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Official Description

Proton treatment delivery; intermediate

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 77523 refers to the delivery of proton treatment, specifically categorized as intermediate. This procedure involves the administration of radiation therapy using a proton beam, which is a type of particle therapy that utilizes protons to target tumors. The precision of proton therapy allows for the effective treatment of tumors that are situated deep within the body, often surrounded by significant amounts of healthy tissue. By focusing the proton beam directly on the tumor, the risk of damaging adjacent healthy tissues is minimized, making it a preferred option for certain types of cancers. The procedure is characterized by its delivery to two or more treatment areas, which may involve the use of two or more ports or a combination of tangential and oblique ports. Additionally, custom blocks and compensators are employed to enhance the accuracy and effectiveness of the treatment, ensuring that the proton beam conforms to the shape of the tumor while sparing surrounding healthy structures.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure associated with CPT® Code 77523 is indicated for the treatment of tumors that require precise targeting due to their location beneath healthy tissue. The following conditions may warrant the use of proton treatment delivery:

  • Deep-seated tumors Tumors located deep within the body that are difficult to treat with conventional radiation therapy due to the risk of damaging surrounding healthy tissue.
  • Specific cancer types Certain cancers, such as pediatric tumors, brain tumors, and prostate cancer, may benefit from the targeted approach of proton therapy.
  • Recurrent tumors Tumors that have recurred after previous treatments may be treated with proton therapy to minimize further damage to healthy tissue.

2. Procedure

The procedure for CPT® Code 77523 involves several key steps to ensure the effective delivery of proton therapy. The following outlines the procedural steps:

  • Preparation and Planning Prior to the treatment, a comprehensive planning process is conducted, which includes imaging studies to accurately locate the tumor and assess its size and shape. This information is crucial for developing a customized treatment plan that targets the tumor while protecting surrounding healthy tissue.
  • Patient Positioning The patient is positioned on the treatment table in a manner that optimally aligns the tumor with the proton beam. This may involve the use of immobilization devices to ensure that the patient remains still during the treatment.
  • Delivery of Proton Beam The proton beam is delivered to the tumor through the use of two or more treatment areas. This may involve the use of two or more ports or a combination of tangential and oblique ports. The treatment team carefully monitors the delivery of the proton beam to ensure that it is accurately aimed at the tumor.
  • Use of Custom Blocks and Compensators Custom blocks and compensators are utilized to shape the proton beam, allowing it to conform to the contours of the tumor. This customization is essential for maximizing the dose delivered to the tumor while minimizing exposure to surrounding healthy tissues.

3. Post-Procedure

After the completion of the proton treatment delivery, patients may be monitored for any immediate side effects or reactions to the therapy. Post-procedure care typically includes follow-up appointments to assess the effectiveness of the treatment and to monitor for any potential complications. Patients may experience some fatigue or localized skin reactions, which should be managed according to the healthcare provider's recommendations. Ongoing assessments will help determine the need for additional treatments or interventions as part of the overall cancer care plan.

Short Descr PROTON TRMT INTERMEDIATE
Medium Descr PROTON TX DELIVERY INTERMEDIATE
Long Descr Proton treatment delivery; intermediate
Status Code Carriers Price the Code
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 3 - Technical 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 Procedure or Service, Not Discounted when Multiple
ASC Payment Indicator Radiology service paid separately when provided integral to a surgical procedure on ASC list; payment based on OPPS relative payment weight.
Type of Service (TOS) 6 - Therapeutic Radiology
Berenson-Eggers TOS (BETOS) P7A - Oncology - radiation therapy
MUE 2
CCS Clinical Classification 211 - Therapeutic radiology
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
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.
Q0 Investigational clinical service provided in a clinical research study that is in an approved clinical research study
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.
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
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.
AM Physician, team member service
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
QT Recording and storage on tape by an analog tape recorder
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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
2011-01-01 Changed Short description changed.
2001-01-01 Changed Code description changed.
2000-01-01 Added First appearance in code book in 2000.
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