2026 ICD-10-CM Diagnosis Code A34Obstetrical tetanus

ICD-10-CM Codes›A00–B99›A30-A49›A34

ICD-10-CM A34
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A34 is a billable ICD-10-CM diagnosis code for obstetrical tetanus. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 769, 776. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 268 closely related codes. The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64). Coders also document this condition as induced termination of pregnancy complicated by infectious disease. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Bacterial infections and Complications specified during childbirth.

Code Identity

ICD-10-CM Code
A34
Billable Status
Yes — Valid for Submission
Code Describes
Obstetrical tetanus
Short Description
Obstetrical tetanus
Same as the full description in the CMS dataset.
Chapter
A30-A49
Other bacterial diseases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA30-A49Other bacterial diseases
CategoryA34Obstetrical tetanus
This CodeA34Obstetrical tetanus

Code EditsBilling

Medicare Code Editor checks that affect claim validity for A34.

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.

  • Induced termination of pregnancy complicated by infectious disease
  • Induced termination of pregnancy complicated by tetanus
  • Localized tetanus
  • Obstetrical tetanus
  • Puerperal tetanus
  • Tetanus following ectopic pregnancy
  • Tetanus following molar pregnancy

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR INF003
Bacterial infections
Default principal diagnosis: inpatient No · outpatient No
CCSR PRG023
Complications specified during childbirth
Default principal diagnosis: inpatient Yes · 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 A34 to ICD-9-CMHistory

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

ICD-9-CM
639.0 Postabortion gu infect
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 A34Overview

What is the ICD-10 code for obstetrical tetanus?

The ICD-10-CM code for obstetrical tetanus is A34. It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is A34 (Obstetrical tetanus) a billable code?

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

What MS-DRG does A34 group to?

When obstetrical tetanus is the principal diagnosis on an inpatient stay, it groups to MS-DRG 769, 776, with relative weights from 0.6547 to 1.6898 depending on complications. Higher weights mean higher Medicare reimbursement.

Is A34 a CC or MCC?

CMS lists A34 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 268 closely related codes in its exclusion list.

Who can A34 be reported for?

The Medicare Code Editor checks obstetrical tetanus against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.