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    v1.0.30
    OpenPayerBilling CodesClinical Treatment Planning (External and Internal Sources) for Radiation TreatmentCPT cpt-77295-3d-dose-reconstruction-volumetric-dose-calculation
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    CPT 77295: 3D Dose Reconstruction and Volumetric Dose Calculation

    Medicare pays $336 on average nationally for this procedure.

    CPT code 77295 describes computer-generated 3D radiographic reconstruction and volumetric dose calculation used to improve accuracy of external beam radiation therapy; documentation commonly includes 3D volume reconstruction, dose distribution maps, and dose-volume histograms and the service is performed as a treatment planning activity typically provided in an outpatient radiation oncology or hospital radiation therapy setting.

    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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    Clinical & Coding Specifications

    Clinical Context

    A 62-year-old patient with a newly diagnosed left-sided stage III non-small cell lung cancer is referred to radiation oncology for definitive external beam radiation therapy. The radiation oncologist orders a CT simulation and contouring of the tumor and organs at risk. After target volumes are defined, the medical physicist performs computer-generated radiographic reconstruction and volumetric dose calculations to generate three-dimensional dose distributions and dose-volume histograms that guide beam arrangement and monitor doses to the lungs, heart, and spinal cord. The department documents the 3D reconstructions, dose distribution maps, and summary graphs in the treatment plan record. The same workflow applies for stereotactic body radiation therapy planning, postoperative adjuvant radiation, and re-irradiation where advanced volumetric calculations improve dose accuracy and normal-tissue sparing.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    77295Computer–generated radiographic reconstruction and volumetric dose calculation (3D dose calculations, dose-volume histograms)This is the primary code for 3D volumetric dose calculation and reconstruction used to refine external beam treatment planning.
    77261Therapeutic radiology treatment planning; complexOften performed alongside 77295 when generating complex IMRT/VMAT treatment plans requiring detailed dose calculations.
    77262Therapeutic radiology treatment planning; intermediateUsed for intermediate complexity planning that may incorporate volumetric dose assessment from 77295.
    77301Radiation treatment delivery, simple (per fraction)Follows planning and calculation; delivery uses the plan produced with 77295 dose distributions.
    77336Continuing medical physics consultation, includes plan evaluation and reviewMedical physics review and ongoing consultation that references the volumetric calculations documented under 77295.

    Related Modifiers

    8 rows

    ModifierDescriptionWhen to Use
    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…
    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…
    76Modifier -76, Repeat Procedure or Service by Same Physician or Other Qualified Health Care Professional, is appended when the same provider performs an identical, medically necessary procedure or…- Use modifier -76 when the same physician or other qualified health care professional performs an identical procedure or service a second (or subsequent) time on the same date of service and the…
    77Modifier 77 indicates that a previously performed procedure or service was legitimately repeated by a different physician or other qualified health care professional. The AMA’s CPT definition…- Use modifier 77 when a basic procedure or service already performed is repeated by a different physician or other qualified health care professional (for example, a second provider independently…
    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…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207P00000X
    242T00000X
    207QD0401X
    225A00000X
    283X00000X
    364SG0600X
    2471V0105X
    2279P4000X

    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-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-77299-THERAPEUTIC-RADIOLOGY-TREATMENT-PLANNING-UNLISTED

    CPT 77299: Therapeutic Radiology Clinical Treatment Planning

    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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