CPT® Code 84466 is used to report the quantitative measurement of transferrin in blood. Transferrin is a protein produced by the liver that binds and transports iron throughout the body. Measuring transferrin levels helps providers evaluate iron metabolism, nutritional status, liver function, and various forms of anemia.
This test is commonly ordered as part of a comprehensive iron studies panel to assess iron deficiency, iron overload, and other disorders affecting iron transport.
This code represents the laboratory assay only, not specimen collection or interpretation services, which may be reported separately when appropriate.
Key Facts About CPT® 84466
- Service type: Laboratory test
- Test: Transferrin, quantitative
- Specimen type: Serum or plasma
- Test purpose: Evaluate iron transport and metabolism
- Provider type: Laboratories, physicians, and qualified healthcare professionals
Common clinical indications:
- Evaluation of iron deficiency anemia
- Assessment of iron overload disorders
- Investigation of nutritional deficiencies
- Evaluation of chronic liver disease
- Monitoring disorders affecting iron metabolism
When to Use CPT® 84466
CPT 84466 is appropriate when:
- Measuring transferrin levels to evaluate iron transport and metabolism
- Investigating suspected iron deficiency or iron overload
- Assessing nutritional status or liver function
- Monitoring patients with chronic conditions affecting iron metabolism
Examples:
- Evaluating a patient with suspected iron deficiency anemia
- Assessing iron status in a patient with chronic liver disease
- Monitoring iron metabolism in a patient with chronic inflammatory conditions
- Ordering transferrin as part of a complete iron studies panel
Documentation Requirements
To support CPT 84466 billing, documentation should include:
- Patient identifiers and date of service
- Clinical indication for testing
- Specimen type (serum or plasma)
- Test performed (transferrin measurement)
- Test result and date reported
- Ordering provider information
Clear documentation supports medical necessity, accurate billing, and continuity of care.
Reimbursement and Coding Considerations
- CPT 84466 is generally covered when medically necessary
- Diagnosis coding should support anemia, iron metabolism disorders, liver disease, or nutritional deficiencies
- Frequently performed alongside serum iron, ferritin, total iron-binding capacity (TIBC), and transferrin saturation calculations
- Specimen collection may be billed separately if permitted by the payer
- Frequency limitations may apply based on the patient's condition and payer policy
Always verify payer-specific laboratory billing requirements before submitting claims.
How OptiMantra Supports Iron Studies and Laboratory Testing
OptiMantra’s integrated EMR and practice management system streamlines documentation and billing for CPT 84466:
With OptiMantra, providers can:
- Order transferrin and related iron studies within the patient chart
- Track iron markers and laboratory values over time
- Link results to diagnoses, treatment plans, and follow-up care
- Maintain organized laboratory documentation that supports billing compliance and audit preparedness
- Integrate laboratory workflows with chronic disease management and nutritional care
- Monitor longitudinal trends to support informed clinical decision-making
By centralizing laboratory workflows, OptiMantra helps practices improve efficiency, ensure compliance, and optimize reimbursement.
Try OptiMantra for free here!
Disclaimer: CPT® codes are maintained by the American Medical Association. This guide is for informational purposes only and does not replace official coding guidelines or payer policies.
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