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.
Ejemplos
Nota clínica
Edite el ejemplo o pegue su propia nota.
Sistema de codificación
Códigos extraídos
La evidencia se mantiene adjunta para su revisión.
3
I10ICD-10-CM
Essential (primary) hypertension
Evidencia: “Chief Complaint Elevated and fluctuating blood pressure readings.”
E78.5ICD-10-CM
Hyperlipidemia, unspecified
Evidencia: “2. Hyperlipidemia. Clinically stable on atorvastatin.”
M19.90ICD-10-CM
Unspecified osteoarthritis, unspecified site
Evidencia: “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.