ICD-10-CM 2027
ICD-10 code for localized pad fat
From the official ICD-10-CM alphabetic index entry “Fat › localized (pad)”. Page updated September 29, 2026.
About coding localized pad fat
The ICD-10-CM code for localized pad fat is E65 (Localized adiposity). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on E65.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 640 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC, relative weight 1.3395) and DRG 641 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC, relative weight 0.7865), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific localized pad fat codes (official index)
Common questions about localized pad fat ICD-10 codes
What is the ICD-10 code for localized pad fat?
- E65 — Localized adiposity. More specific codes apply when the documentation supports them: M79.4, M79.4.
What is the ICD-10 code for knee localized pad fat?
- M79.4 — Hypertrophy of (infrapatellar) fat pad.
What is the ICD-10 code for retropatellar localized pad fat?
- M79.4 — Hypertrophy of (infrapatellar) fat pad.
Is E65 billable?
- Yes. E65 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E65 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E65 as a principal diagnosis.
Is E65 a CC or MCC?
- No. E65 is neither a CC nor an MCC under MS-DRG v44.0.