2026 ICD-10-CM Diagnosis Code O88.23Thromboembolism in the puerperium

ICD-10-CM Codes›O00-O9A›O85-O92›O88

ICD-10-CM O88.23
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O88.23 is a billable ICD-10-CM diagnosis code for thromboembolism in 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.

Code Identity

ICD-10-CM Code
O88.23
Billable Status
Yes — Valid for Submission
Code Describes
Thromboembolism in the puerperium
Short Description
Thromboembolism in the puerperium
Same as the full description in the CMS dataset.
Parent Code
O88.2
Obstetric thromboembolism

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO85-O92Complications predominantly related to the puerperium
CategoryO88Obstetric embolism
This CodeO88.23Thromboembolism in the puerperium

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O88.23.

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).

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Puerperal (pulmonary) embolism NOS

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.

    • Embolism(multiple) (paradoxical)
      • obstetric (in) (pulmonary)
        • puerperal
    • Embolism(multiple) (paradoxical)
      • obstetric (in) (pulmonary)
        • puerperal
          • blood clot
    • Occlusion, occluded
      • artery
        • precerebral
          • puerperal

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

Patient EducationClinical

Deep Vein Thrombosis

Deep vein thrombosis, or DVT, is a blood clot that forms in a vein deep in the body. Most deep vein clots occur in the lower leg or thigh. If the vein swells, the condition is called thrombophlebitis. A deep vein thrombosis can break loose and cause a serious problem in the lung, called a pulmonary embolism.

Read the full article at MedlinePlus

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

Convert O88.23 to ICD-9-CMHistory

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

ICD-9-CM
673.22 Pulm embol NOS-del w p/p
Approximate The match is approximate rather than exact.
ICD-9-CM
673.24 Pulm embol NOS-postpart
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 O88.23Overview

Is O88.23 (Obstetric thromboembolism) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report thromboembolism in the puerperium on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Who can O88.23 be reported for?

The Medicare Code Editor checks thromboembolism in 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 O88.23?

Under the General Equivalence Mappings, thromboembolism in the puerperium converts to ICD-9-CM 673.22 (pulm embol NOS-del w p/p) and 673.24 (pulm embol NOS-postpart). 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.