2026 ICD-10-CM Diagnosis Code O87.1Deep phlebothrombosis in the puerperium

ICD-10-CM Codes›O00-O9A›O85-O92›O87

ICD-10-CM O87.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O87.1 is a billable ICD-10-CM diagnosis code for deep phlebothrombosis 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 Acute phlebitis; thrombophlebitis and thromboembolism and Complications specified during the puerperium.

Code Identity

ICD-10-CM Code
O87.1
Billable Status
Yes — Valid for Submission
Code Describes
Deep phlebothrombosis in the puerperium
Short Description
Deep phlebothrombosis in the puerperium
Same as the full description in the CMS dataset.
Parent Code
O87
Venous complications and hemorrhoids in the puerperium

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO85-O92Complications predominantly related to the puerperium
CategoryO87Venous complications and hemorrhoids in the puerperium
This CodeO87.1Deep phlebothrombosis in the puerperium

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O87.1.

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).

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Deep venous thrombosis in puerperium
  • Pelvic thrombophlebitis in puerperium
  • Phlebitis in puerperium
  • Phlegmasia alba dolens
  • Phlegmasia alba dolens in puerperium
  • Postpartum acute deep vein thrombosis
  • Postpartum chronic deep vein thrombosis
  • Thrombophlebitis in puerperium
  • Thrombophlebitis of pelvic vein
  • White discoloration of skin

Tabular List NotesGuidance

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

Inclusion Terms

  • Deep vein thrombosis, postpartum
  • Pelvic thrombophlebitis, postpartum

Use Additional Code

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.

    • Milk-leg(deep vessels) (nonpuerperal)
      • puerperal, postpartum, childbirth
    • Phlebitis(infective) (pyemic) (septic) (suppurative)
      • pelvic
        • puerperal, postpartum
    • Phlebitis(infective) (pyemic) (septic) (suppurative)
      • puerperal, postpartum, childbirth
        • deep
    • Phlebitis(infective) (pyemic) (septic) (suppurative)
      • puerperal, postpartum, childbirth
        • pelvic
    • Phlegmasia
      • alba dolens
    • Puerperal, puerperium(complicated by, complications)
      • milk leg
    • Puerperal, puerperium(complicated by, complications)
      • phlebitis
        • deep
    • Puerperal, puerperium(complicated by, complications)
      • phlebitis
        • pelvic
    • Puerperal, puerperium(complicated by, complications)
      • phlebothrombosis, deep
    • Puerperal, puerperium(complicated by, complications)
      • phlegmasia alba dolens
    • Puerperal, puerperium(complicated by, complications)
      • thrombophlebitis (superficial)
        • deep
    • Puerperal, puerperium(complicated by, complications)
      • thrombophlebitis (superficial)
        • pelvic
    • Puerperal, puerperium(complicated by, complications)
      • white leg
    • Thrombophlebitis
      • pelvic
        • puerperal
    • Thrombophlebitis
      • puerperal, postpartum, childbirth
        • deep
    • Thrombophlebitis
      • puerperal, postpartum, childbirth
        • pelvic
    • White
      • leg, puerperal, postpartum, childbirth

Clinical ClassificationClinical

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

CCSR CIR033
Acute phlebitis; thrombophlebitis and thromboembolism
Default principal diagnosis: inpatient No · outpatient No
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 O87.1 to ICD-9-CMHistory

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

ICD-9-CM
671.42 Thromb postpar-del w p/p
Approximate The match is approximate rather than exact.
ICD-9-CM
671.44 Deep vein thromb-postpar
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 O87.1Overview

Is O87.1 (Venous complications and hemorrhoids in the puerperium) a billable code?

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

Who can O87.1 be reported for?

The Medicare Code Editor checks deep phlebothrombosis 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 O87.1?

Under the General Equivalence Mappings, deep phlebothrombosis in the puerperium converts to ICD-9-CM 671.42 (thromb postpar-del w p/p) and 671.44 (deep vein thromb-postpar). 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.