J45.21

Mild intermittent asthma with (acute) exacerbation

Billable / specific

J45.21 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

allergic (predominantly) asthma
allergic bronchitis NOS
allergic rhinitis with asthma
atopic asthma
extrinsic allergic asthma
hay fever with asthma
idiosyncratic asthma
intrinsic nonallergic asthma
nonallergic asthma
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).

Not coded here — never report together with this code.

bronchitis due to chemicals, gases, fumes and vapors (J68.0) (from J45)
detergent asthma (J69.8) (from J45)
miner's asthma (J60) (from J45)
wheezing NOS (R06.2) (from J45)
wood asthma (J67.8) (from J45)

Not included here — may be reported together when both conditions exist.

certain conditions originating in the perinatal period (P04-P96) (from J45)
certain infectious and parasitic diseases (A00-B99) (from J45)
complications of pregnancy, childbirth and the puerperium (O00-O9A) (from J45)
congenital malformations, deformations and chromosomal abnormalities (Q00-Q99) (from J45)
endocrine, nutritional and metabolic diseases (E00-E88) (from J45)
injury, poisoning and certain other consequences of external causes (S00-T88) (from J45)
neoplasms (C00-D49) (from J45)
smoke inhalation (T59.81-) (from J45)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94) (from J45)
cystic fibrosis (E84.-) (from J45)
asthma with chronic obstructive pulmonary disease (J44.89) (from J45)
chronic asthmatic (obstructive) bronchitis (J44.89) (from J45)
chronic obstructive asthma (J44.89) (from J45)
other specified chronic obstructive pulmonary disease (J44.89) (from J45)

Add a code to identify the following, if applicable.

code, where applicable, to identify: (from J45)
exposure to environmental tobacco smoke (Z77.22) (from J45)
exposure to tobacco smoke in the perinatal period (P96.81) (from J45)
history of tobacco dependence (Z87.891) (from J45)
occupational exposure to environmental tobacco smoke (Z57.31) (from J45)
tobacco dependence (F17.-) (from J45)
tobacco use (Z72.0) (from J45)
code to identify: (from J45)
eosinophilic asthma (J82.83) (from J45)
exposure to environmental tobacco smoke (Z77.22) (from J45)
exposure to tobacco smoke in the perinatal period (P96.81) (from J45)
history of tobacco dependence (Z87.891) (from J45)
occupational exposure to environmental tobacco smoke (Z57.31) (from J45)
tobacco dependence (F17.-) (from J45)
tobacco use (Z72.0) (from J45)