X178 – Mammogram - bilateral
OHIP Laboratory Code — DIAGNOSTIC RADIOLOGY · Schedule of Benefits
X178 is a bilateral mammogram performed using dedicated equipment. It is intended for individuals who do not present with signs or symptoms of breast disease, but where the mammogram is requested as a screening or surveillance tool due to identified risk factors, in accordance-with established clinical practice guidelines. This service is distinct from diagnostic mammograms for symptomatic patients (e.g., X185). The service has two components as listed in the Schedule of Benefits: a professional component (P) for interpretation and a hospital technical component (H) for the procedure itself. See also X172 for the unilateral equivalent.
When to Use
- Use X178 for asymptomatic patients undergoing routine screening mammography based on established risk factors or age-based guidelines.
- Use this code for surveillance mammography in patients with a personal history of breast cancer who are currently asymptomatic.
- Use X178 when the clinical intent is screening, distinguishing it from X185 which is reserved for patients presenting with specific breast symptoms or findings.
Common Pitfalls
- Billing X178 for a patient presenting with a palpable lump or focal pain, which requires the diagnostic code X185 instead.
- Submitting X178 on the same day as X169 or X417, which will result in an automatic rejection due to billing restrictions.
- Failing to document the specific risk factor or guideline justification that necessitates the screening, which is a requirement for audit compliance.
Billing Tips
- If a patient requires an additional mammogram modality on the same day due to clinical necessity, submit the claim with the manual review indicator to avoid rejection.
- Ensure the referral source is a physician, nurse practitioner, or oral maxillofacial surgeon, as claims lacking a valid referral source are ineligible for payment.
Effective: April 1, 2025
D. Diagnostic Radiology
DIAGNOSTIC RADIOLOGY
Diagnostic
Diagnostic Radiology
The sole reason for the request for a mammogram must be for an individual with identified risk factors in accordance with clinical practice guidelines.
The medical record must establish that an insured service was provided, the service for which the account is submitted is the service that was rendered, and the service was medically necessary.
For the technical component, the physician must maintain documentation that describes the process by which the physician monitors quality assurance in accordance with professional standards.
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