MCMedicalCodingSoftware
O10

O10: Pre-existing hypertension complicating pregnancy, childbirth and the puerperium

Non-billable headerICD-10-CM

O10 is a non-billable header ICD-10-CM code for pre-existing hypertension complicating pregnancy, childbirth and the puerperium. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2: not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

  • pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (O11.-)

Includes

Conditions this code covers.

  • pre-existing hypertension with pre-existing proteinuria complicating pregnancy, childbirth and the puerperium

Other codes that can never be billed with O10

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • I10Essential (primary) hypertension

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead O10

6 child codes. Green means billable.

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.