Z34.03 Encounter for supervision of normal first pregnancy, third trimester

Billable ICD-10-CM code, FY2026. Exempt from present-on-admission (POA) reporting.

Applies from Z34 Encounter for supervision of normal pregnancy

Excludes1 (never code together)

• any complication of pregnancy (O00-O9A)
• encounter for pregnancy test (Z32.0-)
• encounter for supervision of high risk pregnancy (O09.-)

MS-DRG index

Defines the logic of DRG(s) 951 in MDC 23.

Approximate ICD-9-CM (GEMs)

• V22.0 Supervision of normal first pregnancy (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Maternity diagnoses (age 9 through 64): Age conflict edit. These diagnoses are clinically expected only in patients age 9 through 64.
• Unacceptable principal diagnosis: These codes describe a circumstance which influences care but is not a current illness or injury, or capture only an underlying condition, and are unacceptable as principal diagnosis.

Code annotations containing back-references to Z34.03

Back-references to Z34

• Type 2 Excludes: Z36 Encounter for antenatal screening of mother ("routine prenatal care (Z34)")

Nearby codes

• Z34 Encounter for supervision of normal pregnancy
• Z34.0 Encounter for supervision of normal first pregnancy
• Z34.00 Encounter for supervision of normal first pregnancy, unspecified trimester
• 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 (this code)
• Z34.8 Encounter for supervision of other normal pregnancy
• 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