U.S. ICD-10-CM · FY 2027

J45 ICD-10-CM Code: Asthma

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

J45

Asthma

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where J45 sits

  1. 1

    Chapter 10

    Diseases of the respiratory system (J00-J99)

  2. 2

    Section

    Chronic lower respiratory diseases (J40-J4B)

  3. 3

    Category J45

    Asthma

  4. 4

    Code J45

    Asthma

More specific choices

Codes under J45

J45 is a non-billable category. Choose the child code that best matches the documented diagnosis.

J45.2

Mild intermittent asthma

J45.3

Mild persistent asthma

J45.4

Moderate persistent asthma

J45.5

Severe persistent asthma

J45.9

Other and unspecified asthma

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for J45.

Code first

No “code first” instruction is listed for J45.

Use additional code

  • code to identify:
  • eosinophilic asthma (J82.83)
  • 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)

Excludes1

Conditions that should not be reported together with this code.

  • detergent asthma (J69.8)
  • miner's asthma (J60)
  • wheezing NOS (R06.2)
  • wood asthma (J67.8)

Excludes2

Conditions not included here that may be reported separately when present.

  • 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)

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code J45 mean?

J45 is the FY 2027 U.S. ICD-10-CM code for “Asthma.”

Is J45 a billable or specific ICD-10-CM code?

No. J45 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is J45 located in ICD-10-CM?

J45 is listed in Chapter 10, Diseases of the respiratory system (J00-J99), within Chronic lower respiratory diseases (J40-J4B) (J40–J4B), under category J45, Asthma.

What coding notes are listed for J45?

No inclusion terms are listed for J45 in this reference record. No code-first instruction is listed. Additional-code instructions: code to identify:; eosinophilic asthma (J82.83); 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). Excludes1 notes: detergent asthma (J69.8); miner's asthma (J60); wheezing NOS (R06.2); wood asthma (J67.8). Excludes2 notes: 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).

Ready to transform your clinical documentation?

Join Vero and see how effortless documentation can be.

Try for free

  • No credit card required

  • Cancel anytime