2026 ICD-10-CM Diagnosis Code O99.824Streptococcus B carrier state complicating childbirth

ICD-10-CM Codes›O00-O9A›O94-O9A›O99

ICD-10-CM O99.824
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

O99.824 is a billable ICD-10-CM diagnosis code for Streptococcus B carrier state complicating childbirth. 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). Coders also document this condition as group B Streptococcus carrier. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Carrier status and Complications specified during childbirth.

Code Identity

ICD-10-CM Code
O99.824
Billable Status
Yes — Valid for Submission
Code Describes
Streptococcus B carrier state complicating childbirth
Short Description
Streptococcus B carrier state complicating childbirth
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 CodeO99.824Streptococcus B carrier state complicating childbirth

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O99.824.

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.

  • Group B Streptococcus carrier
  • Group B streptococcus carrier complicating pregnancy
  • Group B streptococcus carrier in childbirth
  • Group B streptococcus infection in mother complicating childbirth
  • Maternal infection caused by Streptococcus agalactiae
  • Streptococcus carrier

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.

    • Delivery(childbirth) (labor)
      • cesarean (for)
        • streptococcus group B (GBS) carrier state
    • Delivery(childbirth) (labor)
      • complicated
        • by
          • 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 PRG023
Complications specified during childbirth
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Childbirth Problems

Childbirth is the process of giving birth to a baby. It includes labor and delivery. Usually everything goes well, but problems can happen. They may cause a risk to the mother, baby, or both. Some of the more common childbirth problems include:

Read the full article at MedlinePlus

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

Convert O99.824 to ICD-9-CMHistory

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

ICD-9-CM
648.91 Oth curr cond-delivered
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 O99.824Overview

Is O99.824 a billable code?

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

Who can O99.824 be reported for?

The Medicare Code Editor checks Streptococcus B carrier state complicating childbirth 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 O99.824?

Under the General Equivalence Mappings, Streptococcus B carrier state complicating childbirth converts to ICD-9-CM 648.91 (oth curr cond-delivered) 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.