2024 ICD-10-CM Diagnosis Code I1A.0

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

• Resistant hypertensive disorder

Clinical Information

• Essential Hypertension

  hypertension that occurs without known cause, or preexisting renal disease. associated polymorphisms for a number of genes have been identified, including agt, gnb3, and ece1. omim: 145500

• Familial Primary Pulmonary Hypertension

  familial or idiopathic hypertension in the pulmonary circulation which is not secondary to other disease.

• Hypertension

  persistently high systemic arterial blood pressure. based on multiple readings (blood pressure determination), hypertension is currently defined as when systolic pressure is consistently greater than 140 mm hg or when diastolic pressure is consistently 90 mm hg or more.

• Hypertension, Malignant

  a condition of markedly elevated blood pressure with diastolic pressure usually greater than 120 mm hg. malignant hypertension is characterized by widespread vascular damage, papilledema, retinopathy, hypertensive encephalopathy, and renal dysfunction.

• Hypertension, Portal

  abnormal increase of resistance to blood flow within the hepatic portal system, frequently seen in liver cirrhosis and conditions with obstruction of the portal vein.

• Hypertension, Pregnancy-Induced

  a condition in pregnant women with elevated systolic (>140 mm hg) and diastolic (>90 mm hg) blood pressure on at least two occasions 6 h apart. hypertension complicates 8-10% of all pregnancies, generally after 20 weeks of gestation. gestational hypertension can be divided into several broad categories according to the complexity and associated symptoms, such as edema; proteinuria; seizures; abnormalities in blood coagulation and liver functions.

• Hypertension, Pulmonary

  increased vascular resistance in the pulmonary circulation, usually secondary to heart diseases or lung diseases.

• Hypertension, Renal

  persistent high blood pressure due to kidney diseases, such as those involving the renal parenchyma, the renal vasculature, or tumors that secrete renin.

• Hypertension, Renovascular

  hypertension due to renal artery obstruction or compression.

• Idiopathic Noncirrhotic Portal Hypertension

  portal hypertension without known risk factors for hypertension, e.g., hepatic cirrhosis and schistosomiasis. idiopathic noncirrhotic portal hypertension is most often associated with pathology in the portal system vasculature.

• Intra-Abdominal Hypertension

  pathological elevation of intra-abdominal pressure (>12 mm hg). it may develop as a result of sepsis; pancreatitis; capillary leaks, burns, or surgery. when the pressure is higher than 20 mm hg, often with end-organ dysfunction, it is referred to as abdominal compartment syndrome.

• Intracranial Hypertension

  increased pressure within the cranial vault. this may result from several conditions, including hydrocephalus; brain edema; intracranial masses; severe systemic hypertension; pseudotumor cerebri; and other disorders.

• Isolated Systolic Hypertension

  hypertension with elevated systolic and normal diastolic blood pressure. it is the most common subtype in the elderly and is related to vascular stiffness and atherosclerotic plaque buildup.

• Masked Hypertension

  phenomenon where increased blood pressure readings taken in non-clinical settings (e.g., home blood pressure monitoring) do not replicate in clinical settings.

• Ocular Hypertension

  a condition in which the intraocular pressure is elevated above normal and which may lead to glaucoma.

• Persistent Fetal Circulation Syndrome

  a syndrome of persistent pulmonary hypertension in the newborn infant (infant, newborn) without demonstrable heart diseases. this neonatal condition can be caused by severe pulmonary vasoconstriction (reactive type), hypertrophy of pulmonary arterial muscle (hypertrophic type), or abnormally developed pulmonary arterioles (hypoplastic type). the newborn patient exhibits cyanosis and acidosis due to the persistence of fetal circulatory pattern of right-to-left shunting of blood through a patent ductus arteriosus (ductus arteriosus, patent) and at times a patent foramen ovale (foramen ovale, patent).

• Pre-Eclampsia

  a complication of pregnancy, characterized by a complex of symptoms including maternal hypertension and proteinuria with or without pathological edema. symptoms may range between mild and severe. pre-eclampsia usually occurs after the 20th week of gestation, but may develop before this time in the presence of trophoblastic disease.

• Pseudotumor Cerebri

  a condition marked by raised intracranial pressure and characterized clinically by headaches; nausea; papilledema, peripheral constriction of the visual fields, transient visual obscurations, and pulsatile tinnitus. obesity is frequently associated with this condition, which primarily affects women between 20 and 44 years of age. chronic papilledema may lead to optic nerve injury (see optic nerve diseases) and visual loss (see blindness).

• Pulmonary Arterial Hypertension

  a progressive rare pulmonary disease characterized by high blood pressure in the pulmonary artery.

• Sinistral Portal Hypertension

  portal hypertension of the splenic vein due to occlusion caused by pancreatic pathology such as pancreatic pseudocyst and pancratic cancer. sinistral portal hypertension is associated with gastric varices and acute hematemesis.

• Varicose Ulcer

  skin breakdown or ulceration in the drainage area of a varicose vein, usually in the leg.

• White Coat Hypertension

  phenomenon where blood pressure readings are elevated only when taken in clinical settings.

• Pulmonary Circulation

  the circulation of the blood through the lungs.

• Renal Artery Obstruction

  narrowing or occlusion of the renal artery or arteries. it is due usually to atherosclerosis; fibromuscular dysplasia; thrombosis; embolism, or external pressure. the reduced renal perfusion can lead to renovascular hypertension (hypertension, renovascular).

• Pulmonary Artery

  the short wide vessel arising from the conus arteriosus of the right ventricle and conveying unaerated blood to the lungs.

• Varicose Veins

  enlarged and tortuous veins.

• Blood Pressure

  pressure of the blood on the arteries and other blood vessels.

New 2024 ICD-10-CM Code

I1A.0 is new to ICD-10-CM code set for the FY 2024, effective October 1, 2023. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2023. This is a new and revised code for the FY 2024 (October 1, 2023 - September 30, 2024).

I1A.0 is grouped with Diagnostic Related Groups - MS-DRG Mapping

Diagnostic Related Groups (DRGs) are a classification system used to group together diagnosis codes for the purpose of reimbursement and healthcare management. DRGs are used to standardize the way hospitals and other providers are paid for inpatient services. In this system patients are grouped together based on their principal diagnosis in areas referred to as Major Diagnostic Categories (MDC). Once a patient is assigned a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is often fixed and is meant to cover the cost of care for that patient. Reimbursement is also affected by the relative weight of a diagnostic related group based on the severity of a patient's illness and the associated cost of care during hospitalization.

Diagnostic related groups encourage healthcare providers to focus on quality and efficiency in patient care while managing costs effectively. The diagnosis code is present in the following groups for version MS-DRG V41.0 applicable from 10/01/2023 through 09/30/2024.

The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Replacement Code

I1A0 replaces the following previously assigned ICD-10-CM code(s):

• I10 - Essential (primary) hypertension
• I15.9 - Secondary hypertension, unspecified

Code History

• FY 2024 - Code Added, effective from 10/1/2023 through 9/30/2024