# CPT 77066

> Not at a published national rate. CPT 77066 carries status I (not valid) in the Q3 2017 release. Medicare uses a different code to report and pay for this service. Treat the blank amount as unpriced, not as $0.

## 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: Q3 2017 (2017 C)
- Effective: July 1 – September 30, 2017
- Status indicator: I
- Office (non-facility) national allowed amount: not published
- Facility national allowed amount: not published
- Sequestration: not applied

## RVUs and formula

- Work RVU: not published
- Office (non-facility) practice expense RVU: not published
- Facility practice expense RVU: not published
- Malpractice RVU: not published
- Conversion factor: 35.8887
- Formula: `(work_rvu × work_gpci + pe_rvu × pe_gpci + mp_rvu × mp_gpci) × conversion_factor`

## Source and citation

- Source: Physician relative value file (Q3 2017)
- CMS file: https://www.cms.gov/medicare/medicare-fee-for-service-payment/physicianfeesched/downloads/rvu17c.zip
- Parsed file: PPRRVU17_JULY_V0503.csv, row 12,656
- Canonical page: https://localishealth.com/cpt/77066/2017/A
- Release-specific citation URL: https://localishealth.com/cpt/77066/2017/C
- Last significant update: 2026-08-04T03:07:49+00:00