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A word or group of words that describes or limits a verb, noun, adjective, or adverb. Modifiers applied to nouns are adjectives. Modifiers applied to verbs or adjectives are adverbs. Those that are applied to adverbs themselves are also called adverbs.
modifier is an important part of avoiding fraud and abuse or non-compliance issues. Some can be. easily misused and the modifier grid below should provide guidance on some of the most commonly. billed modifiers. There are two levels of modifiers: Level 1 (CPT) and Level II (CMS, also known as HCPCS). Level I (CPT) Modifiers. Level I Modifiers are two numeric digits. The American Medical Association (AMA) updates these annually.