ICD-10-CM category
O99 Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
O99 is a category, not a billable code. Report one of the 96 complete codes below.
O99.0…
6 codes
O99.1…
6 codes
- O99.111Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, first trimester
- O99.112Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, second trimester
- O99.113Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, third trimester
- O99.119Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, unspecified trimester
- O99.12Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating childbirth
- O99.13Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating the puerperium
O99.2…
12 codes
- O99.210Obesity complicating pregnancy, unspecified trimester
- O99.211Obesity complicating pregnancy, first trimester
- O99.212Obesity complicating pregnancy, second trimester
- O99.213Obesity complicating pregnancy, third trimester
- O99.214Obesity complicating childbirth
- O99.215Obesity complicating the puerperium
- O99.280Endocrine, nutritional and metabolic diseases complicating pregnancy, unspecified trimester
- O99.281Endocrine, nutritional and metabolic diseases complicating pregnancy, first trimester
- O99.282Endocrine, nutritional and metabolic diseases complicating pregnancy, second trimester
- O99.283Endocrine, nutritional and metabolic diseases complicating pregnancy, third trimester
- O99.284Endocrine, nutritional and metabolic diseases complicating childbirth
- O99.285Endocrine, nutritional and metabolic diseases complicating the puerperium
O99.3…
30 codes
- O99.310Alcohol use complicating pregnancy, unspecified trimester
- O99.311Alcohol use complicating pregnancy, first trimester
- O99.312Alcohol use complicating pregnancy, second trimester
- O99.313Alcohol use complicating pregnancy, third trimester
- O99.314Alcohol use complicating childbirth
- O99.315Alcohol use complicating the puerperium
- O99.320Drug use complicating pregnancy, unspecified trimester
- O99.321Drug use complicating pregnancy, first trimester
- O99.322Drug use complicating pregnancy, second trimester
- O99.323Drug use complicating pregnancy, third trimester
- O99.324Drug use complicating childbirth
- O99.325Drug use complicating the puerperium
- O99.330Smoking (tobacco) complicating pregnancy, unspecified trimester
- O99.331Smoking (tobacco) complicating pregnancy, first trimester
- O99.332Smoking (tobacco) complicating pregnancy, second trimester
- O99.333Smoking (tobacco) complicating pregnancy, third trimester
- O99.334Smoking (tobacco) complicating childbirth
- O99.335Smoking (tobacco) complicating the puerperium
- O99.340Other mental disorders complicating pregnancy, unspecified trimester
- O99.341Other mental disorders complicating pregnancy, first trimester
- O99.342Other mental disorders complicating pregnancy, second trimester
- O99.343Other mental disorders complicating pregnancy, third trimester
- O99.344Other mental disorders complicating childbirth
- O99.345Other mental disorders complicating the puerperium
- O99.350Diseases of the nervous system complicating pregnancy, unspecified trimester
- O99.351Diseases of the nervous system complicating pregnancy, first trimester
- O99.352Diseases of the nervous system complicating pregnancy, second trimester
- O99.353Diseases of the nervous system complicating pregnancy, third trimester
- O99.354Diseases of the nervous system complicating childbirth
- O99.355Diseases of the nervous system complicating the puerperium
O99.4…
6 codes
- O99.411Diseases of the circulatory system complicating pregnancy, first trimester
- O99.412Diseases of the circulatory system complicating pregnancy, second trimester
- O99.413Diseases of the circulatory system complicating pregnancy, third trimester
- O99.419Diseases of the circulatory system complicating pregnancy, unspecified trimester
- O99.42Diseases of the circulatory system complicating childbirth
- O99.43Diseases of the circulatory system complicating the puerperium
O99.5…
6 codes
- O99.511Diseases of the respiratory system complicating pregnancy, first trimester
- O99.512Diseases of the respiratory system complicating pregnancy, second trimester
- O99.513Diseases of the respiratory system complicating pregnancy, third trimester
- O99.519Diseases of the respiratory system complicating pregnancy, unspecified trimester
- O99.52Diseases of the respiratory system complicating childbirth
- O99.53Diseases of the respiratory system complicating the puerperium
O99.6…
6 codes
- O99.611Diseases of the digestive system complicating pregnancy, first trimester
- O99.612Diseases of the digestive system complicating pregnancy, second trimester
- O99.613Diseases of the digestive system complicating pregnancy, third trimester
- O99.619Diseases of the digestive system complicating pregnancy, unspecified trimester
- O99.62Diseases of the digestive system complicating childbirth
- O99.63Diseases of the digestive system complicating the puerperium
O99.7…
6 codes
- O99.711Diseases of the skin and subcutaneous tissue complicating pregnancy, first trimester
- O99.712Diseases of the skin and subcutaneous tissue complicating pregnancy, second trimester
- O99.713Diseases of the skin and subcutaneous tissue complicating pregnancy, third trimester
- O99.719Diseases of the skin and subcutaneous tissue complicating pregnancy, unspecified trimester
- O99.72Diseases of the skin and subcutaneous tissue complicating childbirth
- O99.73Diseases of the skin and subcutaneous tissue complicating the puerperium
O99.8…
18 codes
- O99.810Abnormal glucose complicating pregnancy
- O99.814Abnormal glucose complicating childbirth
- O99.815Abnormal glucose complicating the puerperium
- O99.820Streptococcus B carrier state complicating pregnancy
- O99.824Streptococcus B carrier state complicating childbirth
- O99.825Streptococcus B carrier state complicating the puerperium
- O99.830Other infection carrier state complicating pregnancy
- O99.834Other infection carrier state complicating childbirth
- O99.835Other infection carrier state complicating the puerperium
- O99.840Bariatric surgery status complicating pregnancy, unspecified trimester
- O99.841Bariatric surgery status complicating pregnancy, first trimester
- O99.842Bariatric surgery status complicating pregnancy, second trimester
- O99.843Bariatric surgery status complicating pregnancy, third trimester
- O99.844Bariatric surgery status complicating childbirth
- O99.845Bariatric surgery status complicating the puerperium
- O99.891Other specified diseases and conditions complicating pregnancy
- O99.892Other specified diseases and conditions complicating childbirth
- O99.893Other specified diseases and conditions complicating puerperium
Outside the US? O99 in the international WHO ICD-10 lists its inclusion and exclusion notes.
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ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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