What is the ICD-10 code for chronic hypertension in pregnancy?

The ICD-10 code for chronic hypertension in pregnancy is O10.0, which is used when hypertension is diagnosed before pregnancy and complicates the current pregnancy.

How is superimposed preeclampsia coded in ICD-10?

Superimposed preeclampsia is coded as O11 in ICD-10, used when a patient with chronic hypertension develops preeclampsia during pregnancy.

ICD-10 Coding for Chronic Hypertension in Pregnancy(O10.0, I11.9, N18.3)

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Learn about ICD-10 coding for chronic hypertension in pregnancy, including code O10.0 for pre-existing hypertension and O11 for superimposed preeclampsia.

Also known as:

Pre-existing Hypertension in PregnancyChronic HTN in Pregnancy

Related ICD-10 Code Ranges

Complete code families applicable to Chronic Hypertension in Pregnancy

O00-O9APrimary Range

Pregnancy, childbirth and the puerperium

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Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

Code	Description	When to Use	Key Documentation
O10.0	Pre-existing essential hypertension complicating pregnancy	Use when essential hypertension is diagnosed before pregnancy and complicates the current pregnancy.	Blood pressure ≥140/90 mmHg documented before 20 weeks of gestation Pre-pregnancy medical records confirming hypertension
O11	Pre-existing hypertension with superimposed preeclampsia	Use when a patient with chronic hypertension develops preeclampsia during pregnancy.	New proteinuria ≥300 mg/24h in a patient with chronic hypertension Clinical signs of preeclampsia such as elevated liver enzymes or thrombocytopenia

Primary ICD-10-CM Codes

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

O10.0

Differential Codes

Alternative codes to consider when ruling out similar conditions

Gestational hypertensionO13

PreeclampsiaO14

Documentation & Coding Risks

Avoid these common issues when documenting Chronic Hypertension in Pregnancy.

Omitting gestational age in documentation

Impact

Clinical: Inaccurate assessment of pregnancy complications., Regulatory: Non-compliance with coding standards., Financial: Potential loss of reimbursement for trimester-specific codes.

Mitigation

Always document gestational age with each visit., Use standardized templates for OB visits.

Confusing chronic hypertension with gestational hypertension

Impact

Reimbursement: Incorrect DRG assignment leading to potential underpayment., Compliance: Non-compliance with ICD-10 coding guidelines., Data Quality: Inaccurate clinical data affecting patient care.

Mitigation

Verify the timing of hypertension onset relative to pregnancy.

Incorrect use of gestational hypertension codes

Impact

Using O13 instead of O10 for pre-existing hypertension.

Mitigation

Educate coders on the importance of timing in hypertension diagnosis.

Frequently Asked Questions

Documentation requirements, coding pitfalls and FAQs for conditions coded with O10.0.

Primary Code

O10.0

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

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ICD-10 codes5

Coding risks3

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ICD-10 Coding for Chronic Hypertension in Pregnancy(O10.0, I11.9, N18.3)

Documentation & Coding Risks

Frequently Asked Questions

What is the ICD-10 code for chronic hypertension in pregnancy?

How is superimposed preeclampsia coded in ICD-10?

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