Brachytx isodose plan simple
CPT 77316 covers the treatment planning work a radiation oncology team performs when creating a simple radiation dose map for internal radiation therapy (brachytherapy), where radioactive sources are placed inside or near a tumor.
This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.
RVU breakdown
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
NCCI bundling edits
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Billing tips
Verify that the case qualifies as 'simple' planning (1-4 sources, single plane/channel) rather than intermediate (77317) or complex (77318) to avoid undercoding
Impact: Correct code assignment: 77317 pays $397.89 (65% more) and 77318 pays $734.24 (205% more); accurate complexity documentation prevents leaving $150-$500 on the table
Document physician review and approval of the isodose plan with dated signature in the medical record, not just physicist calculations
Impact: Prevents 100% denial for lack of physician supervision; missing signature is cited in 40-60% of brachytherapy planning audits
Bill 77316 only once per brachytherapy course regardless of number of fractions, unless a new plan is created for medical necessity (document reason with modifier 76)
Impact: Duplicate billing without proper documentation results in denial of second claim ($240.66 loss); legitimate re-planning with proper modifier and notes can recover payment
Separate planning (77316) from the actual brachytherapy delivery codes (77761-77778) and radioelement application (77750) on the claim to ensure all components are paid
Impact: Bundling confusion can cause $240.66 planning payment to be absorbed; clear separation maintains full reimbursement for distinct services
For Medicare patients, verify that planning is billed within the appropriate timeframe relative to treatment delivery (typically within global period)
Impact: Late billing may trigger denials; timely filing within 30 days of plan completion ensures the full $240.66 payment
Ensure physics documentation includes specific elements: source positions, dwell times or activity, isodose curve calculations, and dose to critical structures
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