ICD-10-CM O99: Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

ICD-10-CM Diagnosis Code (2025)

Official Description for O99

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

Coding Notes & Guidelines for O99

Includes Notes

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

Excludes1: Not Coded Here
  • anemia arising in the puerperium (O90.81)
  • postpartum anemia NOS (O90.81)
Excludes1: Not Coded Here

postpartum anemia not pre-existing prior to delivery (O90.81)

Excludes1: Not Coded Here

hemorrhage with coagulation defects (O45.-, O46.0-, O67.0, O72.3)

Excludes1: Not Coded Here

peripartum cardiomyopathy (O90.3)

Excludes1: Not Coded Here

gestational diabetes (O24.4-)

Excludes1: Not Coded Here

Carrier of streptococcus group B (GBS) in a nonpregnant woman (Z22.330)

Excludes2: Not Included Here

when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)

Excludes2: Not Included Here
  • diabetes mellitus (O24.-)
  • malnutrition (O25.-)
  • postpartum thyroiditis (O90.5)
Excludes2: Not Included Here
  • postpartum mood disturbance (O90.6)
  • postnatal psychosis (F53.1)
  • puerperal psychosis (F53.1)
Excludes2: Not Included Here

pregnancy related peripheral neuritis (O26.8-)

Excludes2: Not Included Here
  • hypertensive disorders (O10-O16)
  • obstetric embolism (O88.-)
  • venous complications and cerebrovenous sinus thrombosis in labor, childbirth and the puerperium (O87.-)
  • venous complications and cerebrovenous sinus thrombosis in pregnancy (O22.-)
Excludes2: Not Included Here
  • hemorrhoids in pregnancy (O22.4-)
  • liver and biliary tract disorders in pregnancy, childbirth and the puerperium (O26.6-)
Excludes2: Not Included Here
  • herpes gestationis (O26.4)
  • pruritic urticarial papules and plaques of pregnancy (PUPPP) (O26.86)
Excludes2: Not Included Here
  • genitourinary infections in pregnancy (O23.-)
  • infection of genitourinary tract following delivery (O86.1-O86.4)
  • malignant neoplasm complicating pregnancy, childbirth and the puerperium (O9A.1-)
  • maternal care for known or suspected abnormality of maternal pelvic organs (O34.-)
  • postpartum acute kidney failure (O90.49)
  • traumatic injuries in pregnancy (O9A.2-)
Use Additional Code

code to identify specific condition

Use Additional Code

code to identify the type of obesity (E66.-)

Use Additional Code

code(s) from F10 to identify manifestations of the alcohol use

Use Additional Code

code(s) from F11-F16 and F18-F19 to identify manifestations of the drug use

Use Additional Code

code from category F17 to identify type of tobacco nicotine dependence

Use Additional Code

code to identify condition

Use Additional Code

code to identify the carrier state (Z22.-)

Inclusion Terms

Conditions in D50-D64

Inclusion Terms

Conditions in D65-D89

Inclusion Terms

Conditions in E00-E89

Inclusion Terms

Smoking complicating pregnancy, childbirth, and the puerperium

Inclusion Terms

Conditions in F01-F09, F20-F52 and F54-F99

Inclusion Terms

Conditions in G00-G99

Inclusion Terms

Conditions in I00-I99

Inclusion Terms

Conditions in J00-J99

Inclusion Terms

Conditions in K00-K93

Inclusion Terms

Conditions in L00-L99

Inclusion Terms

Conditions in D00-D48, H00-H95, M00-N99, and Q00-Q99

Inclusion Terms
  • 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

Child Codes (More Specific Codes for O99):

O99.0 - Anemia complicating pregnancy, childbirth and the puerperium 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 O99.02 - Anemia complicating childbirth O99.03 - Anemia complicating the puerperium O99.1 - Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium O99.11 - 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 O99.12 - Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating childbirth O99.13 - Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating the puerperium O99.2 - Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium 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 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 O99.3 - Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium 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 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 O99.33 - Tobacco use disorder 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 O99.34 - Other mental disorders complicating pregnancy, childbirth, and 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 O99.35 - Diseases of the nervous system complicating pregnancy, childbirth, and 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 O99.4 - Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium 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 O99.42 - Diseases of the circulatory system complicating childbirth O99.43 - Diseases of the circulatory system complicating the puerperium O99.5 - Diseases of the respiratory system complicating pregnancy, childbirth and the puerperium 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 O99.52 - Diseases of the respiratory system complicating childbirth O99.53 - Diseases of the respiratory system complicating the puerperium O99.6 - Diseases of the digestive system complicating pregnancy, childbirth and the puerperium 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 O99.62 - Diseases of the digestive system complicating childbirth O99.63 - Diseases of the digestive system complicating the puerperium O99.7 - Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperium 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 O99.72 - Diseases of the skin and subcutaneous tissue complicating childbirth O99.73 - Diseases of the skin and subcutaneous tissue complicating the puerperium O99.8 - Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium 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 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 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 O99.84 - Bariatric 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 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

About ICD-10-CM Code O99 (Other maternal diseases classifiable elsewhere but complicating pregnancy)

ICD-10-CM code O99 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM O99 became effective on October 1, 2024.

This page provides detailed information about O99 - Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Other maternal diseases classifiable elsewhere but complicating pregnancy related to childbirth and the puerperium.