J18
Non-billablePneumonia, unspecified organism
Pneumonia, unspecified organism
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •smoke inhalationT59.81
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •allergic or eosinophilic pneumoniaJ82
- •aspiration pneumonia NOSJ69.0
- •meconium pneumoniaP24.01
- •neonatal aspiration pneumoniaP24
- •pneumonia due to solids and liquidsJ69
- •congenital pneumoniaP23.9
- •lipid pneumoniaJ69.1
- •rheumatic pneumoniaI00
- •ventilator associated pneumoniaJ95.851
- •abscess of lung with pneumoniaJ85.1
- •aspiration pneumonia due to anesthesia during labor and deliveryO74.0
- •aspiration pneumonia due to anesthesia during pregnancyO29
- •aspiration pneumonia due to anesthesia during puerperiumO89.0
- •aspiration pneumonia due to solids and liquidsJ69
- •pneumonitis due to external agentsJ67-J70
Code First
The underlying condition must be sequenced before this code
Use Additional Code
Additional codes that should follow this code
- code, where applicable, to identify:
- •exposure to environmental tobacco smokeZ77.22
- •exposure to tobacco smoke in the perinatal periodP96.81
- •history of tobacco dependenceZ87.891
- •occupational exposure to environmental tobacco smokeZ57.31
- •tobacco dependenceF17
- •tobacco useZ72.0
- •code, if applicable, to identify resistance to antimicrobial drugsZ16
Code Also
A second code may be required; sequencing depends on circumstances
- , if applicable, any associated condition such as:
- •aspiration pneumoniaJ69
Child Codes (5)
Related Conditions
ICD-11 Equivalents(1)
ICD-11 Equivalents
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Extracted Entities
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Also Known As / Clinical Terms(6)
Frequently Asked Questions
What is the ICD-10 code for pneumonia, unspecified organism?
The ICD-10-CM code for pneumonia, unspecified organism is J18. The full clinical description is "Pneumonia, unspecified organism". J18 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code J18 mean?
ICD-10-CM code J18 represents “Pneumonia, unspecified organism”. It is classified under Chapter 10: Diseases of the Respiratory System and is a non-billable header code. Use a more specific child code for billing purposes.
Is J18 a billable code?
No, J18 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 5 child codes under J18.
What chapter is J18 in?
J18 is in Chapter 10: Diseases of the Respiratory System (codes J00-J99).
What codes cannot be used with J18?
J18 has Excludes1 notes indicating codes that cannot be used together with it, including: congenital pneumonia (P23.0); drug-induced interstitial lung disorder (J70.2-J70.4); interstitial pneumonia NOS (J84.9); and 3 more.
What are the subcategories under J18?
J18 has 5 child codes, including: J18.0 (Bronchopneumonia, unspecified organism), J18.1 (Lobar pneumonia, unspecified organism), J18.2 (Hypostatic pneumonia, unspecified organism), J18.8 (Other pneumonia, unspecified organism), and 1 more.
Are additional codes required with J18?
Yes, when using J18, also report: code, where applicable, to identify:; exposure to environmental tobacco smoke (Z77.22); exposure to tobacco smoke in the perinatal period (P96.81); history of tobacco dependence (Z87.891); occupational exposure to environmental tobacco smoke (Z57.31); tobacco dependence (F17.-); tobacco use (Z72.0); code, if applicable, to identify resistance to antimicrobial drugs (Z16.-).
What are the UMLS CUIs for J18?
J18 is linked to 1 UMLS Concept Unique Identifier: C0339951. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does J18 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like pneumonia, unspecified organism affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of J18?
J18 maps to the ICD-11 code: CA40.Z (Pneumonia, organism unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.