ICD-10-CM Code I27.20

Pulmonary hypertension, unspecified

Version 2021 Billable Code

Valid for Submission

I27.20 is a billable code used to specify a medical diagnosis of pulmonary hypertension, unspecified. The code is valid for the fiscal year 2021 for the submission of HIPAA-covered transactions. The ICD-10-CM code I27.20 might also be used to specify conditions or terms like episodic pulmonary hypertension, hyperuricemia, pulmonary hypertension, renal failure, alkalosis syndrome, precapillary pulmonary hypertension, progressive pulmonary hypertension, pulmonary arterial hypertension, pulmonary hypertension, etc

Short Description:Pulmonary hypertension, unspecified
Long Description:Pulmonary hypertension, unspecified

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code I27.20:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Pulmonary hypertension NOS

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code I27.20 are found in the index:


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

  • Episodic pulmonary hypertension
  • Hyperuricemia, pulmonary hypertension, renal failure, alkalosis syndrome
  • Precapillary pulmonary hypertension
  • Progressive pulmonary hypertension
  • Pulmonary arterial hypertension
  • Pulmonary hypertension
  • Pulmonary hypertensive venous disease

Clinical Information

  • HYPERTENSION PULMONARY-. increased vascular resistance in the pulmonary circulation usually secondary to heart diseases or lung diseases.
  • 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.
  • FAMILIAL PRIMARY PULMONARY HYPERTENSION-. familial or idiopathic hypertension in the pulmonary circulation which is not secondary to other disease.

Diagnostic Related Groups

The ICD-10 code I27.20 is grouped in the following groups for version MS-DRG V38.0 What are 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).
applicable from 10/01/2020 through 09/30/2021.


Replacement Code

I2720 replaces the following previously assigned ICD-10 code(s):

  • I27.2 - Other secondary pulmonary hypertension

Convert I27.20 to ICD-9

  • 416.8 - Chr pulmon heart dis NEC (Approximate Flag)

Code Classification

  • Diseases of the circulatory system (I00–I99)
    • Pulmonary heart disease and diseases of pulmonary circulation (I26-I28)
      • Other pulmonary heart diseases (I27)

Code History

  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021

Information for Patients

Pulmonary Hypertension

Also called: Pulmonary arterial hypertension

Pulmonary hypertension (PH) is high blood pressure in the arteries to your lungs. It is a serious condition. If you have it, the blood vessels that carry blood from your heart to your lungs become hard and narrow. Your heart has to work harder to pump the blood through. Over time, your heart weakens and cannot do its job and you can develop heart failure.

Symptoms of PH include

  • Shortness of breath during routine activity, such as climbing two flights of stairs
  • Tiredness
  • Chest pain
  • A racing heartbeat
  • Pain on the upper right side of the abdomen
  • Decreased appetite

As PH worsens, you may find it hard to do any physical activities.

There are two main kinds of PH. One runs in families or appears for no known reason. The other kind is related to another condition, usually heart or lung disease.

There is no cure for PH. Treatments can control symptoms. They involve treating the heart or lung disease, medicines, oxygen, and sometimes lung transplantation.

NIH: National Heart, Lung, and Blood Institute

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