O09
Supervision of high risk pregnancy
O09 is a non-billable ICD-10-CM code category for supervision of high risk pregnancy. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are O09.0 Supervision of pregnancy with history of infertility, O09.1 Supervision of pregnancy with history of ectopic pregnancy, O09.A Supervision of pregnancy with history of molar pregnancy, O09.2 Supervision of pregnancy with other poor reproductive or obstetric history and 7 more. Its coding notes include a Use additional code instruction, 1 Excludes1 entry and 4 Excludes2 entries.
Guidelines tips
From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.
The trimester character comes from the provider's documentation for the current encounter. The unspecified trimester code should rarely be used.
O09 is used only in the prenatal period. It is first-listed for routine prenatal visits in high-risk pregnancies.
Use additional code
Add the listed code as a secondary code, if known.
Also from chapter/block level (1 note)
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Also from chapter/block level (1 note)
- supervision of normal pregnancy (Z34.-)
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (4 notes)
Notes
Also from chapter/block level (6 notes)
- CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
- 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)
- Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
- 1st trimester- less than 14 weeks 0 days
- 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
- 3rd trimester- 28 weeks 0 days until delivery
More specific codes under O09 11
- O09.0Supervision of pregnancy with history of infertilityHeader
- O09.1Supervision of pregnancy with history of ectopic pregnancyHeader
- O09.ASupervision of pregnancy with history of molar pregnancyHeader
- O09.2Supervision of pregnancy with other poor reproductive or obstetric historyHeader
- O09.3Supervision of pregnancy with insufficient antenatal careHeader
- O09.4Supervision of pregnancy with grand multiparityHeader
- O09.5Supervision of elderly primigravida and multigravidaHeader
- O09.6Supervision of young primigravida and multigravidaHeader
- O09.7Supervision of high risk pregnancy due to social problemsHeader
- O09.8Supervision of other high risk pregnanciesHeader
- O09.9Supervision of high risk pregnancy, unspecifiedHeader