Valid for Submission
J18.9 is a billable diagnosis code used to specify a medical diagnosis of pneumonia, unspecified organism. The code J18.9 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.
The ICD-10-CM code J18.9 might also be used to specify conditions or terms like acute erosive gastritis, acute gastroenteritis, acute ulcerative gastroenteritis complicating pneumonia, atypical pneumonia, bilateral pneumonia , chronic pneumonia, etc.
Unspecified diagnosis codes like J18.9 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.
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 J18.9 are found in the index:
- - Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) - J18.9
- - atypical NEC - J18.9
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Acute erosive gastritis
- Acute gastroenteritis
- Acute ulcerative gastroenteritis complicating pneumonia
- Atypical pneumonia
- Bilateral pneumonia
- Chronic pneumonia
- Community acquired pneumonia
- Erosive gastritis
- Foreign body pneumonia
- Hemorrhagic pneumonia
- Hospital acquired pneumonia
- Infectious disease of lung
- Infective pneumonia
- Ornithosis with pneumonia
- Pleural effusion associated with pulmonary infection
- Pneumonia associated with AIDS
- Postoperative pneumonia
- Recurrent pneumonia
- Respiratory disorder associated with AIDS
- Unresolved pneumonia
Diagnostic Related Groups - MS-DRG Mapping
Convert J18.9 to ICD-9 Code
The General Equivalency Mapping (GEM) crosswalk indicates an approximate mapping between the ICD-10 code J18.9 its ICD-9 equivalent. The approximate mapping means there is not an exact match between the ICD-10 code and the ICD-9 code and the mapped code is not a precise representation of the original code.
Information for Patients
Also called: Bronchopneumonia
Pneumonia is an infection in one or both of the lungs. Many germs, such as bacteria, viruses, and fungi, can cause pneumonia. You can also get pneumonia by inhaling a liquid or chemical. People most at risk are older than 65 or younger than 2 years of age, or already have health problems.
Symptoms of pneumonia vary from mild to severe. See your doctor promptly if you
- Have a high fever
- Have shaking chills
- Have a cough with phlegm that doesn't improve or gets worse
- Develop shortness of breath with normal daily activities
- Have chest pain when you breathe or cough
- Feel suddenly worse after a cold or the flu
Your doctor will use your medical history, a physical exam, and lab tests to diagnose pneumonia. Treatment depends on what kind you have. If bacteria are the cause, antibiotics should help. If you have viral pneumonia, your doctor may prescribe an antiviral medicine to treat it.
Preventing pneumonia is always better than treating it. Vaccines are available to prevent pneumococcal pneumonia and the flu. Other preventive measures include washing your hands frequently and not smoking.
NIH: National Heart, Lung, and Blood Institute
- Aspiration pneumonia (Medical Encyclopedia)
- Atypical pneumonia (Medical Encyclopedia)
- Hospital-acquired pneumonia (Medical Encyclopedia)
- Mycoplasma pneumonia (Medical Encyclopedia)
- Pneumonia (Medical Encyclopedia)
- Pneumonia - adults - discharge (Medical Encyclopedia)
- Pneumonia - children - community acquired (Medical Encyclopedia)
- Pneumonia - children - discharge (Medical Encyclopedia)
- Viral pneumonia (Medical Encyclopedia)