O99 Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperiumNon-billable header with 9 child codes.
O99.0 Anemia complicating pregnancy, childbirth and the puerperiumO99.1 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperiumO99.2 Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperiumO99.3 Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperiumO99.4 Diseases of the circulatory system complicating pregnancy, childbirth and the puerperiumO99.5 Diseases of the respiratory system complicating pregnancy, childbirth and the puerperiumO99.6 Diseases of the digestive system complicating pregnancy, childbirth and the puerperiumO99.7 Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperiumO99.8 Other specified diseases and conditions complicating pregnancy, childbirth and the puerperiumO99 Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium (this code)O99.0 Anemia complicating pregnancy, childbirth and the puerperiumO99.01 Anemia complicating pregnancyO99.011 Anemia complicating pregnancy, first trimesterO99.012 Anemia complicating pregnancy, second trimesterO99.013 Anemia complicating pregnancy, third trimester