Z33.1 Pregnant state, incidental

Billable ICD-10-CM code, FY2026.

Applicable to

• Pregnancy NOS
• Pregnant state NOS

Excludes1 (never code together)

• complications of pregnancy (O00-O9A)
• pregnant state, gestational carrier (Z33.3)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• V22.2 Pregnant state, incidental (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.

Diagnosis Index entries for Z33.1

• Carrier (suspected) of › gestational, pregnant
• Pregnancy (single) (uterine)
• Pregnancy (single) (uterine) › incidental finding
• State (of) › pregnant › incidental
• Status (post) › pregnancy, incidental

Nearby codes

• Z33 Pregnant state
• Z33.1 Pregnant state, incidental (this code)
• Z33.2 Encounter for elective termination of pregnancy
• Z33.3 Pregnant state, gestational carrier