Coverage & prior-authorization note

Benefit coverage is determined by federal, state, and contractual requirements; listing of codes is for reference only and does not guarantee coverage and prior authorization may be required per contract rules.

Justify fractionation choice for bone metastases

For palliative EBRT to bone metastases, prior authorization requests should document the rationale for choosing single‑fraction 8 Gy versus a multifraction regimen, including assessment of prognosis, prior radiation, and patient goals of care.

• Document prior RT doses/exposure and goals of care per ASTRO guidance
• If selecting single‑fraction 8 Gy, note guideline support and life‑expectancy considerations

Verify dose‑fractionation and technique against guidelines

Prior authorization should verify that the prescribed radiation dose, number of fractions, and technique align with guideline‑supported regimens (for example HF‑WBI 40–42.5 Gy/15–16 fx; NCCN‑preferred APBI 30 Gy/5 fx; definitive NSCLC doses ≥60 Gy) and that IGRT or motion management is documented when OAR proximity or motion is a concern.

• Supply regimen (total dose, fractionation) and cite guideline basis when nonstandard
• Document IGRT or motion‑management plans when adjacent OARs or motion are relevant

Specify fractionation, IGRT modality/frequency, and intent

Prior authorization may require specification of the fractionation regimen, whether IGRT will be used (including modality and frequency), and the intended treatment intent (definitive vs salvage), since evidence supports specific hypofractionated schedules and daily IGRT benefits for prostate treatments.

• State intent (definitive, palliative, salvage) and list planned IGRT modality (e.g., daily CBCT) and imaging frequency
• Provide justification when requesting regimens that differ from preferred schedules

FDA device approvals are informational

FDA approvals for delivery equipment are provided for informational purposes only; device approval status does not by itself determine coverage of IGRT services.

Use Applicable Codes and follow coding clarifications

Follow the policy's Applicable Codes and Coding Clarifications for prior authorization and claims: report standard single‑isocenter 3D/IMRT/VMAT as 77407 (Level 2), use 77412 only for multiple isocenters or Level‑3 circumstances with documentation, and do not report the IGRT technical component separately when used with 2D/3D/IMRT techniques.

• If reporting 77412, include documentation justifying Level 3 complexity
• Report the professional component of IGRT as 77387-26 when applicable

Acknowledge higher retreatment rate with single 8‑Gy fraction

Evidence indicates a single 8‑Gy fraction yields similar short‑term pain relief but has a higher retreatment rate than multifraction regimens; prior authorization reviewers may expect documentation that retreatment risk was considered when selecting single‑fraction therapy.

• Document reasoning if prioritizing lower acute toxicity or convenience over higher retreatment risk

Step‑therapy: no mandated sequences in this extract

There are no mandated step‑therapy sequences in the provided extract; guideline‑preferred hypofractionation is encouraged but not required as a prior step.

Prefer guideline‑supported moderate hypofractionation when appropriate

When multiple fractionation options are appropriate, clinicians should consider moderate hypofractionation regimens supported by high‑quality evidence (for example 60 Gy in 20 fractions) and document the rationale and patient risk group.

• Document risk group and evidence basis when choosing hypofractionation
• Specify fraction size within the moderate hypofractionation range (≈2.4–3.4 Gy)

Tailor IGRT frequency to patient setup variability (e.g., BMI)

Tailor imaging frequency (daily versus abbreviated) based on patient‑specific factors such as BMI and expected setup variability; obese patients or those with greater setup errors may warrant more frequent (daily) IGRT.

• Document patient factors (e.g., BMI) that justify increased IGRT frequency
• Explain if an abbreviated imaging schedule is selected and why it is clinically appropriate

Maintain complete, legible medical records to support medical necessity

The patient's medical record must contain documentation that fully supports medical necessity, including relevant history, physical examination, and pertinent diagnostic test results; records must be legible and made available upon request.

Document justification when billing higher‑complexity or special dosimetry codes

When reporting higher complexity delivery (77412) or special dosimetry/physics services (77331, 77370, 77470, 77399), documentation must describe circumstances justifying their use (e.g., multiple isocenters, active motion management, number of measurements, complex planning) and confirm the primary radiation procedure is medically necessary.

• Specify measurements, number of dosimetry readings, or physics activities when billing 77331 or 77370
• Provide narrative justification when billing 77412 versus 77407

Document verification imaging and clinical assessment per guidelines/trials

Verification imaging and clinical assessment should be documented per trial and guideline recommendations (for example, five‑fraction whole‑breast schedules required verification imaging each fraction); include assessment of prior RT doses and normal tissue risks when selecting regimens.

• For 5‑fraction breast schedules, document verification imaging and corrections for measured displacements
• Record prior radiation exposures and OAR dose considerations when selecting treatment

Include radiation prescription, technique, and treatment intent

Provide the radiation prescription (total dose, number of fractions, fraction size), the technique (e.g., 3D‑CRT, IMRT, brachytherapy), and the clinical intent; when using non‑preferred or trial regimens, include the rationale and documentation of image guidance or motion management used.

• Include rationale when selecting APBI, SBRT, or other nonstandard regimens
• Specify any boost doses and whether included in fraction totals

Document IGRT modality, frequency, and verification method

Document the IGRT modality (for example daily CBCT), the frequency of imaging (daily, weekly, first‑fraction only), and the image verification method (on‑line vs off‑line), as these factors affect localization accuracy and may be required to support medical necessity.

• State whether verification is on‑line (physician review before each fraction) or off‑line
• If abbreviated imaging is planned, document rationale and expected corrective strategy

Maintain SOPs and QA documentation for IGRT programs

Documented standard operating procedures, interdisciplinary workflows, and a comprehensive quality assurance program are recommended to ensure safe and effective IGRT implementation and may be requested during review.

• Maintain QA logs and routine geometric accuracy checks for CT‑based IGRT
• Have SOPs describing team roles and image verification processes

Legible records required; incomplete documentation risks denial

Medical records must be legible and complete; failure to provide documentation that fully supports medical necessity may result in denial or non‑coverage determinations.

IGRT denial trigger: bony‑landmark alignment without fiducials

IGRT is not medically necessary when the policy criteria are not met, including for image guidance used solely to align to bony landmarks without implanted fiducials (for example during palliative RT).

• Do not request IGRT coverage for alignment to bony landmarks alone unless policy‑specified criteria are met

Document prognosis, prior RT, normal‑tissue risk, and patient goals

Prior to selecting a radiation regimen, document assessment of prognosis, prior radiation doses, normal tissue risks, and patient goals; failure to document these decision points could risk retrospective nonconcordance with guideline‑based care.

• Record patient goals of care and how they informed regimen selection
• Note prior RT dose/fractionation and intervals when relevant

Document dosing consistent with guideline‑preferred fractionation or rationale for deviation

If using dosing that differs from guideline‑preferred fractionation (for example whole‑breast hypofractionation 40–42.5 Gy in 15–16 fractions or APBI 30 Gy/5 fx), document the clinical rationale and evidence basis to support coverage.

• Cite trial or guideline supporting the chosen alternate regimen
• Explain patient‑specific factors that necessitate deviation from preferred dosing

Document IGRT frequency for prostate localization (daily expected standard)

For prostate localization, lack of daily IGRT when daily imaging is the expected standard may reduce anticipated clinical benefit; include documentation of IGRT frequency and localization strategy when applicable.

• If daily IGRT is not used, document alternative strategies to manage intrafraction motion and margin impact

Document QA and geometric accuracy for CT‑based IGRT as margins tighten

Implement and document geometric accuracy assessments and daily quality control procedures for CT‑based image guidance as planning margins are reduced; absence of these QA processes may undermine delivery accuracy.

• Maintain daily QC logs and geometric accuracy records when using CT‑based IGRT with tight PTV margins

Insufficient documentation may lead to denial

Incomplete or insufficient medical record documentation that does not fully support medical necessity may result in denial or non‑coverage determinations; ensure requested services are clearly justified in the chart.

• Ensure all supporting documents (history, exam, diagnostics, plan) are present and legible