional who is not the one performing the procedure itself. This service is crucial for ensuring that the patient remains comfortable and relaxed during the procedure, while still being able to respond to verbal commands and maintain their own airway. The process begins with a thorough patient assessment to evaluate their medical history and current health status. An intravenous (IV) line is then inserted to facilitate the administration of fluids and sedative medications as needed. Throughout the procedure, the patient's level of consciousness and vital signs—including oxygen saturation, heart rate, and blood pressure—are closely monitored to ensure their safety and well-being. After the procedure is completed, the healthcare professional continues to observe the patient until they have sufficiently recovered from the effects of the sedation, at which point the patient can be safely handed over to nursing staff for ongoing care. For billing purposes, the CPT® code 99157 is specifically designated for each additional 15 minutes of intraservice time beyond the initial sedation period, which is captured using codes 99155 for patients younger than 5 years and 99156 for patients aged 5 years or older.
© Copyright 2025 Coding Ahead. All rights reserved.
Moderate sedation services are indicated for patients undergoing various diagnostic or therapeutic procedures that may cause discomfort or anxiety. The following conditions may warrant the use of moderate sedation:
The procedure for administering moderate sedation involves several critical steps to ensure patient safety and comfort:
Post-procedure care involves ongoing monitoring of the patient until they have fully recovered from the effects of sedation. This includes assessing their level of consciousness, vital signs, and overall responsiveness. The healthcare professional must ensure that the patient is stable and can safely be handed over to nursing staff for continued care. It is important to provide the patient with instructions regarding post-sedation care, including potential side effects and when to seek further medical attention. The patient should also be advised not to drive or operate heavy machinery for a specified period following the sedation.
| Short Descr | MOD SED OTHER PHYS/QHP EA | Medium Descr | MOD SED OTHER PHYS/QHP EACH ADDL 15 MINS | Long Descr | Moderate sedation services provided by a physician or other qualified health care professional other than the physician or other qualified health care professional performing the diagnostic or therapeutic service that the sedation supports; each additional 15 minutes intraservice time (List separately in addition to code for primary service) | Status Code | Active Code | Global Days | ZZZ - Code Related to Another Service | PC/TC Indicator (26, TC) | 9 - Not Applicable | Multiple Procedures (51) | 9 - Concept does not apply. | Bilateral Surgery (50) | 9 - Concept does not apply. | Physician Supervisions | 09 - Concept does not apply. | Assistant Surgeon (80, 82) | 9 - Concept does not apply. | Co-Surgeons (62) | 9 - Concept does not apply. | Team Surgery (66) | 9 - Concept does not apply. | Diagnostic Imaging Family | 99 - Concept Does Not Apply | APC Status Indicator | Items and Services Packaged into APC Rates | Berenson-Eggers TOS (BETOS) | Y1 - Other - Medicare fee schedule | MUE | 6 |
This is an add-on code that must be used in conjunction with one of these primary codes.
| 99155 | MPFS Status: Active Code APC N Moderate sedation services provided by a physician or other qualified health care professional other than the physician or other qualified health care professional performing the diagnostic or therapeutic service that the sedation supports; initial 15 minutes of intraservice time, patient younger than 5 years of age | 99156 | MPFS Status: Active Code APC N Moderate sedation services provided by a physician or other qualified health care professional other than the physician or other qualified health care professional performing the diagnostic or therapeutic service that the sedation supports; initial 15 minutes of intraservice time, patient age 5 years or older |
| 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. | XU | Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service | 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. | 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. | 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. | 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.) | AQ | Physician providing a service in an unlisted health professional shortage area (hpsa) | CR | Catastrophe/disaster related | 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 | GW | Service not related to the hospice patient's terminal condition | LT | Left side (used to identify procedures performed on the left side of the body) | MC | Ordering professional is not required to consult a clinical decision support mechanism due to the significant hardship exception of electronic health record or clinical decision support mechanism vendor issues | MG | The order for this service does not have applicable appropriate use criteria in the qualified clinical decision support mechanism consulted by the ordering professional | QZ | Crna service: without medical direction by a physician | 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 | XE | Separate encounter, a service that is distinct because it occurred during a separate encounter | XP | Separate practitioner, a service that is distinct because it was performed by a different practitioner | XS | Separate structure, a service that is distinct because it was performed on a separate organ/structure |
|
Date
|
Action
|
Notes
|
|---|---|---|
| 2017-01-01 | Added | Added |