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Official Description

Computed tomography guidance for placement of radiation therapy fields

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

This code, CPT® 77014, pertains to the use of computed tomography (CT) guidance specifically for the placement of radiation therapy fields. In the context of radiation therapy, accurate targeting of the treatment area is crucial for effective patient care. The procedure involves the patient remaining very still while the CT scanning is performed, which is essential for obtaining precise images. The CT technology utilizes multiple, narrow beams of x-ray that rotate around a single axis, capturing a comprehensive series of two-dimensional images from various angles. These images are then digitally reconstructed by a computer to create a three-dimensional representation of the targeted area. This advanced imaging technique allows for the acquisition of thin, cross-sectional slices of the treatment area, enabling healthcare professionals to visualize both normal and abnormal tissues within the radiation therapy field. By defining the treatment parameters based on these detailed images, clinicians can optimize the application of the radiation beam, ensuring that the intended area receives the appropriate dose while minimizing exposure to surrounding healthy tissues.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The procedure associated with CPT® 77014 is indicated for several specific scenarios where precise targeting of radiation therapy is necessary. The following conditions may warrant the use of this imaging technique:

  • Radiation Treatment Planning This procedure is essential for mapping out the volume of the area that will receive radiation treatment, ensuring that the radiation is delivered accurately to the intended site.
  • Identification of Tumor Location It aids in the precise identification of tumor locations, allowing for effective targeting of abnormal tissues while sparing healthy surrounding tissues.
  • Assessment of Treatment Fields The procedure helps in defining the treatment fields, which is critical for setting the parameters of radiation delivery.

2. Procedure

The procedure for CPT® 77014 involves several key steps that ensure accurate placement of radiation therapy fields through computed tomography guidance. Each step is crucial for achieving optimal results:

  • Patient Positioning The patient is positioned appropriately to ensure that the area of interest is accessible for imaging. Proper positioning is vital for obtaining accurate images and for the subsequent placement of radiation therapy fields.
  • CT Scanning Once the patient is positioned, the CT scanner is activated. The patient must remain very still during this process to allow for the acquisition of high-quality images. The CT machine emits multiple, narrow beams of x-ray that rotate around the patient, capturing a series of two-dimensional images from various angles.
  • Image Reconstruction After the scanning is complete, the collected data is processed by a computer, which digitally reconstructs the images into a three-dimensional format. This reconstruction provides a detailed view of the treatment area, allowing for better visualization of both normal and abnormal tissues.
  • Defining Treatment Parameters The final step involves analyzing the reconstructed images to define the treatment parameters. Clinicians assess the cross-sectional images to determine the optimal radiation beam application, ensuring that the radiation is directed precisely at the target while minimizing exposure to surrounding healthy tissues.

3. Post-Procedure

After the completion of the CT-guided placement of radiation therapy fields, there are several considerations for post-procedure care. Patients may be monitored for any immediate reactions to the procedure, although it is generally non-invasive and well-tolerated. The healthcare team will review the images obtained during the procedure to finalize the treatment plan. Patients may receive instructions regarding any follow-up appointments or additional imaging that may be necessary as part of their ongoing treatment. It is important for patients to communicate any concerns or symptoms they may experience following the procedure to their healthcare provider for appropriate management.

Short Descr CT SCAN FOR THERAPY GUIDE
Medium Descr CT GUIDANCE RADIATION THERAPY FLDS PLACEMENT
Long Descr Computed tomography guidance for placement of radiation therapy fields
Status Code Active Code
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 1 - Diagnostic Tests for Radiology Services
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) 9 - Concept does not apply.
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 Items and Services Packaged into APC Rates
ASC Payment Indicator Packaged service/item; no separate payment made.
Type of Service (TOS) 4 - Diagnostic Radiology
Berenson-Eggers TOS (BETOS) I2B - Advanced imaging - CAT/CT/CTA: other
MUE 2
CCS Clinical Classification 180 - Other CT scan
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.
TC Technical component; under certain circumstances, a charge may be made for the technical component alone; under those circumstances the technical component charge is identified by adding modifier 'tc' to the usual procedure number; technical component charges are institutional charges and not billed separately by physicians; however, portable x-ray suppliers only bill for technical component and should utilize modifier tc; the charge data from portable x-ray suppliers will then be used to build customary and prevailing profiles
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
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
GC This service has been performed in part by a resident under the direction of a teaching physician
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.
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
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.
CR Catastrophe/disaster related
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
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
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
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.
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
GW Service not related to the hospice patient's terminal condition
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
GZ Item or service expected to be denied as not reasonable and necessary
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
Q0 Investigational 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)
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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.
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.
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
G6 Esrd patient for whom less than six dialysis sessions have been provided in a month
GA Waiver of liability statement issued as required by payer policy, individual case
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
MH Unknown if ordering professional consulted a clinical decision support mechanism for this service, related information was not provided to the furnishing professional or provider
PN Non-excepted service provided at an off-campus, outpatient, provider-based department of a hospital
PO Excepted service provided at an off-campus, outpatient, provider-based department of a hospital
QT Recording and storage on tape by an analog tape recorder
SA Nurse practitioner rendering service in collaboration with a physician
XP Separate practitioner, a service that is distinct because it was performed by a different practitioner
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
Date
Action
Notes
2007-01-01 Added First appearance in code book in 2007.
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