All ICD10 Codes
O10Not billable, use a more specific code below

Pre-existing hypertension complicating pregnancy, childbirth and the puerperium

In Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16), chapter 15: Pregnancy, Childbirth and the Puerperium

36 billable codes under O10: 1 is an MCC, 12 are a CC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

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Instructional notes

Includes: conditions that are coded here

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

Excludes2: not included here, code separately if applicable

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

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

  • Section I.C.15.d Pre-existing hypertension in pregnancy (page 66), covers O10

    When an O10 code for hypertensive heart disease or hypertensive chronic kidney disease is assigned, add a secondary code from the appropriate hypertension category to identify the type of heart failure or chronic kidney disease.

Other Chapter 15 topics:

Read Section I.C.15 (page 63), 10 more topics

All codes under O10

O10 can't be used on a claim. Pick a billable code below; grey headings group them.

O10 MS-DRGs

As the principal diagnosis, the billable codes under O10 group to these 8 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to O10

Notes on these codes point to O10.

  • I10 Excludes1: hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
  • I10-I1A Excludes2: hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
  • O11 Includes: conditions in O10 complicated by pre-eclampsia
  • O11 Use Additional Code: code from O10 to identify the type of hypertension
  • O15 Includes: convulsions following conditions in O10-O14 and O16
  • O99.4 Excludes2: hypertensive disorders (O10-O16)
  • P00.0 Includes: Newborn affected by maternal conditions classifiable to O10-O11, O13-O16

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Health Problems in Pregnancy

A health problem in pregnancy is any disease or condition that could affect your health or the health of your fetus. Some health problems may make it more likely that you will have a high-risk pregnancy. A high-risk pregnancy is one in which you, your fetus, or both are at higher risk for health problems than in a typical pregnancy.

Read more about health problems in pregnancy on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.