2026 ICD-10-CM Diagnosis Code O99.825Streptococcus B carrier state complicating the puerperium

ICD-10-CM Codes›O00-O9A›O94-O9A›O99

ICD-10-CM O99.825
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O99.825 is a billable ICD-10-CM diagnosis code for Streptococcus B carrier state 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) and not accepted as a principal diagnosis. Coders also document this condition as maternal infection caused by Streptococcus agalactiae. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Carrier status and Complications specified during the puerperium.

Code Identity

ICD-10-CM Code
O99.825
Billable Status
Yes — Valid for Submission
Code Describes
Streptococcus B carrier state complicating the puerperium
Short Description
Streptococcus B carrier state complicating the puerperium
Same as the full description in the CMS dataset.
Parent Code
O99.82
Streptococcus B carrier state complicating pregnancy, childbirth and the puerperium

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO94-O9AOther obstetric conditions, not elsewhere classified
CategoryO99Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
This CodeO99.825Streptococcus B carrier state complicating the puerperium

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O99.825.

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.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Maternal infection caused by Streptococcus agalactiae

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)
      • infection
        • maternal
          • streptococcus group B (GBS) carrier state

Clinical ClassificationClinical

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

CCSR FAC024
Carrier status
Default principal diagnosis: inpatient No · outpatient No
CCSR PRG027
Complications specified during the puerperium
Default principal diagnosis: inpatient No · outpatient Yes

Patient EducationClinical

Infections and Pregnancy

During pregnancy, some common infections such as the common cold or a skin infection do not usually cause serious problems. Some infections, such as the flu, can be more severe when you're pregnant. But other infections can be harmful to you, your fetus, or both.

The full article covers:

  • How can infections affect your pregnancy?
  • What infections can be harmful during pregnancy?
  • What are the symptoms of an infection during pregnancy?
  • What are the treatments for infections during pregnancy?
  • Can infections during pregnancy be prevented?

Read the full article at MedlinePlus

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

Convert O99.825 to ICD-9-CMHistory

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

ICD-9-CM
648.94 Oth curr cond-postpartum
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.
ICD-9-CM
V02.51 Group b streptoc carrier
ApproximateCombination The match is approximate, and more than one code can be needed to describe the source diagnosis. Confirm with contextual judgment.

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 O99.825Overview

Is O99.825 a billable code?

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

Can O99.825 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because Streptococcus B carrier state complicating the puerperium describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Who can O99.825 be reported for?

The Medicare Code Editor checks Streptococcus B carrier state 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 O99.825?

Under the General Equivalence Mappings, Streptococcus B carrier state complicating the puerperium converts to ICD-9-CM 648.94 (oth curr cond-postpartum) and V02.51 (group b streptoc carrier). 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.