MODIFIER 90 Basics Reference (outside) Laboratory: When a laboratory process is conducted by someone other than the treatment or reporting physician or another credible health care professional, the process is recognized by incorporating modifier 90 to the usual procedure number. When lab tests for a patient are conducted by an outside or reference laboratory, a physician … [Read more...] about Guidelines to use Modifier 90
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An overview of Modifier 91
MODIFIER 91 Definition CPT® defines Modifier 91 as a repeat clinical diagnostic laboratory test. It implies when successive lab procedures are conducted on the same patient on the same day to acquire additional test data throughout therapy. You can see why it's critical to include suitable modifiers when billing the same CPT twice or three times on the same day for the same … [Read more...] about An overview of Modifier 91
