J45.1 ICD-10-CA subcategory: Nonallergic asthma
J45.1 isn’t a code on its own. Choose one of the 2 codes beneath it, the one the documentation supports.
Official description
J45.1Nonallergic asthma
ICD-10-CA · Canada · Also written J451
Codes in J45.1
J45.1 isn’t a code on its own. Open the code that matches what the note documents.
Notes for J45.1
As CIHI prints them, with any note J45.1 takes from the headings above it.
Includes
- Idiosyncratic asthmaintrinsic nonallergic asthma
Excludes
Conditions classified elsewhere.
- Chronic:• asthmatic (obstructive) bronchitis (J44.-)• obstructive asthma (J44.-)eosinophilic asthma (J82)lung diseases due to external agents (J60-J70)From J45 Asthma
- Cystic fibrosis (E84.-)respiratory infection NOS (J98.7)From J40-J47 Chronic lower respiratory diseases
- 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 J45.1 sits
- 1ChapterChapter 10: Diseases of the respiratory system (J00-J99)
- 2Block J40-J47Chronic lower respiratory diseases
- 3Category J45Asthma
- 4Subcategory J45.1Nonallergic asthma
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
Is J45.1 a valid ICD-10-CA code?
No. J45.1 (Nonallergic asthma) is a subcategory heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 2 codes; record the one the documentation supports.
Where is J45.1 in ICD-10-CA?
J45.1 sits under J45 Asthma, within J40-J47 Chronic lower respiratory diseases, within Chapter 10: Diseases of the respiratory system (J00-J99).
What coding notes apply to J45.1?
ICD-10-CA lists Includes, Excludes, Note notes for J45.1, 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.