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ICD-10-CM 2027 diagnosis code

E63.0Essential fatty acid [EFA] deficiency

✓ Billable / specific

E63.0 is a valid, billable ICD-10-CM code for essential fatty acid [efa] deficiency. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About E63.0

E63.0 is the ICD-10-CM diagnosis code for essential fatty acid [EFA] deficiency. It belongs to category E63 (other nutritional deficiencies), block E50-E64 (other nutritional deficiencies) and chapter 4 (endocrine, nutritional and metabolic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within E63 (other nutritional deficiencies), E63.0 is specifically for essential fatty acid [EFA] deficiency. Related codes cover Imbalance of constituents of food intake (E63.1), other specified nutritional deficiencies (E63.8) and nutritional deficiency, unspecified (E63.9).

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.

Before ICD-10, this condition was coded in ICD-9-CM as 269.8 (other nutritional deficiency).

Notes that apply from higher levels

Instructions written at a parent level also apply to E63.0.

› From E63 Other nutritional deficiencies
Excludes2
  • 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.-)

Broader instructions also apply from E50-E64 Other nutritional deficiencies and Chapter 4: Endocrine, nutritional and metabolic diseases.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to E63.0.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 269.8Other nutritional deficiencyapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about E63.0

Is E63.0 billable?

Yes. E63.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can E63.0 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict E63.0 as a principal diagnosis.

Is E63.0 a CC or MCC?

No. E63.0 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does E63.0 group to?

E63.0 is used in the MS-DRG v44.0 logic for MS-DRG 640 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC) and MS-DRG 641 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for E63.0?

The CMS General Equivalence Mappings map E63.0 to ICD-9-CM 269.8.