2026 ICD-10-CM Diagnosis Code O09.529Supervision of elderly multigravida, unspecified trimester

ICD-10-CM Codes›O00-O9A›O09›O09

ICD-10-CM O09.529
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O09.529 is a billable ICD-10-CM diagnosis code for supervision of elderly multigravida, 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 advanced maternal age gravida. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Supervision of high-risk pregnancy.

Code Identity

ICD-10-CM Code
O09.529
Billable Status
Yes — Valid for Submission
Code Describes
Supervision of elderly multigravida, unspecified trimester
Short Description
Supervision of elderly multigravida, unspecified trimester
Same as the full description in the CMS dataset.
Parent Code
O09.52
Supervision of elderly multigravida

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO09Supervision of high risk pregnancy
CategoryO09Supervision of high risk pregnancy
This CodeO09.529Supervision of elderly multigravida, unspecified trimester

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O09.529.

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

O09.529 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.

  • Advanced maternal age gravida
  • Antenatal care: multiparous, older than 35 years
  • Multigravida of advanced maternal age

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

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 O09.529 to ICD-9-CMHistory

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

ICD-9-CM
659.60 Elderly multigravida-uns
Approximate The match is approximate rather than exact.
ICD-9-CM
V23.82 Suprv elderly multigrav
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 O09.529Overview

Is O09.529 (Supervision of elderly multigravida) a billable code?

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

Can O09.529 be a principal diagnosis?

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

Who can O09.529 be reported for?

The Medicare Code Editor checks supervision of elderly multigravida, 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 O09.529 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 elderly multigravida, unspecified trimester on inpatient claims.

What is the ICD-9 equivalent of O09.529?

Under the General Equivalence Mappings, supervision of elderly multigravida, unspecified trimester converts to ICD-9-CM 659.60 (elderly multigravida-uns) and V23.82 (suprv elderly multigrav). 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.