CPT code 77066: Diagnostic mammogram, bilateral, including CAD2026 Medicare rate & RVUs in Connecticut

In Connecticut, Medicare pays $167.56 for 77066 in the office.

Check a contract rate as a % of Medicare · 77066 nationwide

Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.

What 77066 covers

This service covers diagnostic mammographic imaging of both breasts, with computer-aided detection included when performed. It is commonly used to evaluate symptoms such as a palpable breast lump or nipple discharge, investigate a finding on a screening study, or assess a known breast abnormality. A radiologist interprets the images, typically in a breast imaging department, hospital, or outpatient imaging center.

Select this code when the diagnostic examination includes both breasts; use the unilateral code when only one breast is examined. The report should support the diagnostic reason and identify the bilateral study and its interpretation. CMS recognizes separately priced professional and technical components: modifier 26 identifies interpretation, modifier TC identifies equipment and staff, and no modifier represents the global service. The code is already priced bilaterally, so modifier 50 does not increase payment.

This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.

How Connecticut compares for 77066

Across 109 of 109 payment localities, the office rate for 77066 runs from $138.55 in Arkansas to $213.08 in San Benito County, CA. Connecticut pays $167.56. The RVUs are the same everywhere; the geographic indexes change the dollars.

Every other payment area

77066 rates by state

Office rate range in each state. Select a state to see its payment localities.

See 77066 in every payment locality

How the 77066 rate is calculated

Each of 77066’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.

Payment rules and modifiers for 77066

The CMS indicators that decide how 77066 is paid alongside other services.

What modifiers do to the payment

When to use modifier 26

Codes related to 77066

Related codes aren’t interchangeable: bill the code that matches the service performed.

How 77066 has changed in Connecticut

Price 77066 for an earlier date of service

Where the Connecticut rate applies

Connecticut is a Medicare payment area, not a city. Our Census mapping connects it to 215 cities and communities in Connecticut. Some span more than one payment area; confirm with the service ZIP.

• Ansonia
• Ball Pond
• Baltic
• Bantam
• Bethel
• Bethlehem Village
• Bigelow Corners
• Blue Hills

Browse all communities in Connecticut

Where these rates come from

FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.

CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027

Open CMS sourceHow we calculate rates