J21.1 ICD-10-CA code: Acute bronchiolitis due to human metapneumovirus
J21.1 is the ICD-10-CA code for “Acute bronchiolitis due to human metapneumovirus” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
J21.1Acute bronchiolitis due to human metapneumovirus
Short description: Acut bronchiolitis human metapneumovirus
ICD-10-CA · Canada · Also written J211
Index terms
Entries in CIHI’s alphabetical index that lead to J21.1. Searching the index by the condition the note names is how coders reach this code.
- Human, metapneumovirus, resulting in, bronchiolitis
- Bronchiolitis (acute) (infective) (subacute), due to, human metapneumovirus
Notes for J21.1
As CIHI prints them, with any note J21.1 takes from the headings above it.
Includes
- With bronchospasmFrom J21 Acute bronchiolitis
Excludes
Conditions classified elsewhere.
- Chronic obstructive pulmonary disease with acute:• exacerbation NOS (J44.1)• lower respiratory infection (J44.0)From J20-J22 Other acute lower respiratory infections
- 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 J21.1 sits
- 1ChapterChapter 10: Diseases of the respiratory system (J00-J99)
- 2Block J20-J22Other acute lower respiratory infections
- 3Category J21Acute bronchiolitis
- 4Valid code J21.1Acute bronchiolitis due to human metapneumovirus
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 J21.1 mean?
J21.1 is the ICD-10-CA code for “Acute bronchiolitis due to human metapneumovirus” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is J21.1 in ICD-10-CA?
J21.1 sits under J21 Acute bronchiolitis, within J20-J22 Other acute lower respiratory infections, within Chapter 10: Diseases of the respiratory system (J00-J99).
What coding notes apply to J21.1?
ICD-10-CA lists Includes, Excludes, Note notes for J21.1, 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.