Bindinglaw

US · guidance

CMS Pub. 100-04, ch. 13, § 70.1

Weekly Radiation Therapy Management (CPT 77419 - 77430)

activein force · 2026-08-25 – presentas-observed

A/B MACs (B) must pay for a physician’s weekly treatment management services under

code 77427. Billing entities must indicate on each claim the number of fractions for

which payment is sought.

A weekly unit of treatment management is equal to five fractions or treatment sessions.

A week for the purpose of making payments under these codes is comprised of five

fractions regardless of the actual time period in which the services are furnished. It is not

necessary that the radiation therapist personally examine the patient during each fraction

for the weekly treatment management code to be payable. Multiple fractions

representing two or more treatment sessions furnished on the same day may be counted

as long as there has been a distinct break in therapy sessions, and the fractions are of the

character usually furnished on different days. If, at the final billing of the treatment

course, there are three or four fractions beyond a multiple of five, those three or four

fractions are paid for as a week. If there are one or two fractions beyond a multiple of

five, payment for these services is considered as having been made through prior

payments.

EXAMPLE: 18 fractions = 4 weekly services

62 fractions = 12 weekly services

8 fractions = 2 weekly services

6 fractions = 1 weekly service

If billings have occurred which indicate that the treatment course has ended (and,

therefore, the number of residual fractions has been determined), but treatments resume,

adjust A/B MAC (B) payments for the additional services consistent with the above

policy.

EXAMPLE: 8 fractions = payment for 2 weeks

2 additional fractions are furnished by the same physician. No additional

Medicare payment is made for the 2 additional fractions.

A. SNF Treatment Management Delivery Services

A SNF may not bill weekly treatment management services for its outpatients (codes

77419, 77420, 77425, 77430, and 77431). Instead, the SNF should bill for radiation

treatment delivery (codes 77401 - 77404, 77406 - 77409, 77411 - 77414, and 77416).

Also, SNFs bill for therapeutic radiology port film (code 77417), which was previously a

part of the weekly services. They enter the number of services in the units field.

History

(Rev. 1, 10-01-03)

Provenance

Source
cms.gov
Retrieved
2026-08-25
Edition
iom-2026-08-25
Content hash
c88604fcdafbb8ec89220ece386301c512bfdc25db878065926d6c2a1ba2807e
View the official source →

The link goes to the issuing authority’s own document — the one we read to produce this record. Where a source publishes whole titles rather than sections, your browser may need a moment to jump to the provision.

Unofficial copy of government-published law, reproduced from official sources with full provenance. Not an official publication; verify against official sources before relying on it in a filing. Records in the 'guidance' corpus, and only that corpus, are sub-regulatory (interpretive guidelines, survey procedures) and are not binding law. Validity bounds follow each jurisdiction's declared temporalBasis.

Coverage · API docs

Bindinglaw

Point-in-time US law with the receipt attached. Source URL, retrieval time, content hash, and validity dates on every answer.

curl api.binding.law/v1/law/coverage

© 2026 binding.law · a Jubal, Inc. productAttorneys and firms never pay. Ever.