E63.0 ICD-10-CM Code: Essential fatty acid [EFA] deficiency
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FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Other nutritional deficiencies (E50-E64)
E63.0
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceEssential fatty acid [EFA] deficiency
This condition occurs when the body lacks sufficient essential fatty acids, which are nutrients that cannot be made by the body and must come from food sources like fish, nuts, and seeds. Without adequate essential fatty acids, patients may experience skin problems, hair loss, and other health complications.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
00
RAF 0
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Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for E63.0 in this effective period.
Excludes 2
Official- dehydration (E86.0)
- failure to thrive, adult (R62.7)
- failure to thrive, child (R62.51)
- feeding problems in newborn (P92.-)
- sequelae of malnutrition and other nutritional deficiencies (E64.-)
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for E63.0 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for E63.0 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for E63.0 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for E63.0 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for E63.0 in this effective period.
Buddy Documentation Tip
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is E63.0 an HCC code?
No. E63.0 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
Coder workflow notes
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This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
E63.0 is the ICD-10-CM diagnosis code for essential fatty acid [efa] deficiency. This condition occurs when the body lacks sufficient essential fatty acids, which are nutrients that cannot be made by the body and must come from food sources like fish, nuts, and seeds. Without adequate essential fatty acids, patients may experience skin problems, hair loss, and other health complications. E63.0 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering other nutritional deficiencies (e50-e64).
E63.0 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
Document the specific manifestations of EFA deficiency (such as dermatitis or alopecia) as secondary diagnoses to provide complete clinical picture.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for E63.0 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the specific manifestations of EFA deficiency (such as dermatitis or alopecia) as secondary diagnoses to provide complete clinical picture
- •Verify that malnutrition or nutritional deficiency is the primary reason for encounter before coding E63.0, as this code is typically used when EFA deficiency is a documented nutritional problem rather than an incidental finding