O10.91 Unspecified pre-existing hypertension complicating pregnancy

Non-billable header with 4 child codes.

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

Includes

• 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.-)

Codes under O10.91

• 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

Code annotations containing back-references to O10.91

Back-references to O10

• Type 1 Excludes: I10 Essential (primary) hypertension ("hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)")
• Use Additional: O11 Pre-existing hypertension with pre-eclampsia ("code from O10 to identify the type of hypertension")
• Type 2 Excludes: O99.4 Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium ("hypertensive disorders (O10-O16)")

Diagnosis Index entries for O10.91

• Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) › complicating › pregnancy › pre-existing

Nearby codes

• 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 (this code)
• 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