78122 Whl bld volume determination
Also known as: total blood volume, blood volume determination
Whole blood volume determination performed using nuclear medicine techniques to measure total blood volume components.
In Plain Language
total blood volume measurement
Clinical Context
Comprehensive blood volume assessment determining both plasma and red cell volumes simultaneously. Used in evaluation of polycythemia, anemia, and fluid status.
RVU Breakdown
| Work RVU | 0.44 |
| Total RVU | 0.44 |
Est. Medicare Payment
National estimate based on 2026 CMS PFS Conversion Factor ($33.40). Actual payment varies by locality (GPCI adjustment).
Billing & Documentation
Radiology codes require a written order, clinical indication, and a formal interpretation report. The professional component (modifier -26) and technical component (modifier -TC) may be billed separately.
How This Code Compares
With a work RVU of 0.44, this code ranks in the 25th percentile among Radiology codes — 1.8x below the median (0.81). The highest wRVU in this category is 11.57.
Specialties
Frequently Asked Questions
What is CPT code 78122?
CPT 78122 (Whl bld volume determination) is a Radiology code. Whole blood volume determination performed using nuclear medicine techniques to measure total blood volume components.
Who uses CPT code 78122?
CPT 78122 is used by Nuclear Medicine, Hematology, Radiology. Comprehensive blood volume assessment determining both plasma and red cell volumes simultaneously. Used in evaluation of polycythemia, anemia, and fluid status.
When is CPT 78122 used?
Comprehensive blood volume assessment determining both plasma and red cell volumes simultaneously. Used in evaluation of polycythemia, anemia, and fluid status.
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CPT® is a registered trademark of the American Medical Association. Data sourced from CMS Physician Fee Schedule RVU26A. Descriptions, synonyms, and clinical context are original content by RVU Edge.