2027 ICD-10-CM Diagnosis Code Z34.81Encounter for supervision of other normal pregnancy, first trimester

ICD-10-CM Codes›Z00–Z99›Z30-Z39›Z34

ICD-10-CM Z34.81
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

Z34.81 is a billable ICD-10-CM diagnosis code for encounter for supervision of other normal pregnancy, first trimester. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 951. 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
Z34.81
Billable Status
Yes — Valid for Submission
Code Describes
Encounter for supervision of other normal pregnancy, first trimester
Short Description
Encounter for suprvsn of normal pregnancy, first trimester
Parent Code
Z34.8
Encounter for supervision of other normal pregnancy

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 CodeZ34.81Encounter for supervision of other normal pregnancy, first trimester

Code EditsBilling

Medicare Code Editor checks that affect claim validity for Z34.81.

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

Z34.81 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Persons encountering health services in circumstances related to reproduction (Z30-Z39).

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to Z34.81: its own notes plus those printed at Z34 and Chapter 21. A note printed at a category, block or chapter applies to every code under it.

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From Z34 Encounter for supervision of normal pregnancy applies to 12 codes
  • any complication of pregnancy (O00-O9A)
  • encounter for pregnancy test (Z32.0-)
  • encounter for supervision of high risk pregnancy (O09.-)

Notes

General instructions on how these codes are used.

From Chapter 21 (Z00-Z99) Factors influencing health status and contact with health services applies to 1,425 codes
  • Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
  • (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
  • (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name Z34.81, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming Z34.81: they are not reported together with it, unless the two conditions are unrelated.

  • Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium
    supervision of normal pregnancy (Z34.-) names Z34.-, which includes this code

Excludes2 2

These codes carry an Excludes2 note naming Z34.81: its condition is not part of those codes, and both may be reported when the patient has both.

  • Z36 Encounter for antenatal screening of mother
    routine prenatal care (Z34) names Z34, which includes this code
  • Block Z00-Z13 Persons encountering health services for examinations
    examinations related to pregnancy and reproduction (Z30-Z36, Z39.-) names Z30-Z36, which includes this code

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 Z34.81 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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About Z34.81Overview

What is the ICD-10 code for encounter for supervision of other normal pregnancy, first trimester?

The ICD-10-CM code for encounter for supervision of other normal pregnancy, first trimester is Z34.81 (sometimes written as Z3481). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is Z34.81 (Encounter for supervision of other normal pregnancy) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report encounter for supervision of other normal pregnancy, first trimester on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does Z34.81 group to?

On inpatient claims, encounter for supervision of other normal pregnancy, first trimester maps to MS-DRG 951 (other Factors Influencing Health Status), which carries a relative weight of 0.5574. Higher weights mean higher Medicare reimbursement.

Can Z34.81 be a principal diagnosis?

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

Who can Z34.81 be reported for?

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