Modifiers are two-character suffixes (alpha and/or numeric) that are attached to a procedure code. CPT modifiers are defined by the American Medical Association (AMA). HCPCS Level II modifiers are. defined by the Centers for Medicare and Medicaid Services (CMS).
1 Most desktop computers do not include a monitor. 2  See: How Much Does a Computer Monitor Cost. 3  While most desktops include at least a basic mouse and keyboard, some users prefer to upgrade. 4  A wireless keyboard costs from about $20 to over $200, a wireless mouse from about $20 to $100 or more. For those home office and general-purpose users with limited space, small form or all-in-one desktop computers cost from $1,100 to $2,100. 2  An all-in-one desktop unit hides the processor, memory and hard drive either in the base or behind the integrated flat-screen monitor.
IBM's 1990 PS/2 computers, which used the brand new 486 processor, 4 MB RAM, XGA graphics, and an 80-320 MB hard drive, cost between $10,000 and $15,000. typical DOS PC cost around $2000. It offered a 386/16 MHz processor with 2 MB RAM, 256 color VGA graphics, and an optional mouse for use with the brand new Windows 3.0.