Complete Modifier Guide Structure

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Part 1 – Evaluation & Management (E/M) Modifiers

• Modifier 25
• Modifier 24
• Modifier 27
• Modifier 32
• Modifier 33
• Modifier 57

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Part 2 – Surgical Modifiers

• Modifier 50
• Modifier 51
• Modifier 52
• Modifier 53
• Modifier 54
• Modifier 55
• Modifier 56
• Modifier 58
• Modifier 59

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Part 3 – XE, XP, XS, XU Modifiers

• XE
• XP
• XS
• XU

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Part 4 – Procedure Modifiers

• Modifier 62
• Modifier 63
• Modifier 66
• Modifier 73
• Modifier 74
• Modifier 76
• Modifier 77
• Modifier 78
• Modifier 79

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Part 5 – Assistant Surgeon Modifiers

• Modifier 80
• Modifier 81
• Modifier 82
• Modifier AS

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Part 6 – Laboratory & Diagnostic Modifiers

• Modifier 90
• Modifier 91
• Modifier 92

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Part 7 – Repeat & Reference Laboratory Modifiers

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Part 8 – HCPCS Professional Modifiers

• Modifier TC
• Modifier 26

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Part 9 – Anesthesia Modifiers

• AA
• AD
• QK
• QX
• QY
• QZ
• GC
• GY
• GZ

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Part 10 – Ambulance Modifiers

• D
• E
• G
• H
• I
• J
• N
• P
• R
• S
• X

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Part 11 – Ambulance Origin & Destination Modifiers

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Part 12 – Durable Medical Equipment (DME) Modifiers

• NU
• RR
• UE
• KH
• KI
• KJ
• KX
• GA
• GX
• GY
• GZ
• EY

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Part 13 – Therapy Modifiers

• GP
• GO
• GN
• CQ
• CO

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Part 14 – Telehealth Modifiers

• 95
• GT
• GQ
• FQ
• FR

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Part 15 – Medicare Special Modifiers

• QW
• Q6
• QJ
• Q0
• Q1

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Part 16 – Dentistry Modifiers

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Part 17 – Ambulatory Surgery Center Modifiers

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Part 18 – National Correct Coding Initiative (NCCI) Modifiers

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Part 19 – Informational Modifiers

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Part 20 – Rarely Used HCPCS Modifiers