J16.0 – Chlamydial pneumonia

ICD-10-CM 2027 diagnosis code · Influenza and pneumonia

Billable code

ICD-10-CM code J16.0

Code: J16.0 (claims format: J160)
Description: Chlamydial pneumonia
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: J16

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

J16 – Pneumonia due to other infectious organisms, not elsewhere classified

Excludes1 (not coded here):

congenital pneumonia (P23.-)
ornithosis (A70)
pneumocystosis (B59)
pneumonia NOS (J18.9)

Code first:

, if applicable, associated influenza (J09.X1, J10.0-, J11.0-)

Code also:

, if applicable, any associated condition such as:
abscess (J85.1)
aspiration pneumonia (J69.-)

Block J09-J18

Excludes2 (not included here):

allergic or eosinophilic pneumonia (J82)
aspiration pneumonia NOS (J69.0)
meconium pneumonia (P24.01)
neonatal aspiration pneumonia (P24.-)
pneumonia due to solids and liquids (J69.-)
congenital pneumonia (P23.9)
lipid pneumonia (J69.1)
rheumatic pneumonia (I00)
ventilator associated pneumonia (J95.851)

Use additional code:

code, if applicable, to identify resistance to antimicrobial drugs (Z16.-)

Index terms for J16.0

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in J16

J16.8 – Pneumonia due to other specified infectious organismsBillable

Frequently asked questions

What is ICD-10 code J16.0?

J16.0 is the ICD-10-CM code for chlamydial pneumonia, in the block J09-J18 (Influenza and pneumonia).

Is J16.0 a billable code?

Yes. J16.0 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does J16.0 belong to?

It belongs to category J16 – Pneumonia due to other infectious organisms, not elsewhere classified.

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.