ICD-10-CM 2027
ICD-10 code for Inanition
From the official ICD-10-CM alphabetic index entry “Inanition”. Page updated September 29, 2026.
About coding Inanition
The ICD-10-CM code for Inanition is R64 (Cachexia). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R64.
Don't report R64 together with the conditions in its Excludes1 note: abnormal weight loss (R63.4), cachexia due to underlying condition (E88.A) and nutritional marasmus (E41).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 947 (Signs and Symptoms with MCC, relative weight 1.261) and DRG 948 (Signs and Symptoms without MCC, relative weight 0.7835), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Inanition codes (official index)
Don't confuse with (Excludes1 for R64)
Common questions about Inanition ICD-10 codes
What is the ICD-10 code for Inanition?
- R64 — Cachexia. More specific codes apply when the documentation supports them: T73.0, R50.9.
What is the ICD-10 code for fever inanition?
- R50.9 — Fever, unspecified.
Is R64 billable?
- Yes. R64 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R64 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R64 as a principal diagnosis.
Is R64 a CC or MCC?
- R64 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.