# CPT 77066

> Medicare paid $166.09 for CPT 77066 in the office (non-facility) setting and $166.09 in a facility under the Q2 2021 Physician Fee Schedule, effective April 2021. These are the national allowed amounts before the ~2% sequestration cut and before locality (GPCI) adjustment. This price has been unchanged since Q1 2021, when it decreased 3.3%.

## What it is

The same problem-driven mammogram as the single-breast study, but covering both sides. It is used when the clinical question involves both breasts, when a comparison of the two sides is needed, or when the patient has a history that calls for imaging both. Computer-aided detection is included when applied. Unlike a screening mammogram, this exam is prompted by a symptom or an earlier abnormal finding.

## Selected release

- Release: Q2 2021 (2021 B)
- Effective: April 1 – June 30, 2021
- Status indicator: A
- Office (non-facility) national allowed amount: $166.09
- Facility national allowed amount: $166.09
- Sequestration: not applied

## RVUs and formula

- Work RVU: 1.00
- Office (non-facility) practice expense RVU: 3.70
- Facility practice expense RVU: 3.70
- Malpractice RVU: 0.06
- Conversion factor: 34.8931
- Formula: `(work_rvu × work_gpci + pe_rvu × pe_gpci + mp_rvu × mp_gpci) × conversion_factor`

## Source and citation

- Source: Physician relative value file (Q2 2021)
- CMS file: https://www.cms.gov/files/zip/rvu21b-updated-03022021.zip
- Parsed file: PPRRVU21_APR.csv, row 13,306
- Canonical page: https://localishealth.com/cpt/77066/2021/A
- Release-specific citation URL: https://localishealth.com/cpt/77066/2021/B
- Last significant update: 2026-08-04T03:10:33+00:00