2026 ICD-10-CM Diagnosis Code Z34.92Encounter for supervision of normal pregnancy, unspecified, second trimester

ICD-10-CM Codes›Z00–Z99›Z30-Z39›Z34

ICD-10-CM Z34.92
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z34.92 is a billable ICD-10-CM diagnosis code for encounter for supervision of normal pregnancy, unspecified, second trimester. 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), not accepted as a principal diagnosis, and exempt from POA reporting. Coders also document this condition as second trimester pregnancy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Uncomplicated pregnancy, delivery or puerperium.

This medical diagnosis code is frequently used in OB/GYN medical specialties to designate conditions such supervision of normal pregnancy.

Code Identity

ICD-10-CM Code
Z34.92
Billable Status
Yes — Valid for Submission
Code Describes
Encounter for supervision of normal pregnancy, unspecified, second trimester
Short Description
Encntr for suprvsn of normal preg, unsp, second trimester
Parent Code
Z34.9
Encounter for supervision of normal pregnancy, unspecified

Code Classification

ChapterZ00–Z99Factors influencing health status and contact with health services
SectionZ30-Z39Persons encountering health services in circumstances related to reproduction
CategoryZ34Encounter for supervision of normal pregnancy
This CodeZ34.92Encounter for supervision of normal pregnancy, unspecified, second trimester

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z34.92.

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.

Present on Admission (POA)Billing

Z34.92 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Second trimester pregnancy

Clinical ClassificationClinical

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

CCSR PRG029
Uncomplicated pregnancy, delivery or puerperium
Default principal diagnosis: inpatient No · outpatient Yes

Patient EducationClinical

Prenatal Care

Prenatal care is the health care you get while you are pregnant. It includes your checkups and prenatal testing. Typically, a health care provider specializing in the delivery of babies and the care of pregnant women, such as an obstetrician or a midwife, provides prenatal care.

The full article covers:

  • What is prenatal care?
  • Why do I need prenatal care?
  • How often do I need prenatal visits?
  • What happens during prenatal visits?

Read the full article at MedlinePlus

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

Convert Z34.92 to ICD-9-CMHistory

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

ICD-9-CM
V22.1 Supervis oth normal preg
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 Z34.92Overview

Is Z34.92 (Encounter for supervision of normal pregnancy, unspecified) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report encounter for supervision of normal pregnancy, unspecified, second trimester on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z34.92 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because encounter for supervision of normal pregnancy, unspecified, second trimester describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

Who can Z34.92 be reported for?

The Medicare Code Editor checks encounter for supervision of normal pregnancy, unspecified, second trimester against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.

Is Z34.92 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for encounter for supervision of normal pregnancy, unspecified, second trimester on inpatient claims.

What is the ICD-9 equivalent of Z34.92?

Under the General Equivalence Mappings, encounter for supervision of normal pregnancy, unspecified, second trimester converts to ICD-9-CM V22.1 (supervis oth normal preg). The mapping is approximate, so confirm the match fits the documentation.