Screening Mammogram

What it is

The defining feature of this code is not the machine or the pictures — it is that nothing is wrong. A screening mammogram is performed on someone with no breast symptoms and no known abnormality, using a standard set of views of both breasts. The point is to catch changes years before they could be felt by a patient or found by an examining hand.

The moment there is something to investigate — a lump, a change in the skin, nipple discharge, or an area flagged on a previous screening — the study becomes a diagnostic mammogram, with extra and differently angled views tailored to that spot. That is a separate code and, for most insurance plans, a separate set of cost-sharing rules. The distinction is worth understanding before the appointment, because a screening study that finds something can lead to a callback visit billed as diagnostic, and patients are often surprised that the second visit is not treated the same way as the first.

Why it is done

• To look for breast cancer in people with no symptoms, at a stage where it is too small to feel
• To create a comparison image, so that future mammograms can be read against a known baseline
• To detect small clusters of calcification, which can be an early sign and are not detectable any other way
• To provide a routine check for people whose personal or family history places them in a higher-risk group

What to expect

You undress from the waist up and are asked not to wear deodorant, powder or lotion on the day, because particles in them can show up on the images and be mistaken for calcifications. A technologist positions one breast at a time on a plate and a clear paddle presses down firmly. That compression is uncomfortable and briefly can be painful, and it is not optional: it spreads the tissue so less of it overlaps, and it allows a lower radiation dose. Two views are taken of each breast, with a held breath for each. The appointment takes about twenty minutes. A radiologist reads the images afterward, so results come by letter, portal or phone rather than on the day, and being called back for more views is common and usually turns out to be nothing.

Questions worth asking

• Ask whether the study is being ordered and coded as screening or diagnostic. Most plans cover screening without cost-sharing and apply a deductible or copay to diagnostic.
• If you are called back for additional views, ask before that visit how it will be coded — the callback is usually diagnostic even though the original was not.
• Ask whether the facility uses tomosynthesis, the three-dimensional technique. It is billed with an additional code, and coverage for it varies by plan.
• Confirm whether the radiologist's reading is included in the quoted price or billed separately by another group.
• If an ultrasound is added at the same visit because of dense tissue or an unclear area, that is its own code. Ask whether it is anticipated and what it costs.