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    OpenPayerBilling CodesRadiation Treatment ManagementCPT cpt-77499-unlisted-therapeutic-radiology-treatment-management
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    CPT 77499: Therapeutic Radiology Treatment Management, Unlisted

    CPT code 77499 is an unlisted therapeutic radiology procedure code used to report treatment management services for radiation therapy that do not have a specific CPT code; it typically covers individualized or uncommon radiation therapy planning and management activities delivered in an outpatient radiation oncology clinic or hospital-based radiation therapy department and is billed when standard CPT codes do not describe the specific therapeutic radiology service provided.

    For related coverage guidance, see recent payer policy updates: Radiation oncology coverage and treatment delivery guidelines, Proton Beam Therapy, Radiation and Oncologic Procedures.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult with a malignancy or benign condition requiring a customized therapeutic radiology plan that does not fit an existing CPT code. Example: a 64-year-old male with recurrent soft-tissue sarcoma of the thigh previously treated with external beam radiotherapy who develops a complex, focal recurrence in an anatomically challenging location. The radiation oncology team devises a nonstandard treatment management approach—such as a novel stereotactic boost combined with adaptive planning and additional multidisciplinary coordination—requiring individualized treatment management services.

    Workflow:

    • Referral and consultation with a radiation oncologist to evaluate prior treatment records and imaging.

    • Multidisciplinary tumor board discussion to determine feasibility of a custom therapeutic plan.

    • Development of a unique treatment management plan including individualized simulation, immobilization, image guidance, dosimetric planning and delivery strategy that are not described by an existing code.

    • Delivery of therapy with close on-treatment assessments, management of acute toxicities, and modifications to the treatment plan as medically necessary.

    • Documentation of medical necessity, detailed time and complexity, and why a standard CPT code does not describe the service, supporting the use of 77499.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    77295Special treatment procedures involving stereotactic methods, entire courseMay be used when stereotactic treatment management has a specific code set; 77499 used when treatment management does not fit specific stereotactic codes.
    77336Continuing medical physics consultation, including review of treatment plan and patient chartsSupports technical and dosimetric aspects of complex management and often billed alongside management services.
    77261Simulation; simpleUsed prior to therapeutic management for simulation; more complex simulations have higher-level codes and 77499 may accompany unique management steps.
    77370Special physics consultation; per weekApplied when specialized physics support is required for nonstandard treatment approaches described by 77499.
    77295Stereotactic body radiation therapy, treatment management (repeated entry for emphasis)Used when stereotactic management is specific; otherwise covers atypical therapeutic management not described by other codes.

    Related Modifiers

    10 rows

    ModifierDescriptionWhen to Use
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    26Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
    50Modifier –50 (Bilateral Procedure) is appended to a CPT code when an identical procedure is performed on paired anatomical structures during the same operative session. The AMA states to add…- Use modifier -50 when the same CPT surgical, diagnostic, or radiology procedure is performed on paired anatomical structures (both sides of the body) during the same operative/session by the same…
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    55Modifier –55 indicates the billing provider furnished only postoperative management for a procedure that has a global surgical period. According to AAPC, this modifier is appended to the same CPT…- Use modifier -55 when billing the same CPT surgical code that has a 10- or 90-day global period and you, as a provider other than the original surgeon, furnished ONLY postoperative management (no…
    62Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
    80CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…
    81Modifier -81 indicates a physician served as a minimal assistant surgeon for part—not all—of an operative procedure. Use when a physician’s assisting role is limited and does not represent full…- Use CPT modifier -81 when a physician acts as a minimum assistant surgeon who assists during only part (a limited portion) of an operative procedure; append -81 to the primary surgical CPT code to…
    82Modifier 82 is appended to a surgical CPT code to indicate that an attending physician acted as an assistant because a qualified resident surgeon was unavailable. In teaching hospitals it documents…- When to use: Append modifier 82 in teaching-hospital settings to indicate a physician served as an assistant surgeon because a qualified resident surgeon was unavailable (includes situations where…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207RH0000X
    207L00000X
    2085R0205X
    207K00000X
    2084P0800X
    261QM1300X
    3336L0003X
    1835G0303X

    Related ICD-10-CM Codes

    26 rows

    ICD-10-CM CodeDescription
    C16.9Malignant neoplasm of stomach, unspecified
    C18.9Malignant neoplasm of colon, unspecified
    C22.0Liver cell carcinoma
    C25.9Malignant neoplasm of pancreas, unspecified
    C34.90Malignant neoplasm of unspecified part of unspecified bronchus or lung
    C44.91Basal cell carcinoma of skin, unspecified
    C50.911Malignant neoplasm of unspecified site of right female breast
    C61Malignant neoplasm of prostate
    C67.9Malignant neoplasm of bladder, unspecified
    C71.9Malignant neoplasm of brain, unspecified

    Showing 1–10 of 26

    Related Payer Policy Updates

    Specialty: Radiation Oncology1 / 2

    10 rows

    PolicyPayerEffective Date
    Radiation oncology coverage and treatment delivery guidelinesevicore2026-11-05
    Proton Beam Therapyuniversityofutahhealthplans2026-10-25
    Radiation and Oncologic ProceduresUnitedHealthcare2026-09-01
    Electronic Brachytherapy for Nonmelanoma Skin CancerBluecross Idaho2026-07-30
    Surface Radiation Therapy for Treatment of Non-Melanoma Skin Cancereocco2026-07-09
    Radiofrequency Ablation of Tumors Outside the LiverProvidence Health Plan2026-07-01
    Therapeutic Radiopharmaceuticals in Oncology (Lutathera, Pluvicto, Xofigo) Coverage CriteriaBlue Cross Blue Shield - North Carolina2026-07-01
    Intensity Modulated Radiation TherapyAmbetter Georgia2026-06-01
    Irreversible Electroporation (IRE) of Tumors Other Than LiverBlue Cross Blue Shield - Rhode Island2026-06-01
    Irreversible Electroporation (IRE) — NanoKnife (Preauthorization Required)Blue Cross Blue Shield - Nebraska2026-06-01

    Related Codes

    CPT-77427-RADIATION-THERAPY-MANAGEMENT-EXTERNAL-BEAM

    CPT 77427: Radiation Treatment Management

    CPT-77431-RADIOTHERAPY-MANAGEMENT-ONE-TWO-FRACTION-COURSE

    CPT 77431: Management of Short-Course Fractionated Radiotherapy

    CPT-77432-SINGLE-SESSION-STEREOTACTIC-RADIOSURGERY-PROFESSIONAL

    CPT 77432: Stereotactic Radiosurgery, Single Session (Professional Component)

    CPT-77435-STEREOTACTIC-BODY-RADIOTHERAPY-TREATMENT-MANAGEMENT

    CPT 77435: Stereotactic Body Radiotherapy Course (≤5 Fractions)

    CPT-77437-SUPERFICIAL-RADIATION-THERAPY-PER-FRACTION

    CPT 77437: Superficial Radiation Therapy, Per Fraction

    CPT-77438-ORTHOVOLTAGE-SURFACE-RADIATION-THERAPY-SINGLE-FRACTION

    CPT 77438: Orthovoltage Surface Radiation Therapy, Single Fraction

    CPT-77439-ULTRASOUND-GUIDED-SRT-FIELD-PLACEMENT

    CPT 77439: Ultrasound-Guided SRT Field Localization for Cutaneous Tumors

    CPT-77469-INTRAOPERATIVE-RADIATION-THERAPY-IORT-DURING-SURGERY

    CPT 77469: Intraoperative Radiation Therapy Management

    CPT-77470-SPECIAL-RADIOTHERAPY-MANAGEMENT

    CPT 77470: Special Radiotherapy Procedures Requiring Additional Management

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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