ICD-10-CM O10: Pre-existing hypertension complicating pregnancy, childbirth and the puerperium

ICD-10-CM Diagnosis Code (2025)

Official Description for O10

Pre-existing hypertension complicating pregnancy, childbirth and the puerperium

Coding Notes & Guidelines for O10

Includes Notes

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

Excludes2: Not Included Here

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

Use Additional Code

code from I11 to identify the type of hypertensive heart disease

Use Additional Code

code from I12 to identify the type of hypertensive chronic kidney disease

Use Additional Code

code from I13 to identify the type of hypertensive heart and chronic kidney disease

Use Additional Code

code from I15 to identify the type of secondary hypertension

Inclusion Terms

Any condition in I10 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium

Inclusion Terms

Any condition in I11 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium

Inclusion Terms

Any condition in I12 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium

Inclusion Terms

Any condition in I13 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium

Inclusion Terms

Any condition in I15 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium

Child Codes (More Specific Codes for O10):

O10.0 - Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium O10.01 - Pre-existing essential hypertension complicating pregnancy O10.011 - Pre-existing essential hypertension complicating pregnancy, first trimester O10.012 - Pre-existing essential hypertension complicating pregnancy, second trimester O10.013 - Pre-existing essential hypertension complicating pregnancy, third trimester O10.019 - Pre-existing essential hypertension complicating pregnancy, unspecified trimester O10.02 - Pre-existing essential hypertension complicating childbirth O10.03 - Pre-existing essential hypertension complicating the puerperium O10.1 - Pre-existing hypertensive heart disease complicating pregnancy, childbirth and the puerperium O10.11 - Pre-existing hypertensive heart disease complicating pregnancy O10.111 - Pre-existing hypertensive heart disease complicating pregnancy, first trimester O10.112 - Pre-existing hypertensive heart disease complicating pregnancy, second trimester O10.113 - Pre-existing hypertensive heart disease complicating pregnancy, third trimester O10.119 - Pre-existing hypertensive heart disease complicating pregnancy, unspecified trimester O10.12 - Pre-existing hypertensive heart disease complicating childbirth O10.13 - Pre-existing hypertensive heart disease complicating the puerperium O10.2 - Pre-existing hypertensive chronic kidney disease complicating pregnancy, childbirth and the puerperium O10.21 - Pre-existing hypertensive chronic kidney disease complicating pregnancy O10.211 - Pre-existing hypertensive chronic kidney disease complicating pregnancy, first trimester O10.212 - Pre-existing hypertensive chronic kidney disease complicating pregnancy, second trimester O10.213 - Pre-existing hypertensive chronic kidney disease complicating pregnancy, third trimester O10.219 - Pre-existing hypertensive chronic kidney disease complicating pregnancy, unspecified trimester O10.22 - Pre-existing hypertensive chronic kidney disease complicating childbirth O10.23 - Pre-existing hypertensive chronic kidney disease complicating the puerperium O10.3 - Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, childbirth and the puerperium O10.31 - Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy O10.311 - Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, first trimester O10.312 - Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, second trimester O10.313 - Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, third trimester O10.319 - Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, unspecified trimester O10.32 - Pre-existing hypertensive heart and chronic kidney disease complicating childbirth O10.33 - Pre-existing hypertensive heart and chronic kidney disease complicating the puerperium O10.4 - Pre-existing secondary hypertension complicating pregnancy, childbirth and the puerperium O10.41 - Pre-existing secondary hypertension complicating pregnancy O10.411 - Pre-existing secondary hypertension complicating pregnancy, first trimester O10.412 - Pre-existing secondary hypertension complicating pregnancy, second trimester O10.413 - Pre-existing secondary hypertension complicating pregnancy, third trimester O10.419 - Pre-existing secondary hypertension complicating pregnancy, unspecified trimester O10.42 - Pre-existing secondary hypertension complicating childbirth O10.43 - Pre-existing secondary hypertension complicating the puerperium O10.9 - Unspecified pre-existing hypertension complicating pregnancy, childbirth and the puerperium O10.91 - Unspecified pre-existing hypertension complicating pregnancy O10.911 - Unspecified pre-existing hypertension complicating pregnancy, first trimester O10.912 - Unspecified pre-existing hypertension complicating pregnancy, second trimester O10.913 - Unspecified pre-existing hypertension complicating pregnancy, third trimester O10.919 - Unspecified pre-existing hypertension complicating pregnancy, unspecified trimester O10.92 - Unspecified pre-existing hypertension complicating childbirth O10.93 - Unspecified pre-existing hypertension complicating the puerperium

About ICD-10-CM Code O10 (Pre-existing hypertension complicating pregnancy)

ICD-10-CM code O10 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM O10 became effective on October 1, 2024.

This page provides detailed information about O10 - Pre-existing hypertension complicating pregnancy, childbirth and the puerperium. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Pre-existing hypertension complicating pregnancy related to childbirth and the puerperium.