J18.9 – Pneumonia, unspecified organism
ICD-10-CM 2027 diagnosis code · Influenza and pneumonia
ICD-10-CM code
J18.9
- Code
J18.9(claims format:J189)- Description
- Pneumonia, unspecified organism
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 10. Diseases of the respiratory system (J00-J99)
- Block
- J09-J18 Influenza and pneumonia
- Parent codes
- J18
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
J18 – Pneumonia, unspecified organism
Excludes1 (not coded here):
Excludes2 (not included here):
- abscess of lung with pneumonia (J85.1)
- aspiration pneumonia due to anesthesia during labor and delivery (O74.0)
- aspiration pneumonia due to anesthesia during pregnancy (O29)
- aspiration pneumonia due to anesthesia during puerperium (O89.0)
- aspiration pneumonia due to solids and liquids (J69.-)
- aspiration pneumonia NOS (J69.0)
- lipid pneumonia (J69.1)
- pneumonitis due to external agents (J67-J70)
Code also:
- , if applicable, any associated condition such as:
- aspiration pneumonia (J69.-)
Block J09-J18
Excludes2 (not included here):
Use additional code:
- code, if applicable, to identify resistance to antimicrobial drugs (Z16.-)
Index terms for J18.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in J18
Frequently asked questions
What is ICD-10 code J18.9?
J18.9 is the ICD-10-CM code for pneumonia, unspecified organism, in the block J09-J18 (Influenza and pneumonia).
Is J18.9 a billable code?
Yes. J18.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does J18.9 belong to?
It belongs to category J18 – Pneumonia, unspecified organism.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.