# CPT 77300

> Medicare paid $68.76 for CPT 77300 in the office (non-facility) setting and $68.76 in a facility under the Q1 2018 Physician Fee Schedule, effective January 2018. These are the national allowed amounts before the ~2% sequestration cut and before locality (GPCI) adjustment. This is a 1.4% increase from the previous quarter.

## What it is

The physics calculation that turns a treatment plan into actual machine settings for one beam or treatment area: working out how long the beam must run, and how much dose reaches a given depth or point, accounting for the beam energy, field size, distance, and any wedges or blocks in the path. A physicist or dosimetrist performs it and the radiation oncologist reviews and signs off. It is the routine per-calculation unit of radiation physics work, distinct from the physician planning that precedes it.

## Selected release

- Release: Q1 2018 (2018 A)
- Effective: January 1 – March 31, 2018
- Status indicator: A
- Office (non-facility) national allowed amount: $68.76
- Facility national allowed amount: $68.76
- Sequestration: not applied

## RVUs and formula

- Work RVU: 0.62
- Office (non-facility) practice expense RVU: 1.25
- Facility practice expense RVU: 1.25
- Malpractice RVU: 0.04
- Conversion factor: 35.9996
- Formula: `(work_rvu × work_gpci + pe_rvu × pe_gpci + mp_rvu × mp_gpci) × conversion_factor`

## Source and citation

- Source: Physician relative value file (Q1 2018)
- CMS file: https://www.cms.gov/medicare/medicare-fee-for-service-payment/physicianfeesched/downloads/rvu18ar1.zip
- Parsed file: PPRRVU18_JAN.csv, row 12,824
- Canonical page: https://localishealth.com/cpt/77300/2018/A
- Release-specific citation URL: https://localishealth.com/cpt/77300/2018/A
- Last significant update: 2026-08-04T03:08:09+00:00