1. O99 Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

    Use additional code to identify specific condition

    Includes:

    • conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care

    Excludes2

    • when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)
    1. O99.0 Anemia complicating pregnancy, childbirth and the puerperium

      Inclusion term(s):

      • Conditions in D50-D64
      1. O99.01 Anemia complicating pregnancy

        • O99.011 Anemia complicating pregnancy, first trimester
        • O99.012 Anemia complicating pregnancy, second trimester
        • O99.013 Anemia complicating pregnancy, third trimester
        • O99.019 Anemia complicating pregnancy, unspecified trimester
      2. O99.02 Anemia complicating childbirth

      3. O99.03 Anemia complicating the puerperium

    2. O99.1 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium

      Inclusion term(s):

      • Conditions in D65-D89
      1. O99.11 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy

        • O99.111 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, first trimester
        • O99.112 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, second trimester
        • O99.113 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, third trimester
        • O99.119 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, unspecified trimester
      2. O99.12 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating childbirth

      3. O99.13 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating the puerperium

    3. O99.2 Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium

      Inclusion term(s):

      • Conditions in E00-E89
      1. O99.21 Obesity complicating pregnancy, childbirth, and the puerperium

        • O99.210 Obesity complicating pregnancy, unspecified trimester
        • O99.211 Obesity complicating pregnancy, first trimester
        • O99.212 Obesity complicating pregnancy, second trimester
        • O99.213 Obesity complicating pregnancy, third trimester
        • O99.214 Obesity complicating childbirth
        • O99.215 Obesity complicating the puerperium
      2. O99.28 Other endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium

        • O99.280 Endocrine, nutritional and metabolic diseases complicating pregnancy, unspecified trimester
        • O99.281 Endocrine, nutritional and metabolic diseases complicating pregnancy, first trimester
        • O99.282 Endocrine, nutritional and metabolic diseases complicating pregnancy, second trimester
        • O99.283 Endocrine, nutritional and metabolic diseases complicating pregnancy, third trimester
        • O99.284 Endocrine, nutritional and metabolic diseases complicating childbirth
        • O99.285 Endocrine, nutritional and metabolic diseases complicating the puerperium
    4. O99.3 Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium

      1. O99.31 Alcohol use complicating pregnancy, childbirth, and the puerperium

        • O99.310 Alcohol use complicating pregnancy, unspecified trimester
        • O99.311 Alcohol use complicating pregnancy, first trimester
        • O99.312 Alcohol use complicating pregnancy, second trimester
        • O99.313 Alcohol use complicating pregnancy, third trimester
        • O99.314 Alcohol use complicating childbirth
        • O99.315 Alcohol use complicating the puerperium
      2. O99.32 Drug use complicating pregnancy, childbirth, and the puerperium

        • O99.320 Drug use complicating pregnancy, unspecified trimester
        • O99.321 Drug use complicating pregnancy, first trimester
        • O99.322 Drug use complicating pregnancy, second trimester
        • O99.323 Drug use complicating pregnancy, third trimester
        • O99.324 Drug use complicating childbirth
        • O99.325 Drug use complicating the puerperium
      3. O99.33 Tobacco use disorder complicating pregnancy, childbirth, and the puerperium

        Inclusion term(s):

        • Smoking complicating pregnancy, childbirth, and the puerperium
        • O99.330 Smoking (tobacco) complicating pregnancy, unspecified trimester
        • O99.331 Smoking (tobacco) complicating pregnancy, first trimester
        • O99.332 Smoking (tobacco) complicating pregnancy, second trimester
        • O99.333 Smoking (tobacco) complicating pregnancy, third trimester
        • O99.334 Smoking (tobacco) complicating childbirth
        • O99.335 Smoking (tobacco) complicating the puerperium
      4. O99.34 Other mental disorders complicating pregnancy, childbirth, and the puerperium

        Inclusion term(s):

        • Conditions in F01-F09, F20-F52 and F54-F99
        • O99.340 Other mental disorders complicating pregnancy, unspecified trimester
        • O99.341 Other mental disorders complicating pregnancy, first trimester
        • O99.342 Other mental disorders complicating pregnancy, second trimester
        • O99.343 Other mental disorders complicating pregnancy, third trimester
        • O99.344 Other mental disorders complicating childbirth
        • O99.345 Other mental disorders complicating the puerperium
      5. O99.35 Diseases of the nervous system complicating pregnancy, childbirth, and the puerperium

        Inclusion term(s):

        • Conditions in G00-G99
        • O99.350 Diseases of the nervous system complicating pregnancy, unspecified trimester
        • O99.351 Diseases of the nervous system complicating pregnancy, first trimester
        • O99.352 Diseases of the nervous system complicating pregnancy, second trimester
        • O99.353 Diseases of the nervous system complicating pregnancy, third trimester
        • O99.354 Diseases of the nervous system complicating childbirth
        • O99.355 Diseases of the nervous system complicating the puerperium
    5. O99.4 Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium

      Inclusion term(s):

      • Conditions in I00-I99
      1. O99.41 Diseases of the circulatory system complicating pregnancy

        • O99.411 Diseases of the circulatory system complicating pregnancy, first trimester
        • O99.412 Diseases of the circulatory system complicating pregnancy, second trimester
        • O99.413 Diseases of the circulatory system complicating pregnancy, third trimester
        • O99.419 Diseases of the circulatory system complicating pregnancy, unspecified trimester
      2. O99.42 Diseases of the circulatory system complicating childbirth

      3. O99.43 Diseases of the circulatory system complicating the puerperium

    6. O99.5 Diseases of the respiratory system complicating pregnancy, childbirth and the puerperium

      Inclusion term(s):

      • Conditions in J00-J99
      1. O99.51 Diseases of the respiratory system complicating pregnancy

        • O99.511 Diseases of the respiratory system complicating pregnancy, first trimester
        • O99.512 Diseases of the respiratory system complicating pregnancy, second trimester
        • O99.513 Diseases of the respiratory system complicating pregnancy, third trimester
        • O99.519 Diseases of the respiratory system complicating pregnancy, unspecified trimester
      2. O99.52 Diseases of the respiratory system complicating childbirth

      3. O99.53 Diseases of the respiratory system complicating the puerperium

    7. O99.6 Diseases of the digestive system complicating pregnancy, childbirth and the puerperium

      Inclusion term(s):

      • Conditions in K00-K93
      1. O99.61 Diseases of the digestive system complicating pregnancy

        • O99.611 Diseases of the digestive system complicating pregnancy, first trimester
        • O99.612 Diseases of the digestive system complicating pregnancy, second trimester
        • O99.613 Diseases of the digestive system complicating pregnancy, third trimester
        • O99.619 Diseases of the digestive system complicating pregnancy, unspecified trimester
      2. O99.62 Diseases of the digestive system complicating childbirth

      3. O99.63 Diseases of the digestive system complicating the puerperium

    8. O99.7 Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperium

      Inclusion term(s):

      • Conditions in L00-L99
      1. O99.71 Diseases of the skin and subcutaneous tissue complicating pregnancy

        • O99.711 Diseases of the skin and subcutaneous tissue complicating pregnancy, first trimester
        • O99.712 Diseases of the skin and subcutaneous tissue complicating pregnancy, second trimester
        • O99.713 Diseases of the skin and subcutaneous tissue complicating pregnancy, third trimester
        • O99.719 Diseases of the skin and subcutaneous tissue complicating pregnancy, unspecified trimester
      2. O99.72 Diseases of the skin and subcutaneous tissue complicating childbirth

      3. O99.73 Diseases of the skin and subcutaneous tissue complicating the puerperium

    9. O99.8 Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium

      Inclusion term(s):

      • Conditions in D00-D48, H00-H95, M00-N99, and Q00-Q99
      1. O99.81 Abnormal glucose complicating pregnancy, childbirth and the puerperium

        • O99.810 Abnormal glucose complicating pregnancy
        • O99.814 Abnormal glucose complicating childbirth
        • O99.815 Abnormal glucose complicating the puerperium
      2. O99.82 Streptococcus B carrier state complicating pregnancy, childbirth and the puerperium

        • O99.820 Streptococcus B carrier state complicating pregnancy
        • O99.824 Streptococcus B carrier state complicating childbirth
        • O99.825 Streptococcus B carrier state complicating the puerperium
      3. O99.83 Other infection carrier state complicating pregnancy, childbirth and the puerperium

        • O99.830 Other infection carrier state complicating pregnancy
        • O99.834 Other infection carrier state complicating childbirth
        • O99.835 Other infection carrier state complicating the puerperium
      4. O99.84 Bariatric surgery status complicating pregnancy, childbirth and the puerperium

        Inclusion term(s):

        • Gastric banding status complicating pregnancy, childbirth and the puerperium
        • Gastric bypass status for obesity complicating pregnancy, childbirth and the puerperium
        • Obesity surgery status complicating pregnancy, childbirth and the puerperium
        • O99.840 Bariatric surgery status complicating pregnancy, unspecified trimester
        • O99.841 Bariatric surgery status complicating pregnancy, first trimester
        • O99.842 Bariatric surgery status complicating pregnancy, second trimester
        • O99.843 Bariatric surgery status complicating pregnancy, third trimester
        • O99.844 Bariatric surgery status complicating childbirth
        • O99.845 Bariatric surgery status complicating the puerperium
      5. O99.89 Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium

        • O99.891 Other specified diseases and conditions complicating pregnancy
        • O99.892 Other specified diseases and conditions complicating childbirth
        • O99.893 Other specified diseases and conditions complicating puerperium
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.