Cachexia (R64) ICD-10-CM
The R64 code range covers cachexia with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the R64 Range 1 codes · 1 billable
- R64 Cachexia
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the R64 range.
Cachexia
General ill health, malnutrition, and weight loss, usually associated with chronic disease.
About the R64 Code Range
The ICD-10 code R64 is used specifically to identify cachexia, a condition characterized by severe weight loss and muscle wasting related to chronic illnesses. This code helps healthcare providers document and treat the systemic loss of body mass not explained by simple malnutrition.
Cachexia includes various forms such as muscle cachexia, cardiac cachexia, and the AIDS wasting syndrome, reflecting its association with serious diseases like acquired immunodeficiency syndrome. The condition is marked by abnormal weight loss, fat distribution changes, and often severe tissue wasting, which distinguishes it from normal weight loss or anorexia. Medical coders rely on R64 when documenting cases that involve symptoms like emaciation, metabolic wasting syndrome, or malignant cachexia, ensuring accurate coding for patients with systemic illness-related weight loss. When searching for the ICD-10 code for cachexia or related terms such as “abnormal weight loss associated with AIDS,” R64 is the specific code that facilitates consistent documentation and clinical communication.
Questions About This Page
How many billable codes are in the R64 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the R64 range classify?
The range classifies cachexia. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
