O16 - Unspecified maternal hypertension

Version 2023
Short Description:Unspecified maternal hypertension
Long Description:Unspecified maternal hypertension
Status: Not Valid for Submission
Version:ICD-10-CM 2023
Code Classification:
  • Pregnancy, childbirth and the puerperium (O00–O99)
    • Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16)
      • Unspecified maternal hypertension (O16)

O16 is a non-specific and non-billable ICD-10 code code, consider using a code with a higher level of specificity for a diagnosis of unspecified maternal hypertension. The code is not specific and is NOT valid for the year 2023 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Unspecified diagnosis codes like O16 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Specific Coding for Unspecified maternal hypertension

Non-specific codes like O16 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for unspecified maternal hypertension:

  • BILLABLE CODE - Use O16.1 for Unspecified maternal hypertension, first trimester
  • BILLABLE CODE - Use O16.2 for Unspecified maternal hypertension, second trimester
  • BILLABLE CODE - Use O16.3 for Unspecified maternal hypertension, third trimester
  • BILLABLE CODE - Use O16.4 for Unspecified maternal hypertension, complicating childbirth
  • BILLABLE CODE - Use O16.5 for Unspecified maternal hypertension, complicating the puerperium
  • BILLABLE CODE - Use O16.9 for Unspecified maternal hypertension, unspecified trimester

Patient Education

High Blood Pressure in Pregnancy

What is high blood pressure in pregnancy?

Blood pressure is the force of your blood pushing against the walls of your arteries as your heart pumps blood. High blood pressure, or hypertension, is when this force against your artery walls is too high. There are different types of high blood pressure in pregnancy:

What causes preeclampsia?

The cause of preeclampsia is unknown.

Who is at risk for preeclampsia?

You are at higher risk of preeclampsia if you:

What problems can preeclampsia cause?

Preeclampsia can cause:

What are the symptoms of preeclampsia?

Possible symptoms of preeclampsia include:

Eclampsia can also cause seizures, nausea and/or vomiting, and low urine output. If you go on to develop HELLP syndrome, you may also have bleeding or bruising easily, extreme fatigue, and liver failure.

How is preeclampsia diagnosed?

Your health care provider will check your blood pressure and urine at each prenatal visit. If your blood pressure reading is high (140/90 or higher), especially after the 20th week of pregnancy, your provider will likely want to run some tests. They may include blood tests other lab tests to look for extra protein in the urine as well as other symptoms.

What are the treatments for preeclampsia?

Delivering the baby can often cure preeclampsia. When making a decision about treatment, your provider take into account several factors. They include how severe it is, how many weeks pregnant you are, and what the potential risks to you and your baby are:

The symptoms usually go away within 6 weeks of delivery. In rare cases, symptoms may not go away, or they may not start until after delivery (postpartum preeclampsia). This can be very serious, and it needs to be treated right away.

[Learn More in MedlinePlus]

Code History