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

Codes under O99 (Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.

Code	Description	Billable
O99.0	Anemia complicating pregnancy, childbirth and the puerperium	—
O99.01	Anemia complicating pregnancy	—
O99.1	Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium	—
O99.02	Anemia complicating childbirth	✓
O99.2	Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium	—
O99.03	Anemia complicating the puerperium	✓
O99.3	Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium	—
O99.4	Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium	—
O99.5	Diseases of the respiratory system complicating pregnancy, childbirth and the puerperium	—
O99.6	Diseases of the digestive system complicating pregnancy, childbirth and the puerperium	—
O99.7	Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperium	—
O99.8	Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium	—
O99.011	Anemia complicating pregnancy, first trimester	✓
O99.11	Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy	—
O99.012	Anemia complicating pregnancy, second trimester	✓
O99.12	Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating childbirth	✓
O99.013	Anemia complicating pregnancy, third trimester	✓
O99.13	Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating the puerperium	✓
O99.019	Anemia complicating pregnancy, unspecified trimester	✓
O99.21	Obesity complicating pregnancy, childbirth, and the puerperium	—
O99.28	Other endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium	—
O99.31	Alcohol use complicating pregnancy, childbirth, and the puerperium	—
O99.32	Drug use complicating pregnancy, childbirth, and the puerperium	—
O99.33	Tobacco use disorder complicating pregnancy, childbirth, and the puerperium	—
O99.34	Other mental disorders complicating pregnancy, childbirth, and the puerperium	—
O99.35	Diseases of the nervous system complicating pregnancy, childbirth, and the puerperium	—
O99.41	Diseases of the circulatory system complicating pregnancy	—
O99.42	Diseases of the circulatory system complicating childbirth	✓
O99.43	Diseases of the circulatory system complicating the puerperium	✓
O99.51	Diseases of the respiratory system complicating pregnancy	—
O99.52	Diseases of the respiratory system complicating childbirth	✓
O99.53	Diseases of the respiratory system complicating the puerperium	✓
O99.61	Diseases of the digestive system complicating pregnancy	—
O99.62	Diseases of the digestive system complicating childbirth	✓
O99.63	Diseases of the digestive system complicating the puerperium	✓
O99.71	Diseases of the skin and subcutaneous tissue complicating pregnancy	—
O99.72	Diseases of the skin and subcutaneous tissue complicating childbirth	✓
O99.73	Diseases of the skin and subcutaneous tissue complicating the puerperium	✓
O99.81	Abnormal glucose complicating pregnancy, childbirth and the puerperium	—
O99.82	Streptococcus B carrier state complicating pregnancy, childbirth and the puerperium	—
O99.83	Other infection carrier state complicating pregnancy, childbirth and the puerperium	—
O99.84	Bariatric surgery status complicating pregnancy, childbirth and the puerperium	—
O99.89	Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium	—
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	✓
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	✓
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	✓
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	✓
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	✓
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	✓
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	✓
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	✓
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	✓
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	✓
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	✓
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	✓
O99.810	Abnormal glucose complicating pregnancy	✓
O99.814	Abnormal glucose complicating childbirth	✓
O99.815	Abnormal glucose complicating 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	✓
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	✓
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	✓
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	✓

More free billing tools: all ICD-10 categories · ICD-10 search · denial codes · Medicare fees

Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.

Code the diagnosis right