ICD-10 J45.20
Billable / SpecificMild intermittent asthma, uncomplicated
About ICD-10-CM J45.20
ICD-10-CM code J45.20 represents Mild intermittent asthma, uncomplicated. This is a billable/specific code in the Respiratory System chapter (block J45). The 2026 edition of ICD-10-CM J45.20 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under J45.20. Per CMS ICD-10-CM Tabular 2026.
- Mild intermittent asthma NOS
Medicare LCD Coverage for J45.20
Local Coverage Determinations (LCDs) from CMS MACs that list J45.20 as a covered diagnosis.
Showing top 10 of 575 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing J45.20.
4 Aetna
5 Medicare
CPT Codes Commonly Billed with J45.20
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 99203 New patient office visit — common complaints plus chronic conditions: HTN, diabetes, hyperlipidemia, asthma, GERD, back pain, migraine, tachycardia, prediabetes Primary Care
- 99204 New patient office visit — multiple chronic conditions: HTN, T2DM, hyperlipidemia, asthma, anxiety, depression, obesity, IBS, COPD, thyroid, anemia, CAD, sleep apnea, psoriasis, RA Primary Care
- 99213 Established patient — HTN follow-up, diabetes management, hyperlipidemia, asthma, anxiety, common complaints, back pain, GERD, migraine, acne, joint pain, prediabetes, obesity, anemia, hypothyroid, fatigue Primary Care
- 91035 Esophageal pH monitoring — GERD evaluation, heartburn, retrosternal chest pain, dysphagia, asthma with suspected GERD, chronic cough, Barrett Gastroenterology
- 94010 Spirometry — asthma all severity, COPD, COPD with exacerbation, dyspnea, wheezing, chronic cough, pulmonary disease, pulmonary fibrosis Pulmonology
- 94060 Spirometry pre and post bronchodilator — asthma diagnosis/monitoring, dyspnea, wheezing, chronic cough Pulmonology
- 95004 Allergy skin prick testing — allergic rhinitis, pollen allergy, animal allergy, food allergy, asthma, atopic dermatitis, anaphylaxis, urticaria, allergic contact dermatitis, allergic gastroenteritis Allergy
- 95115 Allergen immunotherapy injection — allergic rhinitis, asthma, food allergy, insect venom allergy, allergy status Allergy
- 95144 CMS LCD: Billing and Coding: Allergen Immunotherapy (AIT) with Subcutaneous Immunotherapy (SCIT) CMS LCD
- 95180 CMS LCD: Billing and Coding: Allergen Immunotherapy (AIT) with Subcutaneous Immunotherapy (SCIT) CMS LCD
Convert J45.20 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| J45.20 | 49300 | 10000 |
| J45.20 | 49310 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To J45.20
Other codes in section J40-J4A (Chronic lower respiratory diseases).
ICD-10 J45.20, Billing FAQ
Is ICD-10 code J45.20 billable? +
Yes, J45.20 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to J45.20? +
ICD-10 J45.20 includes: Mild intermittent asthma NOS.
What CPT codes are commonly billed with J45.20? +
Procedures frequently paired with J45.20 include: 99203, 99204, 99213, 91035, 94010.
What ICD-9 codes does J45.20 map to? +
Per CMS GEMs, J45.20 maps to ICD-9 codes: 49300, 49310. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on July 16, 2026.
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