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O10.013

O10.013: Pre-existing essential hypertension complicating pregnancy, third trimester

Billable / specific codeICD-10-CM

O10.013 is a billable, specific ICD-10-CM code for pre-existing essential hypertension complicating pregnancy, third trimester. It is valid for submission on a claim.

Check O10.013 with the rest of the claim: free scrubber

Excludes2 inherited from the categories above O10.013

Not part of this code, but both may be coded when both are present.

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

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

Risk adjustment

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

Medicare coverage

O10.013 is named in 2 Medicare coverage policies: 2 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A57189Billing and Coding: Serum Magnesium
  • A57326Billing and Coding: Electrocardiograms

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under O10.01

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.