2026 ICD-10-CM Diagnosis Code O9A.23Injury, poisoning and certain other consequences of external causes complicating the puerperium

ICD-10-CM Codes›O00-O9A›O94-O9A›O9A

ICD-10-CM O9A.23
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O9A.23 is a billable ICD-10-CM diagnosis code for injury, poisoning and certain other consequences of external causes complicating the puerperium. 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). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complications specified during the puerperium and Other unspecified injury.

Code Identity

ICD-10-CM Code
O9A.23
Billable Status
Yes — Valid for Submission
Code Describes
Injury, poisoning and certain other consequences of external causes complicating the puerperium
Short Description
Inj/poisn/oth conseq of external causes comp the puerperium
Parent Code
O9A.2
Injury, poisoning and certain other consequences of external causes complicating pregnancy, childbirth and the puerperium

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO94-O9AOther obstetric conditions, not elsewhere classified
CategoryO9AMaternal malignant neoplasms, traumatic injuries and abuse classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
This CodeO9A.23Injury, poisoning and certain other consequences of external causes complicating the puerperium

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O9A.23.

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).

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Puerperal, puerperium(complicated by, complications)
      • trauma, non-obstetric

Clinical ClassificationClinical

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

CCSR PRG027
Complications specified during the puerperium
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INJ027
Other unspecified injury
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Poisoning

A poison is any substance that is harmful to your body. You might swallow it, inhale it, inject it, or absorb it through your skin. Any substance can be poisonous if too much is taken. Poisons can include:

Read the full article at MedlinePlus

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

Convert O9A.23 to ICD-9-CMHistory

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

ICD-9-CM
648.94 Oth curr cond-postpartum
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 O9A.23Overview

Is O9A.23 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report injury, poisoning and certain other consequences of external causes complicating the puerperium on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Who can O9A.23 be reported for?

The Medicare Code Editor checks injury, poisoning and certain other consequences of external causes complicating the puerperium against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.

What is the ICD-9 equivalent of O9A.23?

Under the General Equivalence Mappings, injury, poisoning and certain other consequences of external causes complicating the puerperium converts to ICD-9-CM 648.94 (oth curr cond-postpartum). 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.