Billable / Specific Code
ICD-10-CM D80.5 is the diagnosis code for Immunodeficiency with increased immunoglobulin M [IgM]. This code falls under the section "Certain disorders involving the immune mechanism" within Chapter 3 — Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism (D50-D89). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where D80.5 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, D80.5 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
D80.5 is the ICD-10-CM diagnosis code for "Immunodeficiency with increased immunoglobulin M [IgM]". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of D80.5 is D80 ("Immunodeficiency with predominantly antibody defects"). D80.5 provides a more specific classification within this category.
D80.5 is located in Section D80-D89 — "Certain disorders involving the immune mechanism" within Chapter 3 of the ICD-10-CM Tabular List.
Use D80.5 when the patients documented diagnosis matches "Immunodeficiency with increased immunoglobulin M [IgM]" 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 Immunodeficiency with increased immunoglobulin M [IgM] is D80.5.
Yes, D80.5 can be used as a primary diagnosis code since it is billable and specific.
D80.5 is in Chapter 3 of the ICD-10-CM Tabular List.
Yes, D80.5 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.