J45.21
BillableMild intermittent asthma with (acute) exacerbation
Mild intermittent asthma with (acute) exacerbation
Coding Notes
Includes
Conditions included under this code
- 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
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •smoke inhalationT59.81
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •cystic fibrosisE84
- •asthma with chronic obstructive pulmonary diseaseJ44.89
- •chronic asthmatic (obstructive) bronchitisJ44.89
- •chronic obstructive asthmaJ44.89
- •other specified chronic obstructive pulmonary diseaseJ44.89
Use Additional Code
Additional codes that should follow this code
- code, where applicable, to identify:
- •exposure to environmental tobacco smokeZ77.22
- •exposure to tobacco smoke in the perinatal periodP96.81
- •history of tobacco dependenceZ87.891
- •occupational exposure to environmental tobacco smokeZ57.31
- •tobacco dependenceF17
- •tobacco useZ72.0
- code to identify:
- •eosinophilic asthmaJ82.83
Related Codes(2)
Related Conditions
Also Known As / Clinical Terms(13)
SNOMED CT
UMLS
Clinical Terms
- Intermittent asthma
- Acute intermittent asthma
- Intermittent allergic asthma
- Acute exacerbation of intermittent allergic asthma
- Mild Intermittent Asthma with Acute Exacerbation
- Exacerbation of intermittent asthma
Frequently Asked Questions
What is the ICD-10 code for mild intermittent asthma with (acute) exacerbation?
The ICD-10-CM code for mild intermittent asthma with (acute) exacerbation is J45.21. The full clinical description is "Mild intermittent asthma with (acute) exacerbation". J45.21 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code J45.21 mean?
ICD-10-CM code J45.21 represents “Mild intermittent asthma with (acute) exacerbation”. It is classified under Chapter 10: Diseases of the Respiratory System and is a billable/specific code that can be used on a claim.
Is J45.21 a billable code?
Yes, J45.21 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is J45.21 in?
J45.21 is in Chapter 10: Diseases of the Respiratory System (codes J00-J99).
What codes cannot be used with J45.21?
J45.21 has Excludes1 notes indicating codes that cannot be used together with it, including: bronchitis due to chemicals, gases, fumes and vapors (J68.0); detergent asthma (J69.8); miner's asthma (J60); and 2 more.
Are additional codes required with J45.21?
Yes, when using J45.21, also report: code, where applicable, to identify:; exposure to environmental tobacco smoke (Z77.22); exposure to tobacco smoke in the perinatal period (P96.81); history of tobacco dependence (Z87.891); occupational exposure to environmental tobacco smoke (Z57.31); tobacco dependence (F17.-); tobacco use (Z72.0); ; eosinophilic asthma (J82.83).
What SNOMED CT codes does J45.21 map to?
J45.21 maps to 4 SNOMED CT concepts: 10674791000119101, 425969006, 10674991000119104, 427603009. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for J45.21?
J45.21 is linked to 1 UMLS Concept Unique Identifier: C2887450. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does J45.21 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like mild intermittent asthma with (acute) exacerbation affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of J45.21?
There is no direct ICD-11 mapping available for J45.21 in the WHO crosswalk tables. This may mean the concept is classified differently in ICD-11. Use the ICD-10 to ICD-11 converter to search for related codes.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.