Where can I find ABN Modifier guidelines for Medicare?
Under the "Info" menu at the top of the page, locate the "PUB 100 - Medicare Guides & Manuals" item. Switch to the "100-04 Medicare Claims Processing Manual" select "Chapter 1-General Billing Requirements" (usually the default chapter), then locate page 178 for a list of the modifiers, scroll further down to Table 6 for descriptions and usage.
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