CurrentBlue KCPolicy POL-PP- 240

Bilateral Procedures — Payment Integrity Compliance

Defines Blue KC's billing and reimbursement rules for procedures performed bilaterally, including modifier usage, payment adjustments, and guidance for professional, facility, and ASC claims across affected lines of business.

Policy Summary

PayerBlue KC

PolicyBilateral Procedures — Payment Integrity Compliance

Policy CodePolicy POL-PP- 240

Change TypeNo material change

Effective DateJun 1, 2023

Next Review DateJun 1, 2026

Key ActionSubmit bilateral procedures on one line with modifier -50 for professional claims unless the CPT descriptor indicates inherent bilateral billing.

SourceLink

POLICY UPDATE CHANGES

No material clinical or coverage changes in this revision.

150%reimbursement for bilateral-eligible codes with bilateral indicator '1' (aggregate payment)

200%reimbursement for bilateral-eligible codes with bilateral indicator '3' when reported with modifier 50

75%contracts using percent-of-billed methodology

One-line with -50professional claim submission format

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Bilateral Procedure Payment Criteria

Bilateral procedure payment criteria

Payment stance and application based on CMS bilateral indicators and billing modifiers:

Follow CMS physician fee schedule bilateral status indicators (0,1,2,3,9) to determine payment adjustments for bilateral procedures.

Blue KC requires bilateral procedures to be submitted on one line appended with the -50 modifier for professional claims unless the CPT descriptor indicates the procedure is inherently bilateral (CMS indicator '2'), in which case the -50 modifier should not be used.

For facility claims, bill the procedure on one line with modifier 50 and one unit; Blue KC will apply payment adjustments per the bilateral indicator rules.

Payment adjustments by CMS bilateral indicator

Indicator '1': Code is eligible for reimbursement at 150% of the single-procedure allowable when reported bilaterally (one side reimbursed at 100% and the other at 50%), not to exceed billed charges.
Indicator '3': When reported with modifier 50, code is eligible for reimbursement at 100% of the allowable amount for each side, totaling 200% of the allowable amount, not to exceed billed charges.
Indicator '2': CPT descriptor specifies the procedure is bilateral; do not append modifier -50.

When other reducible procedure codes are reported on the same date of service, an additional multiple procedure or imaging reduction may or may not be applied to the line paid at 100% depending on primary ranking.

For contracts that reimburse on a percentage-of-billed methodology, bilateral procedures will be reimbursed at 75% of the contracted allowable.

Bilateral Status Indicators and Reimbursement Multipliers

Bilateral status indicatorsmixed

0	150 percent payment adjustment for bilateral procedures does not apply.
1	150 percent payment adjustment for bilateral procedures applies. The procedure code will be eligible for reimbursement at 150% of the allowable amount for a single procedure code, not to exceed billed charges, with one side reimbursed at 100% and the other side reimbursed at 50% of the allowable amount.
2	150 percent payment adjustment for bilateral procedure does not apply. CPT descriptors for some procedures specify that the procedure is bilateral; these codes are designated with indicator '2' and the bilateral modifier should not be used.
3	The usual payment adjustment for bilateral procedures does not apply.
9	Concept does not apply.

Reimbursement multiplier for bilateral indicator '1'

Reimbursement multiplier150% of the single-procedure allowable (one side paid at 100% + other side paid at 50%)

ApplicabilityApplies to procedure codes with CMS bilateral status indicator '1' when reported bilaterally

LimitNot to exceed billed charges

Interaction with multiple procedure reductionWhen other reducible procedure codes are reported same date, an additional multiple procedure/imaging reduction may or may not be applied to the line paid at 100% depending on primary ranking

Claim Submission and Billing Guidance

Billing Rule

Professional claim submission

Submit bilateral procedures on one line with modifier -50 for professional claims. Do not append modifier -50 when the CPT descriptor designates the procedure as bilateral (CMS bilateral indicator '2').

Billing Rule

ASC claim submission

ASCs using CMS methodology should report bilateral procedures either as two lines with RT and LT modifiers or as a single line with '2' in the unit field. ASCs not using CMS methodology should report one line with unit=1 and append modifier 50.

Example (CMS methodology): report CPT 31020 on two lines with RT and LT or with unit=2.
Example (non-CMS methodology): report CPT 31020 on one line with unit=1 and modifier 50 in the first modifier position.

Key Terms

Bilateral procedure — definition

DefinitionA procedure performed on both sides of the body during the same operative session by the same provider on identical anatomic sites (e.g., both knees or both eyes).

Billing indicatorsMay be reported using modifier -50 or using LT/RT modifiers or separate lines per side, unless CPT descriptor indicates inherent bilateral billing (CMS indicator '2')

Typical scenarioSame operative session on right and left sides of the same body part by the same provider

Payment implicationSome bilateral procedures are eligible for payment adjustments (e.g., indicator '1' = 150%; indicator '3' reported with modifier 50 = 200%), subject to billed charge limits