ICD-10 code guides
Reviewed July 1, 2026

ICD-10 codes for pregnancy supervision

Routine pregnancy-supervision coding is trimester-specific. High-risk supervision, complications, and weeks of gestation can change or add codes.

Z34.90 billable

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ICD-10-CM

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Pregnancy supervision ICD-10 codes

Start with the primary code, then move to a more specific related code when the documentation supports it.

CodeDescriptionSystem

Z34.90

Encounter for supervision of normal pregnancy, unspecified, unspecified trimester

ICD-10-CM

Z34.91

Encounter for supervision of normal pregnancy, unspecified, first trimester

ICD-10-CM

Z34.92

Encounter for supervision of normal pregnancy, unspecified, second trimester

ICD-10-CM

Z34.93

Encounter for supervision of normal pregnancy, unspecified, third trimester

ICD-10-CM

O09.90

Supervision of high risk pregnancy, unspecified, unspecified trimester

ICD-10-CM

Z3A.20

20 weeks gestation of pregnancy

ICD-10-CM

How to choose the right code

Use Z34.- for routine normal pregnancy supervision, with trimester specificity when documented. Use O09.- for high-risk pregnancy supervision. Add the appropriate Z3A.- weeks-of-gestation code when documented and required.

Documentation example

Routine antenatal visit at 20 weeks gestation. No bleeding, contractions, headache, or visual symptoms. Fundal height appropriate, fetal movements present. Assessment: normal second-trimester pregnancy supervision.

Suggested:

Z34.92
Z3A.20

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FAQ

When do I use Z34.92?

Use Z34.92 for routine supervision of a normal pregnancy in the second trimester when no high-risk condition or complication is being coded as the primary reason.

When does pregnancy supervision become high risk?

When the clinician documents high-risk pregnancy supervision or a high-risk condition driving the visit, coding usually moves from Z34.- to O09.- or a complication code.

Can AI capture trimester and gestational age?

Notat extracts gestational age, trimester, risk status, symptoms, and assessment as clinical facts, then suggests the supported pregnancy-supervision codes with evidence.

Related ICD-10 guides

Keep moving through the condition hub, or open the general medical coding guide for more coding systems and extractors.

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