What is the ICD-10-CM code for asthma?

The primary ICD-10-CM code for asthma is J45.909 (Unspecified asthma, uncomplicated). There are 19 billable asthma codes in FY2027, covering different types and underlying causes.

How many ICD-10-CM codes are there for asthma?

There are 27 ICD-10-CM codes for asthma in the FY2027 tabular list, of which 19 are billable. These codes fall under Chapter 10 of the ICD-10-CM classification.

Which chapter covers asthma in ICD-10-CM?

Asthma codes are classified in Chapter 10 of the ICD-10-CM tabular list: J00–J99 (Diseases of the Respiratory System).

Asthma ICD-10-CM codes

ICD-10-CM codes for asthma classified by severity, including mild intermittent, mild persistent, moderate persistent, and severe persistent asthma.

27 codes, 19 billable. FY2027, valid from October 1, 2026. In chapter 10: Diseases of the Respiratory System.

How to code Asthma

Asthma codes in category J45 are built on documented severity: mild intermittent (J45.2x), mild persistent (J45.3x), moderate persistent (J45.4x), and severe persistent (J45.5x). J45.909 (unspecified, uncomplicated) applies when severity is not documented.

The final character distinguishes uncomplicated asthma from asthma with acute exacerbation and asthma with status asthmaticus. Status asthmaticus is a life-threatening failure to respond to treatment and takes precedence over exacerbation when both are documented.

Query the provider for severity when it is missing: unspecified codes are a frequent target of payer reviews for this condition.

All Asthma codes

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