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    v1.0.30
    OpenPayerBilling CodesClinical Treatment Planning (External and Internal Sources) for Radiation TreatmentCPT cpt-77299-therapeutic-radiology-treatment-planning-unlisted
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    CPT 77299: Therapeutic Radiology Clinical Treatment Planning

    CPT code 77299 is an unlisted code used to report therapeutic radiology clinical treatment planning services that do not have a specific CPT code; it represents customized planning activities for radiation therapy, typically performed by radiation oncologists or dosimetrists as part of radiation therapy clinical planning and is usually provided in an outpatient radiation oncology clinic or hospital radiation therapy department.

    For related coverage guidance, see recent payer policy updates: Pediatric Neurodevelopmental and Autism Spectrum Disorder (ASD) Screening Corporate Medical Policy, Inhaled Nitric Oxide Therapy (for New Mexico Only), Inhaled Nitric Oxide Therapy (for North Carolina Only).

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 62-year-old patient with locally advanced non-small cell lung cancer is referred to radiation oncology for definitive radiotherapy. The multidisciplinary team orders a complex, non-standardized clinical treatment planning session to incorporate prior thoracic surgery changes, adaptive planning for tumor shrinkage, and custom dose constraints due to prior chest irradiation. A medical physicist and radiation oncologist perform individualized target delineation, heterogeneity corrections, advanced dose calculations, and documentation of an atypical plan component not described by existing CPT codes. The planning workflow includes review of diagnostic CT/PET images, contouring of gross tumor volume and organs-at-risk, creation of a customized dose distribution, plan quality assurance, and physician sign-off. The service is performed in an outpatient radiation oncology clinic or hospital-based radiation therapy department and is reported when no specific CPT planning code accurately describes the clinical treatment planning complexity provided, using 77299 as an unlisted treatment planning code for therapeutic radiology clinical services.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    77301Intensity modulated radiotherapy plan, including dose-volume histogramPerformed when IMRT-specific planning is appropriate; 77299 may be used when planning includes atypical elements not captured by 77301.
    77295Therapeutic radiology simulation-aided field settings or field marking, includes immobilization and localization of target volumeSimulation and localization typically occur before planning; 77295 is billed for simulation services preceding complex planning under 77299.
    77336Continuing medical physics consultation, including review and provision of treatment parameters, physics plan reviewMedical physics services and plan QA accompany 77299; 77336 may be billed for ongoing physics consultation.
    77261Therapeutic radiology treatment planning — simpleUsed for simple plans; 77299 is reported when the planning is more complex and not described by 77261–77263.
    77262Therapeutic radiology treatment planning — intermediateIntermediate planning; 77299 applies when planning complexity exceeds 77262 definitions.
    77263Therapeutic radiology treatment planning — complexComplex planning code for many situations; 77299 is used when an unusual or unlisted planning component remains after 77263 does not accurately describe the service.

    Related Modifiers

    12 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…
    54Modifier ‑54 (“Surgical care only”) is appended to a CPT surgical procedure when the reporting surgeon performs the intraoperative (surgical) component but does not furnish the preoperative and/or…- Use modifier -54 when the reporting surgeon provided only the intraoperative (surgical) component of a procedure and preoperative and/or postoperative management has been or will be provided by…
    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…
    59Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
    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…

    Showing 1–10 of 12

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207RC0000X
    2084P0800X
    207VG0400X
    225CA2400X
    261QX0100X
    111NT0100X
    207XX0801X
    1835G0000X

    Related ICD-10-CM Codes

    25 rows

    ICD-10-CM CodeDescription
    C18.9Malignant neoplasm of colon, unspecified
    C20Malignant neoplasm of rectum
    C22.9Malignant neoplasm of liver, not specified as primary or secondary
    C25.9Malignant neoplasm of pancreas, unspecified
    C34.2Malignant neoplasm of middle lobe, bronchus or lung
    C34.81Malignant neoplasm of overlapping sites of right bronchus and lung
    C34.90Malignant neoplasm of unspecified part of unspecified bronchus or lung
    C43.9Malignant melanoma of skin, unspecified
    C44.311Basal cell carcinoma of skin of nose
    C50.911Malignant neoplasm of unspecified site of right female breast

    Showing 1–10 of 25

    Related Payer Policy Updates

    Specialty: Pediatrics/Neonatology1 / 3

    10 rows

    PolicyPayerEffective Date
    Pediatric Neurodevelopmental and Autism Spectrum Disorder (ASD) Screening Corporate Medical Policybcbsvermont2026-12-01
    Inhaled Nitric Oxide Therapy (for New Mexico Only)UnitedHealthcare2026-10-01
    Inhaled Nitric Oxide Therapy (for North Carolina Only)UnitedHealthcare2026-10-01
    Inhaled Nitric Oxide Therapy (for Pennsylvania Only)UnitedHealthcare2026-10-01
    Inhaled Nitric Oxide Therapy (for Kentucky Only)UnitedHealthcare2026-10-01
    Clinical Policy: NICU Apnea Bradycardia GuidelinesAmbetter Nevada2026-10-01
    DRG Newborn Inpatient Stays - FacilityBlue Cross Blue Shield - Maine2026-10-01
    Pediatric Preventive ScreeningOscar Health2026-10-01
    Infant Nutritional FormulaCigna2026-09-15
    Pediatric Preventive ScreeningBlue Cross Blue Shield - New Mexico2026-09-04

    Related Codes

    CPT-77261-RADIATION-TREATMENT-PLANNING-INITIAL

    CPT 77261: Radiation Treatment Planning, Simple

    CPT-77262-RADIATION-THERAPY-TREATMENT-PLANNING-DETAILED

    CPT 77262: Radiation Therapy Treatment Planning and Management

    CPT-77263-RADIATION-THERAPY-TREATMENT-PLANNING

    CPT 77263: Complex Radiation Therapy Treatment Planning

    CPT-77280-RADIATION-THERAPY-SIMULATION-SIMPLE

    CPT 77280: Simple Radiation Therapy Simulation and Port Localization

    CPT-77285-RADIATION-THERAPY-SIMULATION-PORT-LOCALIZATION

    CPT 77285: Radiation Therapy Simulation for Port Localization

    CPT-77290-RADIATION-TREATMENT-SIMULATION-PLANNING

    CPT 77290: 3D Radiation Therapy Simulation and Treatment Field Localization

    CPT-77293-4D-CT-RESPIRATION-CORRELATED-SIMULATION-FOR-RADIATION-PLANNING

    CPT 77293: 4D (respiration‑correlated) CT Simulation for Radiotherapy

    CPT-77295-3D-DOSE-RECONSTRUCTION-VOLUMETRIC-DOSE-CALCULATION

    CPT 77295: 3D Dose Reconstruction and Volumetric Dose Calculation

    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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