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J45.909

J45.909: Unspecified asthma, uncomplicated

Billable / specific codeICD-10-CM

J45.909 is a billable, specific ICD-10-CM code for unspecified asthma, uncomplicated. It is valid for submission on a claim.

Check J45.909 with the rest of the claim: free scrubber

Excludes2: not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

  • lung diseases due to external agents (J60-J70)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Asthma NOS

Excludes1 inherited from the categories above J45.909

A category’s note binds every code beneath it.

Written on J45: Asthma

Excludes2 inherited from the categories above J45.909

Not part of this code, but both may be coded when both are present.

Written on J45: Asthma

  • asthma with chronic obstructive pulmonary disease (J44.89)
  • chronic asthmatic (obstructive) bronchitis (J44.89)
  • chronic obstructive asthma (J44.89)
  • other specified chronic obstructive pulmonary disease (J44.89)

Other codes that can never be billed with J45.909

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • J30Vasomotor and allergic rhinitis
  • J40Bronchitis, not specified as acute or chronic
  • J98.01Acute bronchospasm
  • R06.2Wheezing

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

J45.909 is named in 30 Medicare coverage policies: 28 listing it as supporting medical necessity, and 2 listing it as NOT covered. Which one applies depends on your Medicare contractor.

  • A56566Billing and Coding: Outpatient Physical and Occupational Therapy Servicesnot covered
  • A57067Billing and Coding: Outpatient Physical and Occupational Therapy Servicesnot covered
  • A52466Nebulizers - Policy Article
  • A53064Billing and Coding: Outpatient Occupational Therapy

Alphabetic index entries that lead here

  • Asthma, asthmatic(bronchial) (catarrh) (spasmodic)
  • IgE asthma
  • Asthma, asthmatic›allergic extrinsic
  • Asthma, asthmatic›childhood
  • Asthma, asthmatic›late-onset
  • Asthma, asthmatic›mixed
  • Asthma, asthmatic›nonallergic(intrinsic)
  • Asthma, asthmatic›predominantly allergic
  • Bronchitis›allergic(acute)
  • Dyspnea›asthmatic(bronchial)
  • Fever›hay›with asthma(bronchial)
  • Rhinitis›allergic›with asthma

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under J45.90

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.