Repeat lab procedure guideline for modifier

Repeat Lab Procedures - Medicaid

Modifier 91 may be utilized to denote a repeat clinical laboratory test performed on the dame date of service for the same recipient. Providers should use modifier 91 instead of modifier 76 for repeat lab procedures

A physician CANNOT bill the following pathology/laboratory procedure codes, however the above collection fee can be billed, if applicable:

82775 Galactose – 1 – phosphate uridyl transferase; quantitative
83498 Hydroxyprogesterone, 17 – d
84030 Phenylalanine (PKU) blood
84437 Thyroxine; total requiring elution (e.g., neonatal

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