Asthma ICD-10 codes
Start with the primary code, then move to a more specific related code when the documentation supports it.
J45.909 | Unspecified asthma, uncomplicated | ICD-10-CM |
J45.20 | Mild intermittent asthma, uncomplicated | ICD-10-CM |
J45.40 | Moderate persistent asthma, uncomplicated | ICD-10-CM |
J45.50 | Severe persistent asthma, uncomplicated | ICD-10-CM |
J45.901 | Unspecified asthma with (acute) exacerbation | ICD-10-CM |
J45.902 | Unspecified asthma with status asthmaticus | ICD-10-CM |
Document severity classification at least annually and code it: intermittent (J45.2-), mild persistent (J45.3-), moderate persistent (J45.4-), severe persistent (J45.5-). During an attack, the sixth character changes: -1 for exacerbation, -2 for status asthmaticus. Severity plus acuity together (e.g. J45.41, moderate persistent with exacerbation) is the fully specific code.
“Asthma review. Using salbutamol 4–5 times weekly, waking with cough twice weekly — consistent with moderate persistent asthma. Today wheezing with peak flow 65% of best after URTI. Prednisolone burst started; stepped up to medium-dose ICS/LABA.”
Paste a note or record audio. Notat’s FactsContext™ engine extracts the raw clinical facts first, then suggests codes from that context so you can inspect the evidence before using anything.
Exemples
Note clinique
Modifiez l'exemple ou collez votre propre note.
Système de codage
Codes extraits
Les preuves restent attachées pour examen.
3
I10ICD-10-CM
Essential (primary) hypertension
Preuve: “Chief Complaint Elevated and fluctuating blood pressure readings.”
E78.5ICD-10-CM
Hyperlipidemia, unspecified
Preuve: “2. Hyperlipidemia. Clinically stable on atorvastatin.”
M19.90ICD-10-CM
Unspecified osteoarthritis, unspecified site
Preuve: “3. Osteoarthritis. Symptoms stable. Continue conservative management with acetaminophen as needed.”
FactsContext extracts clinical facts first: diagnoses, symptoms, negatives, findings, test results, medications, and plan decisions.
The clinician can read and reuse the extracted medical context directly, independent of the generated note.
AI suggestions are not a substitute for clinician judgment, payer rules, local coding policy, or the official code set.
FAQ
When should I avoid J45.909?
Whenever severity is documented or documentable. Reliever frequency and night symptoms in the note support a persistent-severity code, which reflects the patient’s actual disease burden.
What is the difference between exacerbation and status asthmaticus?
An exacerbation is an acute worsening responding to treatment; status asthmaticus is a severe attack not responding to standard bronchodilator therapy — an emergency, coded with the -2 sixth character.
Can AI map my asthma note to the specific code?
Yes. Notat extracts reliever use, night waking, and acute findings as clinical facts and proposes the severity- and acuity-specific J45 code with its evidence.