2027 ICD-10-CM Diagnosis Code E66.3Overweight
ICD-10-CM Codes›E00–E89›E65-E68›E66
- Billable — Valid for Submission
- Chronic Condition
E66.3 is a billable ICD-10-CM diagnosis code for overweight. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 640 through 641. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified nutritional and metabolic disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Body mass index 25-29 - overweight
- Body weight above reference range
- Developmental delay, overweight, facial dysmorphism, behavioral abnormalities syndrome
- Fetal disorder due to maternal overweight
- Increased body mass index
- Overweight
- Overweight in adulthood with body mass index of 25 or more but less than 30
- Overweight in childhood
- Peripheral neuropathy due to overweight
- Speech delay
- X-linked intellectual disability, short stature, overweight syndrome
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to E66.3: its own notes plus those printed at E66 and Chapter 4. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Code First
The underlying condition named in the note is sequenced before this code.
Use Additional Code
Add a second code, after this one, to fully describe the condition.
Notes
General instructions on how these codes are used.
- All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name E66.3, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming E66.3: they are not reported together with it, unless the two conditions are unrelated.
Code First 1
These codes say to code first a condition named in the note, and E66.3 is one of the conditions named.
Use Additional Code 2
These codes say to use an additional code from the note, and E66.3 is one of the codes named.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Overweight E66.3
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Overweight
a status with body weight that is above certain standards. in the scale of body mass index, overweight is defined as having a bmi of 25.0-29.9 kg/m2. overweight may or may not be due to increases in body fat (adipose tissue), hence overweight does not equal over fat.
Patient EducationClinical
Body Weight
Body weight is the total mass of your body. Keeping track of your weight is one way to check for changes in your health, but it can't tell you the whole story. That's because your weight includes muscle, bone, fat, and water. Also, everyday factors can play a role in your weight, such as your:
The full article covers:
- What is body weight?
- What factors help determine a healthy body weight?
- What are body weight ranges?
- What if I have a sudden gain or loss of weight?
- How can I maintain a healthy body weight?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert E66.3 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About E66.3Overview
What is the ICD-10 code for overweight?
The ICD-10-CM code for overweight is E66.3 (sometimes written as E663). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is E66.3 (Overweight and obesity) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report overweight on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does E66.3 group to?
When overweight is the principal diagnosis on an inpatient stay, it groups to MS-DRG 641, 640, with relative weights from 0.7864 to 1.3392 depending on complications. Higher weights mean higher Medicare reimbursement.
Does E66.3 need an additional code?
When the condition applies, yes. The Use Additional Code note at E66, which applies to E66.3, reads: code to identify body mass index (BMI), if known, for adults (Z68.1-Z68.45) or pediatrics (Z68.5-). The additional code is reported after E66.3.
What is the ICD-9 equivalent of E66.3?
Under the General Equivalence Mappings, overweight converts to ICD-9-CM 278.02 (overweight). The mapping is a direct match.
