2025 ICD-10-CM Diagnosis Code E66.89
Other obesity not elsewhere classified
- ICD-10-CM Code:
- E66.89
- ICD-10 Code for:
- Other obesity not elsewhere classified
- Is Billable?
- Yes - Valid for Submission
- Code Navigator:
E66.89 is a billable diagnosis code used to specify a medical diagnosis of other obesity not elsewhere classified. 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.
Approximate Synonyms
The following list of clinical terms are approximate synonyms, alternative descriptions, or common phrases that might be used by patients, healthcare providers, or medical coders to describe the same condition. These synonyms and related diagnosis terms are often used when searching for an ICD-10 code, especially when the exact medical terminology is unclear. Whether you're looking for lay terms, similar diagnosis names, or common language alternatives, this list can help guide you to the correct ICD-10 classification.
- Adult-onset obesity
- Android obesity
- Aniridia, ptosis, intellectual disability, familial obesity syndrome
- Brachydactyly of hand
- Buffalo obesity
- Central obesity
- Central obesity
- Central obesity
- Childhood obesity
- Childhood obesity
- Childhood obesity
- Clark Baraitser syndrome
- Congenital aniridia
- Congenital hypoplasia of penis
- Constitutional obesity
- Early-onset obesity, hyperphagia, severe developmental delay syndrome
- Endogenous obesity
- Excessive eating
- Familial obesity
- Finding of quantity of eating
- Genetic non-syndromic obesity
- Genetic non-syndromic obesity
- Gynecoid obesity
- Hydrocephalus with obesity and hypogonadism syndrome
- Hyperinsulinar obesity
- Hyperplastic obesity
- Hyperplastic-hypertrophic obesity
- Hypertrophic obesity
- Hypogonadal obesity
- Hypothalamic disorder of appetite
- Hypothalamic obesity
- MEHMO syndrome
- Morbid obesity
- MORM syndrome
- Obesity by adipocyte growth pattern
- Obesity by adipocyte growth pattern
- Obesity by adipocyte growth pattern
- Obesity by contributing factors
- Obesity by contributing factors
- Obesity by contributing factors
- Obesity by contributing factors
- Obesity by contributing factors
- Obesity by contributing factors
- Obesity by contributing factors
- Obesity by contributing factors
- Obesity caused by energy imbalance
- Obesity due to CEP19 deficiency
- Obesity due to melanocortin 4 receptor deficiency
- Obesity due to prohormone convertase I deficiency
- Obesity due to SIM1 deficiency
- Obesity of endocrine origin
- Obesity, colitis, hypothyroidism, cardiac hypertrophy, developmental delay syndrome
- Peripheral obesity
- Pulmonary hypertension associated with chronic underventilation
- Pulmonary hypertension due to lung disease and/or hypoxia
- Pulmonary hypertension with extreme obesity
- Rapid-onset childhood obesity, hypothalamic dysfunction, hypoventilation, autonomic dysregulation syndrome
- Severe early-onset obesity insulin resistance syndrome due to SH2B1 deficiency
- Severe obesity
- Severe obesity
- Severe obesity
- Short stature, brachydactyly, obesity, global developmental delay syndrome
- Syndromic X-linked intellectual disability type 7
Clinical Information
Morbid Obesity
an excess of body weight, normally defined as an individual with a body mass index greater than 35 or a body weight greater than one hundred percent of ideal body weight.
New 2025 ICD-10-CM Code
E66.89 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).
- - Obesity - E66.9
- - constitutional - E66.89
- - endocrine - E66.89
- - endogenous - E66.89
- - familial - E66.89
- - glandular - E66.89
- - specified type NEC - E66.89
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
E6689 replaces the following previously assigned ICD-10-CM code(s):
- E66.8 - Other obesity
