2026 ICD-10-CM Diagnosis Code Z34.90Encounter for supervision of normal pregnancy, unspecified, unspecified trimester

ICD-10-CM Codes›Z00–Z99›Z30-Z39›Z34

ICD-10-CM Z34.90
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

Z34.90 is a billable ICD-10-CM diagnosis code for encounter for supervision of normal pregnancy, unspecified, unspecified 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. 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
Z34.90
Billable Status
Yes — Valid for Submission
Code Describes
Encounter for supervision of normal pregnancy, unspecified, unspecified trimester
Short Description
Encntr for suprvsn of normal pregnancy, unsp, unsp 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 CodeZ34.90Encounter for supervision of normal pregnancy, unspecified, unspecified trimester

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z34.90.

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

Z34.90 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.

  • Amniotic membranes normal
  • Amniotic membranes present
  • Antenatal - shared care
  • Antenatal amniocentesis
  • Antenatal care from consultant
  • Antenatal care from general practitioner
  • Antenatal care midwifery led
  • Antenatal care provider
  • Cardiotochogram finding
  • Cervical cerclage suture absent
  • Cervix central
  • Cervix thin
  • Condition of fetal membrane
  • CTG reactivity - finding
  • Early stage of pregnancy
  • Fetal heart baseline pattern - finding
  • Fetal heart sounds loud
  • Fetal heart sounds present
  • Fetal movement strength - finding
  • Finding of arrangement of gravid uterus
  • Finding of cervical cerclage suture
  • Finding of completeness of membranes
  • Finding of device of cervix
  • Finding of fetal heart sounds
  • Finding of height of gravid uterus
  • Finding of number of membranes
  • Finding of passing of operculum
  • Finding of pattern of fetal movement
  • Finding of position of pregnancy
  • Finding of pulsation of cord
  • Finding of shape of pregnant abdomen
  • Finding of thickness of cervix
  • Finding of vaginal liquor
  • Finding related to placental secretion of chorionic gonadotropin
  • Fundal height equal to dates
  • Gravid uterus central
  • Gravid uterus deviated to left
  • Gravid uterus deviated to right
  • Gravid uterus normal
  • Gravid uterus present
  • Intact fetal membranes
  • Intact membranes
  • Intact membranes bulging through cervix
  • Intrauterine pregnancy
  • Low risk pregnancy
  • Membranes complete
  • No liquor observed vaginally
  • Normal endocrine system
  • Normal endocrine system function
  • Normal fetal heart baseline pattern
  • Normal hormone secretion
  • Normal placental secretion of chorionic gonadotropin
  • Normal position of gravid uterus
  • Normal position of uterus
  • Operculum not passed
  • Ovoid pregnant abdomen
  • Partially effaced cervix
  • Pelvis adequate for delivery
  • Placenta healthy
  • Pregnancy with certain dates
  • Pregnancy with uncertain dates
  • Pregnant uterus displaced laterally
  • Presentation of pregnancy
  • Pulsation of umbilical cord not palpable through intact membranes
  • Pulsation of umbilical cord palpable through intact membrane
  • Reactive CTG tracing
  • Ripe cervix
  • Rounded pregnant abdomen
  • Strong fetal movements
  • Transversely enlarged pregnant abdomen
  • Two placental membranes present
  • Umbilical cord normal
  • Uneffaced cervix
  • Uterus central
  • Uterus deviated to left
  • Uterus deviated to right
  • Volume of fetal heart sounds - finding
  • Volume of heart sounds - finding

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.

    • Antenatal
      • care (normal 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 Z34.90 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 Z34.90Overview

Is Z34.90 (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, unspecified trimester on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Can Z34.90 be a principal diagnosis?

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

Who can Z34.90 be reported for?

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

Is Z34.90 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, unspecified trimester on inpatient claims.

What is the ICD-9 equivalent of Z34.90?

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