Q What is the best way to code for parvovirus in pregnancy?
A If an IgG-negative gravida who was exposed to the disease seroconverted to IgG positive, assign the code 647.63 (other infectious and parasitic conditions in the mother classifiable elsewhere, but complicating pregnancy, childbirth, or the puerperium; antepartum condition) plus 057.0 to indicate parvovirus. Always list the pregnancy code first.
If an IgG-positive gravida was simply exposed to the virus, use the code V23.89 (other high-risk pregnancy) plus V01.7 (contact with or exposure to other viral diseases).
This article was written by Melanie Witt, RN, CPC, MA, former program manager in the Department of Coding and Nomenclature at ACOG. She is now an independent coding and documentation consultant. Her comments reflect the most commonly accepted interpretations of CPT-4 and ICD-9-CM coding. When in doubt on a coding or billing matter, check with your individual payer.