X-ray exam of lower leg
CPT code 73590 covers an X-ray examination of the lower leg, which includes the tibia and fibula bones between the knee and ankle. This is a standard diagnostic imaging test used to detect fractures, infections, or other abnormalities in the lower leg.
This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.
RVU breakdown
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
NCCI bundling edits
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Billing tips
Always append RT or LT modifier to specify laterality when performing unilateral lower leg X-rays
Impact: Prevents denials for missing anatomical information; some payers require laterality modifiers or will deny the claim
Verify the minimum number of views required by the payer; Medicare accepts 73590 for 2 or more views, while single view is coded differently (73592)
Impact: Using incorrect code for single view vs. multiple views can result in overpayment/underpayment or denial
Split billing between 26 and TC modifiers appropriately based on your practice setting to maximize compliant reimbursement
Impact: Incorrect component billing can lead to overpayment audits or underpayment; facility settings should use TC, radiologists use 26
Document the specific clinical indication (trauma, pain, infection suspicion) in the order and interpretation report
Impact: Lack of medical necessity documentation is a top denial reason; strong documentation prevents approximately 30-40% of denials
When billing bilateral studies, submit 73590-RT and 73590-LT separately rather than using modifier 50
Impact: Many payers prefer separate line items with laterality modifiers; improves clean claim rate by 15-20%
Ensure the date of service matches the date the X-ray was taken, not the date of interpretation, when billing global or TC
Impact: Date discrepancies cause processing delays and potential denials requiring resubmission
Common denials
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