ICD-10-CM J45.90 is the diagnosis code for Unspecified asthma. This code falls under the section "Chronic lower respiratory diseases" within Chapter 10 — Diseases of the respiratory system (J00-J99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Understanding where J45.90 sits in the ICD-10-CM classification helps ensure proper coding:
No, J45.90 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
J45.90 is the ICD-10-CM diagnosis code for "Unspecified asthma". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of J45.90 is J45.9 ("Other and unspecified asthma"). J45.90 provides a more specific classification within this category.
J45.90 is located in Section J40-J4A — "Chronic lower respiratory diseases" within Chapter 10 of the ICD-10-CM Tabular List.
J45.90 has 1918 sub-code(s) that provide more specific detail: A00, A01, A02, A03, A04 and more.
Use J45.90 when the patients documented diagnosis matches "Unspecified asthma" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Unspecified asthma is J45.90.
No, J45.90 is non-billable. Use a more specific sub-code for primary diagnosis billing.
J45.90 is in Chapter 10 of the ICD-10-CM Tabular List.
Yes, J45.90 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.