References
- Centers for Medicare & Medicaid Services. New healthcare common procedure coding System (HCPCS) modifiers when billing for patient care in clinical research studies. MLN Matters. MM5805. Released Jan. 18, 2008. Available online at: http://www.cms.hhs.gov/MLNMattersArticles/downloads/MM5805.pdf. Last accessed April 10, 2008.
- Centers for Medicare & Medicaid Services. New HCPCS Modifiers when Billing for Patient Care in Clinical Research Studies. Transmittal 1418. Available online at: http://www.cms.hhs.gov/Transmittals/downloads/R1418CP.pdf. Last accessed April 10, 2008.
- Centers for Medicare & Medicaid Services. Use of an 8-digit registry number on clinical trial claims. MLN Matters. MM5790. Released Jan. 18, 2008. Available online at: http://www.cms.hhs.gov/MLNMattersArticles/downloads/MM5790.pdf. Last accessed April 10, 2008.
- Centers for Medicare & Medicaid Services. Requirements for Including an 8-Digit Clinical Trial Number on Claims. Transmittal 310. Available online at: http://www.cms.hhs.gov/Transmittals/downloads/R310OTN.pdf. Last accessed April 10, 2008.