Health data standards and systems

In coding a caesarean section that was complicated by pelvic adhesions that required division, I was surprised to see that the code I had to use with N73.6 Female pelvic peritoneal adhesions from the obstetric chapter is O23.5 Infections of the genital tract in pregnancy - using the index look up 'Pregnancy, complicated by, N70-N73'.

Is this correct or an indexing error?

As adhesions come under the category of inflammatory diseases as part of N70-N77 Inflammatory diseases of female pelvic organs, VICC considers it is correct to assign O23.5 Infections of the genital tract in pregnancy for the scenario cited.