2026 ICD-10-CM Diagnosis Code I1AOther hypertension
ICD-10-CM I1A
I1A is a non-billable ICD-10-CM category code for other hypertension, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I1A.0.
Code Identity
ICD-10-CM Code
I1A
Billable Status
No — Non-Billable Category
Code Describes
Other hypertension
Chapter
I10-I1A
Hypertensive diseases
Code Classification
Specific Coding for Other hypertensionOverview
Non-specific codes like I1A require more characters. Use one of these billable codes instead:
Use I1A.0 for Resistant hypertension
Clinical InformationClinical
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: 145500Familial 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 people 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.
Patient EducationClinical
High Blood Pressure
Blood pressure is the force of your blood pushing against the walls of your arteries. Each time your heart beats, it pumps blood into the arteries. Your blood pressure is highest when your heart beats, pumping the blood. This is called systolic pressure. When your heart is at rest, between beats, your blood pressure falls.
The full article covers:
- What is blood pressure?
- How is high blood pressure diagnosed?
- What are the different types of high blood pressure?
- Why do I need to worry about high blood pressure?
- What are the treatments for high blood pressure?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code HistoryHistory
FY 2024AddedAdded to the ICD-10-CM code setEffective October 1, 2023.
FY 2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.
Questions About I1AOverview
Is I1A (Other hypertension) a billable code?
No. This is a category header that groups the codes for other hypertension, and headers cannot be submitted on claims. Claims for other hypertension need a more specific code from this category, such as I1A.0.
