O99

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

Non-billable header

O99 is a non-billable header code. Use one of the more specific codes below.

Inclusion terms

Includes

  • conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care
  • Note: CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Note: Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
  • Note: Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
  • Note: 1st trimester- less than 14 weeks 0 days
  • Note: 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
  • Note: 3rd trimester- 28 weeks 0 days until delivery

Excludes1

Not coded here — never report together with this code.

  • supervision of normal pregnancy (Z34.-)

Excludes2

Not included here — may be reported together when both conditions exist.

  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)
  • when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)

Use additional code

Add a code to identify the following, if applicable.

  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
  • code to identify specific condition

More specific codes O99

  • O99.0Anemia complicating pregnancy, childbirth and the puerperiumHeader
  • O99.1Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperiumHeader
  • O99.2Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperiumHeader
  • O99.3Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperiumHeader
  • O99.4Diseases of the circulatory system complicating pregnancy, childbirth and the puerperiumHeader
  • O99.5Diseases of the respiratory system complicating pregnancy, childbirth and the puerperiumHeader
  • O99.6Diseases of the digestive system complicating pregnancy, childbirth and the puerperiumHeader
  • O99.7Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperiumHeader
  • O99.8Other specified diseases and conditions complicating pregnancy, childbirth and the puerperiumHeader

Related codes

  • O94Sequelae of complication of pregnancy, childbirth, and the puerperiumBillable
  • O98Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperiumHeader
  • O9AMaternal malignant neoplasms, traumatic injuries and abuse classifiable elsewhere but complicating pregnancy, childbirth and the puerperiumHeader

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