Modifier Rules

Modifier Rules

Add, remove, or replace modifiers on claim service lines. Filter by payer and CPT codes. This module replaces the need for hardcoded modifier logic — you can configure any modifier change per payer.

Applies to: Professional (837P), Institutional (837I), Dental (837D)

When to Use This

A payer requires modifier 25 on E/M codes when billed with a procedure
You need to replace modifier 59 with the appropriate X-modifier (XE, XP, XS, XU) per payer
Telehealth claims need modifier GT, 95, or FQ depending on the payer
A payer rejects a specific modifier and you need to remove it
You need to add modifier 26 (Professional Component) for specific CPT codes

Fields

Field	Required	Description
Start Date	Yes	When this rule becomes active
End Date	No	When this rule expires
Payer Number	No	Only apply for a specific payer. Blank = all payers
Action	Yes	Add Modifier (1), Remove Modifier (2), or Replace Modifier (3)
Modifier Value	Yes	The modifier to add, remove, or find (for replace)
Replacement Modifier	Only for Replace	The modifier to replace with (only visible when Action = Replace)
CPT Codes	No	Comma-separated CPT codes. Only apply to service lines with these codes. Blank = all service lines
Modifier Position	No	Auto/Any = first available slot for Add, any matching position for Remove/Replace. Or pick a specific position (1-4)
Notes	No	Your reference notes

Actions Explained

Add — Puts the modifier in the specified position. If “Auto”, finds the first empty modifier slot. Won't overwrite existing modifiers in Auto mode.
Remove — Finds the modifier on the service line and clears it. If position is “Any”, removes it from whichever slot it's in.
Replace — Finds the modifier on the service line and swaps it with the replacement. If position is “Any”, replaces it wherever it's found.

Examples

Example 1: Add Modifier 25 for E/M Codes

Add modifier 25 to all E/M codes for Aetna.

Field	Value
Payer Number	60054
Action	Add Modifier
Modifier Value	25
CPT Codes	99211,99212,99213,99214,99215
Modifier Position	Auto

Example 2: Replace Modifier 59 with XE

Medicare wants modifier 59 replaced with XE (Separate Encounter).

Field	Value
Payer Number	00882
Action	Replace Modifier
Modifier Value	59
Replacement Modifier	XE
Modifier Position	Any

Example 3: Add Telehealth Modifier

Cigna requires modifier 95 on telehealth E/M codes.

Field	Value
Payer Number	62308
Action	Add Modifier
Modifier Value	95
CPT Codes	99211,99212,99213,99214,99215
Modifier Position	Auto

Example 4: Remove Modifier

A payer rejects claims with modifier TC on certain codes.

Field	Value
Payer Number	00621
Action	Remove Modifier
Modifier Value	TC
CPT Codes	80053,80061
Modifier Position	Any

What Happens on the Claim

For each service line (Loop 2400), checks the SV1 segment (Professional/Dental) or SV2 segment (Institutional)
Modifiers are in the procedure code composite element: positions 2-5 correspond to modifiers 1-4
Add: Sets the modifier in the specified or first empty position
Remove: Clears the modifier from the matching position(s)
Replace: Swaps the old modifier with the new one in the matching position(s)
A warning is logged for each service line modified (e.g., “Added modifier 25 on 99213”)
Shows in Applied Validation Modules as “ModifierRuleModule”

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