CPT 77427Radiology

Radiation tx management x5

CPT 77427 covers the physician's work managing a patient's radiation therapy treatment over five sessions. This includes reviewing the treatment plan, assessing patient response, and making necessary adjustments during the course of therapy.

Showing rates for

National Average

Base Medicare rate

$187.93

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

Work RVU

3.37

PE RVU (NF)

2.17

MP RVU

0.27

Total RVU

5.81

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Bill 77427 only after five treatment fractions have been delivered and managed, not in advance. Wait until the fifth fraction is complete before submitting the claim.
Impact: Prevents denials for services not yet rendered and reduces audit risk. Premature billing is a top reason for 77427 recoupment.
Track fraction counts meticulously across calendar months and payer changes. If patient switches insurance mid-treatment, ensure proper allocation of management codes to each payer.
Impact: Prevents overlapping claims and duplicate payment denials. A single misallocated fraction can trigger review of entire treatment course.
Use 77431 (1-2 fractions) or 77432 (3-4 fractions) for incomplete weeks or when treatment ends before reaching five fractions, rather than billing 77427 with modifier 52.
Impact: 77431 pays approximately $75-80 for 1-2 fractions versus reduced 77427 payment. Proper code selection optimizes reimbursement and reduces claim scrutiny.
Document physician review of treatment parameters, port films, patient assessment, and treatment toxicity for each management period. Generic templates increase audit risk.
Impact: Detailed documentation supports the 5.81 RVUs and $187.93 payment. Vague notes are the primary reason for downcoding or denial on appeal.
Do not bill treatment management codes on the same date as treatment devices (77427 with 77280-77295) or simulation (77295, 77300). These represent different time periods.
Impact: Billing simulation and management on same date triggers automatic NCCI edits and denials. Separate dates of service by the actual timeline of care.
For patients receiving both IMRT and brachytherapy, track external beam fractions separately. Management codes are specific to treatment modality and delivery schedule.

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Frequently asked questions

How much does Medicare pay for CPT code 77427 in 2025?

Medicare pays $187.93 for CPT 77427 in 2025 under the Physician Fee Schedule (both facility and non-facility rates). This rate is based on 5.81 total RVUs multiplied by the 2025 conversion factor of 32.3465. Actual payment may vary by geographic location due to locality-based adjustments.

How many fractions are required to bill CPT 77427?

CPT 77427 requires exactly five treatment fractions to be delivered and managed. If fewer fractions are delivered, use CPT 77431 for 1-2 fractions or CPT 77432 for 3-4 fractions instead. Do not bill 77427 until all five fractions have been completed and physician management has been documented.

Can CPT 77427 be billed multiple times for the same patient?

Yes, CPT 77427 can be billed multiple times during a radiation treatment course, with each claim representing a distinct five-fraction management period. For example, a patient receiving 30 fractions would generate six separate 77427 claims. However, the five-fraction periods cannot overlap, and documentation must clearly identify which fractions correspond to each management code.

What is the difference between CPT 77427 and 77431?

CPT 77427 covers management of five treatment fractions, while CPT 77431 covers management of 1-2 fractions. Use 77431 when treatment is interrupted, discontinued early, or at the end of a course when fewer than five fractions remain. The RVU and payment for 77431 are proportionally lower than 77427.

What documentation is required to support billing CPT 77427?

Documentation must include the specific dates of all five fractions managed, physician assessment of patient response and toxicity, review of treatment parameters and dose delivery, evaluation of port films or imaging, any treatment modifications, and physician signature. Generic templates or copy-forward notes without specific clinical findings significantly increase audit risk and denial likelihood.

Can CPT 77427 be billed with an E/M visit on the same day?

Generally no, because the physician work in 77427 includes patient evaluation during the management period. However, if a significant, separately identifiable E/M service is provided for an unrelated problem or complication requiring additional work beyond routine treatment management, it may be billable with modifier 25. This requires clear documentation distinguishing the separate service and is subject to payer scrutiny.

What are the RVUs for CPT code 77427 in 2025?

CPT 77427 has 5.81 total RVUs in 2025, consisting of 3.37 work RVUs, 2.17 practice expense RVUs (both facility and non-facility), and 0.27 malpractice RVUs. These are the same values for both facility and non-facility settings because 77427 is a professional service code without a significant site-of-service differential.