ICD-10-CM 2027
ICD-10 code for pregnancy observation
From the official ICD-10-CM alphabetic index entry “Observation (following) (for) (without need for further medical care) › pregnancy (normal) (without complication)”. Page updated September 29, 2026.
About coding pregnancy observation
The ICD-10-CM code for pregnancy observation is Z34.9 (Encounter for supervision of normal pregnancy, unspecified). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on Z34.9.
Within Z34, choose Z34.9 (unspecified) only when documentation doesn't support a more specific option: normal first pregnancy (Z34.0) and other normal pregnancy (Z34.8).
To report this condition, pick the subcode that matches the documentation: Z34.90 (unspecified trimester), Z34.91 (first trimester), Z34.92 (second trimester) and Z34.93 (third trimester).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific pregnancy observation codes (official index)
- high risk O09.9 — Supervision of high risk pregnancy, unspecified
Common questions about pregnancy observation ICD-10 codes
What is the ICD-10 code for pregnancy observation?
- Z34.9 — Encounter for supervision of normal pregnancy, unspecified (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: O09.9.
What is the ICD-10 code for high risk pregnancy observation?
- O09.9 — Supervision of high risk pregnancy, unspecified (header code; choose a more specific subcode).
Is Z34.9 billable?
- No. Z34.9 is a header code. Report one of its more specific subcodes instead.