ICD-10 Code O10.911

Unspecified pre-existing hypertension complicating pregnancy, first trimester

Version 2019 Billable Code Maternity Diagnoses Diagnoses For Females Only First Trimester (0 to 13 Weeks)
ICD-10: O10.911
Short Description:Unsp pre-existing htn comp pregnancy, first trimester
Long Description:Unspecified pre-existing hypertension complicating pregnancy, first trimester

Valid for Submission

ICD-10 O10.911 is a billable code used to specify a medical diagnosis of unspecified pre-existing hypertension complicating pregnancy, first trimester. The code is valid for the year 2019 for the submission of HIPAA-covered transactions.

Code Classification

  • Pregnancy, childbirth and the puerperium (O00–O99)
    • Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16)
      • Pre-existing hypertension compl preg/chldbrth (O10)

Information for Medical Professionals

Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10 Code Edits are applicable to this code:

  • Maternity diagnoses - Maternity. Age range is 12–55 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).
  • Diagnoses for females only - Diagnoses for females only.

Diagnostic Related Groups

The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). The diagnosis code O10.911 is grouped in the following groups for version MS-DRG V36.0 applicable from 10/01/2018 through 09/30/2019.

  • 817 - OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURE WITH MCC
  • 818 - OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURE WITH CC
  • 819 - OTHER ANTEPARTUM DIAGNOSES WITH O.R. PROCEDURE WITHOUT CC/MCC

Convert O10.911 to ICD-9

The following crosswalk between ICD-10 to ICD-9 is based based on the General Equivalence Mappings (GEMS) information:

  • 642.01 - Essen hyperten-delivered (Approximate Flag)
  • 642.03 - Essen hyperten-antepart (Approximate Flag)

Information for Patients


High Blood Pressure in Pregnancy

If you are pregnant, high blood pressure can cause problems for you and your unborn baby. You may have had high blood pressure before you got pregnant. Or you may get it once you are pregnant - a condition called gestational hypertension. Either one can cause low birth weight or premature delivery of the baby.

Controlling your blood pressure during pregnancy and getting regular prenatal care are important for the health of you and your baby. Treatments for high blood pressure in pregnancy may include close monitoring of the baby, lifestyle changes, and certain medicines.

Some pregnant women with high blood pressure develop preeclampsia. It's a sudden increase in blood pressure after the 20th week of pregnancy. It can be life-threatening for both you and the unborn baby. There is no proven way to prevent it. Most women who have signs of preeclampsia are closely monitored to lessen or avoid complications.

Delivering the baby can often cure preeclampsia. But sometimes you may need to take medicines. The symptoms usually go away within 6 weeks of delivery. In rare cases, symptoms may not start until after delivery. This is called postpartum preeclampsia. It can also be very serious, and it needs to be treated right away.

  • Eclampsia (Medical Encyclopedia)
  • HELLP syndrome (Medical Encyclopedia)
  • Preeclampsia (Medical Encyclopedia)
  • Preeclampsia - self-care (Medical Encyclopedia)

[Learn More]

ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.