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Columbia University Billing Compliance Hotline 212-305-7739 (5-7739) The Columbia University Billing Compliance Hotline's internal connection recently changed to "5", consistent with the improved telecommunications systems. The hotline is available to convey confidential concerns related to professional billing. All information will be held in strictest confidence. The hotline is available 24 hours/day, 7days per week. For routine billing concerns, please contact the Office for Billing Compliance at 5- 3842, 5-0572, or 5-1834.
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