ICD-10-CM 2027
ICD-10 code for pregnancy
Encounter for supervision of normal first pregnancy, unspecified trimester
Confirmed by the official ICD-10-CM index entry “pregnancy (single) (uterine) › examination (normal) › first”. Page updated September 29, 2026.
About coding pregnancy
The ICD-10-CM code for pregnancy is Z34.00 (Encounter for supervision of normal first pregnancy, unspecified trimester). The official index lists 14 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on Z34.00.
It is also searched as prenatal visit.
Within Z34.0, choose Z34.00 (unspecified trimester) only when documentation doesn't support a more specific option: first trimester (Z34.01), second trimester (Z34.02) and third trimester (Z34.03).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Related Pregnancy codes
- Z33.1 Pregnant state, incidental
- Z33.2 Encounter for elective termination of pregnancy
- Z33.3 Pregnant state, gestational carrier
- Z34.01 Encounter for supervision of normal first pregnancy, first trimester
- Z34.02 Encounter for supervision of normal first pregnancy, second trimester
- Z34.03 Encounter for supervision of normal first pregnancy, third trimester
- Z34.80 Encounter for supervision of other normal pregnancy, unspecified trimester
- Z34.81 Encounter for supervision of other normal pregnancy, first trimester
- Z34.82 Encounter for supervision of other normal pregnancy, second trimester
- Z34.83 Encounter for supervision of other normal pregnancy, third trimester
- Z34.90 Encounter for supervision of normal pregnancy, unspecified, unspecified trimester
- Z34.91 Encounter for supervision of normal pregnancy, unspecified, first trimester
- Z34.92 Encounter for supervision of normal pregnancy, unspecified, second trimester
- Z34.93 Encounter for supervision of normal pregnancy, unspecified, third trimester
Common questions about pregnancy ICD-10 codes
What is the ICD-10 code for pregnancy?
- Z34.00 — Encounter for supervision of normal first pregnancy, unspecified trimester. More specific codes apply when the documentation supports them: Z33.1, Z33.2, Z33.3, Z34.01 and others below.
What is the ICD-10 code for pregnant state, incidental?
- Z33.1 — Pregnant state, incidental.
What is the ICD-10 code for encounter for elective termination of pregnancy?
- Z33.2 — Encounter for elective termination of pregnancy.
What is the ICD-10 code for pregnant state, gestational carrier?
- Z33.3 — Pregnant state, gestational carrier.
What is the ICD-10 code for encounter for supervision of normal first pregnancy, first trimester?
- Z34.01 — Encounter for supervision of normal first pregnancy, first trimester.
What is the ICD-10 code for encounter for supervision of normal first pregnancy, second trimester?
- Z34.02 — Encounter for supervision of normal first pregnancy, second trimester.
What is the ICD-10 code for encounter for supervision of normal first pregnancy, third trimester?
- Z34.03 — Encounter for supervision of normal first pregnancy, third trimester.
Is Z34.00 billable?
- Yes. Z34.00 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z34.00 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z34.00 a CC or MCC?
- No. Z34.00 is neither a CC nor an MCC under MS-DRG v44.0.