What is meaning of LCD ?

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it is known as a local coverage determination (LCD).

When a contractor or fiscal intermediary makes a ruling as to whether a service or item can be reimbursed,

billers have two types of coverage determinations within Medicare, local and national.

lCD (liquid crystal display) is the technology used for displays in notebook and other smaller computers. Like light-emitting diode (LED) and gas-plasma technologies, LCDs allow displays to be much thinner than cathode ray tube (CRT) technology

Medicare LCDs and NCDs in Medical Coding and Billing. Medical coders

LCDs consume much less power than LED and gas-display displays because they work on the principle of blocking light rather than emitting it.

A VDU is a Visual Display Unit.

An LCD is made with either a passive matrix or an active matrix display display grid. The active matrix LCD is also known as a thin film transistor (TFT) display.

it's the key to how LCD displays turn pixels on and off

The passive matrix LCD has a grid of conductors with pixels located at each intersection in the grid.

A current is sent across two conductors on the grid to control the light for any pixel.

they straighten out again. That may not sound much of a trick,

An active matrix has a transistor located at each pixel intersection, requiring less current to control the luminance of a pixel

For this reason, the current in an active matrix display can be switched on and off more frequently, improving the screen refresh time (your mouse will appear to move more smoothly across the screen, for example).

Some passive matrix LCD's have dual scanning, meaning that they scan the grid twice with current in the same time that it took for one scan in the original technology.

However, active matrix is still a superior technology.

LCD stands for “liquid crystal display” and technically, both LED and LCD TVs are liquid crystal displays.