Is J45.901 a billable ICD-10-CM code?

Yes. J45.901 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does J45.901 sit in the tabular list?

Diseases of the respiratory system (J00-J99), in the block Chronic lower respiratory diseases (J40-J4A).

J45.901

J45.901 — Unspecified asthma with (acute) exacerbation

Billable / specific codeICD-10-CM

J45.901 is a billable, specific ICD-10-CM code for unspecified asthma with (acute) exacerbation. It is valid for submission on a claim.

Risk adjustment

J45.901 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

J45.901 is named in 49 Medicare coverage policies — 47 listing it as supporting medical necessity, and 2 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

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

How J45.901 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to J45.901.

Asthma, asthmatic›with›exacerbation(acute)
Asthma, asthmatic›allergic extrinsic›with›exacerbation(acute)
Asthma, asthmatic›childhood›with›exacerbation(acute)
Asthma, asthmatic›late-onset›with›exacerbation(acute)
Asthma, asthmatic›mixed›with›exacerbation(acute)
Asthma, asthmatic›nonallergic›with›exacerbation(acute)
Bronchitis›allergic›with›exacerbation(acute)
Dyspnea›asthmatic›with›exacerbation(acute)
Fever›hay›with asthma›with›exacerbation(acute)
Rhinitis›allergic›with asthma›with›exacerbation(acute)
Dyspnea›asthmatic›with›bronchitis›with›exacerbation(acute)
Obstruction, obstructed, obstructive›airway›with›asthma›with›exacerbation(acute)

Related codes at this level

Codes that share J45.90. If J45.901 is not quite right, the correct code is usually one of these.

Questions about J45.901

Is J45.901 a billable ICD-10-CM code?: Yes. J45.901 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does J45.901 sit in the tabular list?: Diseases of the respiratory system (J00-J99), in the block Chronic lower respiratory diseases (J40-J4A).