December 06, 2022

Washington: HCPCS codes for prenatal visits

The Washington State Health Care Authority (HCA) requires health care professionals treating pregnant members to use valid and complete HCPCS codes for all prenatal services.

When you use the correct codes, it alerts us to coordinate early access to care and case management for your high-risk patients who are members of UnitedHealthcare Community Plan of Washington. Our team of maternity nurses and professionals are available to support you and your patients, giving them and their babies the best chance for healthy outcomes.

What you need to do

Include the following HCPCS and appropriate ICD codes on all paper and electronic claims.

HCPCS code ICD diagnosis codes
0500F – Initial prenatal care visit Z33.1 – Pregnant state, incidental
Z34.00 – Encounter for supervision of normal first pregnancy, unspecified trimester
Z34.80 – Encounter for supervision of other normal pregnancy, unspecified trimester
Z34.90 – Encounter for supervision of normal pregnancy, unspecified, unspecified trimester


For more information, see page 218 of the Washington State HCA Physician-Related Services/Health Care Professional Services guide at

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