O10

Classification

Category:Pregnancy, childbirth and the puerperium

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Coding Guidance

O10 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail.

Inclusion Terms

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

Excludes 1

Z34

supervision of normal pregnancy

Excludes 2

O11

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

F53

mental and behavioral disorders associated with the puerperium

A34

obstetrical tetanus

E23.0

postpartum necrosis of pituitary gland

M83.0

puerperal osteomalacia

Use Additional Code

From O00-O9A

code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known

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

External Resources

2025 ICD-10 guidelines from CMS.gov