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

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Pre-existing hypertension complicating pregnancy, childbirth and the puerperium is O10 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
O10-O16: Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16)
Category O10
49 codes (36 billable)
FY2026 Status
Stable since FY2024
Includes
  • pre-existing hypertension with pre-existing proteinuria complicating pregnancy, childbirth and the puerperium
Excludes2
Not included here. These conditions are coded elsewhere but may be coded together if applicable.
  • pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (O11.-)

Official Coding Guidelines

O10 with hypertensive heart/CKD: add secondary code

d. Pre-existing hypertension in pregnancy Category O10, Pre-existing hypertension complicating pregnancy, childbirth and the puerperium, includes codes for hypertensive heart and hypertensive chronic kidney disease. When assigning one of the O10 codes that includes hypertensive heart disease or hypertensive chronic kidney disease, it is necessary to add a secondary code from the appropriate hypertension category to specify the type of heart failure or chronic kidney disease. See Section I.C.9. Hypertension.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.15.d

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Cite This Page

Reference O10 with the canonical source and edition:

O10 — Pre-existing hypertension complicating pregnancy, childbirth and the puerperium. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/O10

Canonical URL: https://icd10codingpro.com/codes/O10

Related Codes

More Specific Codes

O10.0 Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium O10.1 Pre-existing hypertensive heart disease complicating pregnancy, childbirth and the puerperium O10.2 Pre-existing hypertensive chronic kidney disease complicating pregnancy, childbirth and the puerperium O10.3 Pre-existing hypertensive heart and chronic kidney disease complicating pregnancy, childbirth and the puerperium O10.4 Pre-existing secondary hypertension complicating pregnancy, childbirth and the puerperium O10.9 Unspecified pre-existing hypertension complicating pregnancy, childbirth and the puerperium

All Codes in O10

Every most-specific code under O10 Pre-existing hypertension complicating pregnancy, childbirth and the puerperium (36 codes):

Show the complete O10 code list
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 O10.111 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 O10.211 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 O10.311 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 O10.411 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 O10.911 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
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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