J16.0 ICD-10-CA code: Chlamydial pneumonia
J16.0 is the ICD-10-CA code for “Chlamydial pneumonia” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
J16.0Chlamydial pneumonia
ICD-10-CA · Canada · Also written J160
Index terms
Entries in CIHI’s alphabetical index that lead to J16.0. Searching the index by the condition the note names is how coders reach this code.
- Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved), chlamydial
- Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved), in (due to), Chlamydia
Notes for J16.0
As CIHI prints them, with any note J16.0 takes from the headings above it.
Use additional code
Add a code for this detail when the note documents it.
- Use additional code (U82-U84) to identify resistance to antimicrobial drugs.From J09-J18 Influenza and pneumonia
Excludes
Conditions classified elsewhere.
- Ornithosis (A70)pneumocystosis (B48.5)pneumonia:• NOS (J18.9)• congenital (P23.-)From J16 Pneumonia due to other infectious organisms, not elsewhere classified
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 10: Diseases of the respiratory system (J00-J99)
Note
- When a respiratory condition is described as occurring in more than one site and is not specifically indexed, it should be classified to the lower anatomic site (e.g., tracheobronchitis to bronchitis in J40).From Chapter 10: Diseases of the respiratory system (J00-J99)
Where J16.0 sits
- 1ChapterChapter 10: Diseases of the respiratory system (J00-J99)
- 2Block J09-J18Influenza and pneumonia
- 3Category J16Pneumonia due to other infectious organisms, not elsewhere classified
- 4Valid code J16.0Chlamydial pneumonia
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code J16.0 mean?
J16.0 is the ICD-10-CA code for “Chlamydial pneumonia” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is J16.0 in ICD-10-CA?
J16.0 sits under J16 Pneumonia due to other infectious organisms, not elsewhere classified, within J09-J18 Influenza and pneumonia, within Chapter 10: Diseases of the respiratory system (J00-J99).
What coding notes apply to J16.0?
ICD-10-CA lists Excludes, Use additional code, Note notes for J16.0, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.