2027 ICD-10-CM Diagnosis Code A34Obstetrical tetanus
ICD-10-CM Codes›A00–B99›A30-A49›A34
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
A34 is a billable ICD-10-CM diagnosis code for obstetrical tetanus. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) 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
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for A34.
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
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to A34: its own notes plus those printed at Chapter 1. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- diseases generally recognized as communicable or transmissible
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify resistance to antimicrobial drugs (Z16.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name A34, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming A34: they are not reported together with it, unless the two conditions are unrelated.
- A35 Other tetanusobstetrical tetanus (A34)
Excludes2 4
These codes carry an Excludes2 note naming A34: its condition is not part of those codes, and both may be reported when the patient has both.
- Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperiumobstetrical tetanus (A34)
- Block O85-O92 Complications predominantly related to the puerperiumobstetrical tetanus (A34)
- O86 Other puerperal infectionsobstetrical tetanus (A34)
- O98 Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperiumobstetrical tetanus (A34)
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.
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.
Code HistoryHistory
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, 2026 through September 30, 2027.
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, 2026 through September 30, 2027.
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 0.6718 to 1.6666 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 2027. 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.
