2026 ICD-10-CM Diagnosis Code O09.90Supervision of high risk pregnancy, unspecified, unspecified trimester

ICD-10-CM Codes›O00-O9A›O09›O09

ICD-10-CM O09.90
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O09.90 is a billable ICD-10-CM diagnosis code for supervision of high risk pregnancy, unspecified, unspecified trimester. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64), not accepted as a principal diagnosis, and exempt from POA reporting. Coders also document this condition as antenatal care: gynecological risk. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Supervision of high-risk pregnancy.

Code Identity

ICD-10-CM Code
O09.90
Billable Status
Yes — Valid for Submission
Code Describes
Supervision of high risk pregnancy, unspecified, unspecified trimester
Short Description
Supervision of high risk pregnancy, unsp, unsp trimester
Parent Code
O09.9
Supervision of high risk pregnancy, unspecified

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO09Supervision of high risk pregnancy
CategoryO09Supervision of high risk pregnancy
This CodeO09.90Supervision of high risk pregnancy, unspecified, unspecified trimester

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O09.90.

Maternity diagnoses
The Medicare Code Editor detects inconsistencies in maternity cases by checking a patient's age and any diagnosis on the patient's record. The maternity code edits apply to patients age ange is 9–64 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).
Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)Billing

O09.90 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Antenatal care: gynecological risk
  • Antenatal care: medical risk
  • Antenatal care: obstetric risk
  • Antenatal risk factors
  • High risk pregnancy
  • Supervision of high risk pregnancy done
  • Supervision of high risk pregnancy for multigravida done

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR PRG008
Supervision of high-risk pregnancy
Default principal diagnosis: inpatient No · outpatient Yes

Clinical InformationClinical

  • High Risk Pregnancy

    a fetal/maternal condition that is risky and portends complications for the mother and/or fetus, when compared to a normal pregnancy.

Patient EducationClinical

Health Problems in Pregnancy

A health problem in pregnancy is any disease or condition that could affect your health or the health of your fetus. Some health problems may make it more likely that you will have a high-risk pregnancy. A high-risk pregnancy is one in which you, your fetus, or both are at higher risk for health problems than in a typical pregnancy.

The full article covers:

  • What are health problems in pregnancy?
  • What raises my risk for health problems during pregnancy?
  • Can chronic health conditions cause problems in pregnancy?
  • Can health problems in pregnancy be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert O09.90 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V23.9 Suprv high-risk preg NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About O09.90Overview

Is O09.90 (Supervision of high risk pregnancy, unspecified) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report supervision of high risk pregnancy, unspecified, unspecified trimester on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can O09.90 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because supervision of high risk pregnancy, unspecified, unspecified trimester describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Who can O09.90 be reported for?

The Medicare Code Editor checks supervision of high risk pregnancy, unspecified, unspecified trimester against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.

Is O09.90 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for supervision of high risk pregnancy, unspecified, unspecified trimester on inpatient claims.

What is the ICD-9 equivalent of O09.90?

Under the General Equivalence Mappings, supervision of high risk pregnancy, unspecified, unspecified trimester converts to ICD-9-CM V23.9 (suprv high-risk preg NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.