78645 Csf shunt evaluation
Also known as: shunt evaluation, CSF shunt study
Cerebrospinal fluid shunt evaluation performed to assess ventriculoperitoneal or other cerebrospinal fluid shunt function.
In Plain Language
shunt function test; drainage shunt check
Clinical Context
Evaluates ventriculoperitoneal or ventriculoatrial shunt patency and function in patients with hydrocephalus.
RVU Breakdown
| Work RVU | 0.56 |
| Total RVU | 0.56 |
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 0.56, this code ranks in the 34th percentile among Radiology codes — 1.4x below the median (0.81). The highest wRVU in this category is 11.57.
Specialties
Frequently Asked Questions
What is CPT code 78645?
CPT 78645 (Csf shunt evaluation) is a Radiology code. Cerebrospinal fluid shunt evaluation performed to assess ventriculoperitoneal or other cerebrospinal fluid shunt function.
Who uses CPT code 78645?
CPT 78645 is used by Nuclear Medicine, Neurosurgery, Radiology. Evaluates ventriculoperitoneal or ventriculoatrial shunt patency and function in patients with hydrocephalus.
When is CPT 78645 used?
Evaluates ventriculoperitoneal or ventriculoatrial shunt patency and function in patients with hydrocephalus.
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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.