ICD-10-CM E66.811 is the diagnosis code for Obesity, class 1. This code falls under the section "Overweight, obesity and other hyperalimentation" within Chapter 4 — Endocrine, nutritional and metabolic diseases (E00-E89). 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 E66.811 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, E66.811 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
E66.811 is the ICD-10-CM diagnosis code for "Obesity, class 1". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of E66.811 is E66.81 ("Obesity class"). E66.811 provides a more specific classification within this category.
E66.811 is located in Section E65-E68 — "Overweight, obesity and other hyperalimentation" within Chapter 4 of the ICD-10-CM Tabular List.
Use E66.811 when the patients documented diagnosis matches "Obesity, class 1" 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 Obesity, class 1 is E66.811.
Yes, E66.811 can be used as a primary diagnosis code since it is billable and specific.
E66.811 is in Chapter 4 of the ICD-10-CM Tabular List.
Yes, E66.811 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.