2025 ICD-10-CM Diagnosis Code E66.811
Obesity, class 1
- ICD-10-CM Code:
- E66.811
- ICD-10 Code for:
- Obesity, class 1
- Is Billable?
- Yes - Valid for Submission
- Code Navigator:
E66.811 is a billable diagnosis code used to specify a medical diagnosis of obesity, class 1. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2024 through September 30, 2025.
This code is not usually sufficient justification for admission to an acute care hospital when used as a principal diagnosis.
New 2025 ICD-10-CM Code
E66.811 is new to ICD-10-CM code set for the FY 2025, effective October 1, 2024. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2024. This is a new and revised code for the FY 2025 (October 1, 2024 - September 30, 2025).
Index to Diseases and Injuries References
The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).
Code Edits
The Medicare Code Editor (MCE) detects errors and inconsistencies in ICD-10-CM diagnosis coding that can affect Medicare claim validity. These Medicare code edits help medical coders and billing professionals determine when a diagnosis code is not appropriate as a principal diagnosis, does not meet coverage criteria. Use this list to verify whether a code is valid for Medicare billing and to avoid claim rejections or denials due to diagnosis coding issues.
Questionable admission codes
Some diagnoses are not usually sufficient justification for admission to an acute care hospital. For example, if a patient is given code R030 for elevated blood pressure reading, without diagnosis of hypertension, then the patient would have a questionable admission, since elevated blood pressure reading is not normally sufficient justification for admission to a hospital. The following list contains diagnosis codes identified as questionable admission when used.
Replacement Code
E66811 replaces the following previously assigned ICD-10-CM code(s):
- E66.8 - Other obesity
