Non-Billable / Non-Specific Code
ICD-10-CM D89 is the diagnosis code for Other disorders involving the immune mechanism, not elsewhere classified. This code falls under the section "Certain disorders involving the immune mechanism" within Chapter 3 â Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89). 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.
The following conditions should never be coded at the same time as D89. They are mutually exclusive:
The following conditions are not included in D89. If the patient has both, code each condition separately:
Understanding where D89 sits in the ICD-10-CM classification helps ensure proper coding:
No, D89 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
D89 is the ICD-10-CM diagnosis code for "Other disorders involving the immune mechanism, not elsewhere classified". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
D89 is located in Section D80-D89 â "Certain disorders involving the immune mechanism" within Chapter 3 of the ICD-10-CM Tabular List.
D89 has 7 sub-code(s) that provide more specific detail: D89.0, D89.1, D89.2, D89.3, D89.4 and more.
Use D89 when the patients documented diagnosis matches "Other disorders involving the immune mechanism, not elsewhere classified" 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 Other disorders involving the immune mechanism, not elsewhere classified is D89.
No, D89 is non-billable. Use a more specific sub-code for primary diagnosis billing.
D89 is in Chapter 3 of the ICD-10-CM Tabular List.
Type 1 Excludes for D89 include: hyperglobulinemia NOS (R77.1); monoclonal gammopathy (of undetermined significance) (D47.2).
Yes, D89 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.