ICD-10-CM Code J44.9

Chronic obstructive pulmonary disease, unspecified

Version 2020 Billable Code

Valid for Submission

J44.9 is a billable code used to specify a medical diagnosis of chronic obstructive pulmonary disease, unspecified. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code J44.9 might also be used to specify conditions or terms like airways obstruction irreversible, asthma with irreversible airway obstruction, asthma-chronic obstructive pulmonary disease overlap syndrome, asthmatic bronchitis, chronic asthmatic bronchitis, chronic bronchiolitis, etc

Short Description:Chronic obstructive pulmonary disease, unspecified
Long Description:Chronic obstructive pulmonary disease, 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 J44.9:

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.
  • Chronic obstructive airway disease NOS
  • Chronic obstructive lung disease NOS

Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • lung diseases due to external agents J60 J70

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 J44.9 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:

  • Airways obstruction irreversible
  • Asthma with irreversible airway obstruction
  • Asthma-chronic obstructive pulmonary disease overlap syndrome
  • Asthmatic bronchitis
  • Chronic asthmatic bronchitis
  • Chronic bronchiolitis
  • Chronic obliterative bronchiolitis
  • Chronic obstructive lung disease
  • Chronic obstructive pulmonary disease monitoring due
  • Emphysematous bronchitis
  • End stage chronic obstructive airways disease
  • Mild chronic obstructive pulmonary disease
  • Moderate chronic obstructive pulmonary disease
  • Obliterative bronchiolitis
  • Obstruction of bronchus
  • Pulmonary hypertension due to chronic obstructive pulmonary disease
  • Pulmonary hypertension due to lung disease and/or hypoxia
  • Pulmonary hypertension due to pulmonary disease with mixed restrictive and obstructive pattern
  • Severe chronic obstructive pulmonary disease
  • Subacute obliterative bronchiolitis
  • Tension pneumatocele

Clinical Information

  • PULMONARY DISEASE CHRONIC OBSTRUCTIVE-. a disease of chronic diffuse irreversible airflow obstruction. subcategories of copd include chronic bronchitis and pulmonary emphysema.

Diagnostic Related Groups

The ICD-10 code J44.9 is grouped in the following groups for version MS-DRG V37.0 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 09/30/2020.


Convert J44.9 to ICD-9

  • 491.20 - Obst chr bronc w/o exac (Approximate Flag)
  • 493.20 - Chronic obst asthma NOS (Approximate Flag)
  • 496 - Chr airway obstruct NEC (Approximate Flag)

Code Classification

  • Diseases of the respiratory system (J00–J99)
    • Chronic lower respiratory diseases (J40-J47)
      • Other chronic obstructive pulmonary disease (J44)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • 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

Information for Patients


COPD (chronic obstructive pulmonary disease) makes it hard for you to breathe. The two main types are chronic bronchitis and emphysema. The main cause of COPD is long-term exposure to substances that irritate and damage the lungs. This is usually cigarette smoke. Air pollution, chemical fumes, or dust can also cause it.

At first, COPD may cause no symptoms or only mild symptoms. As the disease gets worse, symptoms usually become more severe. They include

  • A cough that produces a lot of mucus
  • Shortness of breath, especially with physical activity
  • Wheezing
  • Chest tightness

Doctors use lung function tests, imaging tests, and blood tests to diagnose COPD. There is no cure. Treatments may relieve symptoms. They include medicines, oxygen therapy, surgery, or a lung transplant. Quitting smoking is the most important step you can take to treat COPD.

NIH: National Heart, Lung, and Blood Institute

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