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ICD-10-CM 2027 diagnosis code

E78.010Homozygous familial hypercholesterolemia [HoFH]

✓ Billable / specific

E78.010 is a valid, billable ICD-10-CM code for homozygous familial hypercholesterolemia [hofh]. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Looking up by condition? See ICD-10 code for HoFH.

Code last changed in FY2026 (effective October 1, 2025). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About E78.010

E78.010 is the ICD-10-CM diagnosis code for Homozygous familial hypercholesterolemia [HoFH]. It belongs to category E78 (disorders of lipoprotein metabolism and other lipidemias), block E70-E88 (metabolic disorders) 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 E78.01 (familial hypercholesterolemia), E78.010 is specifically for Homozygous familial hypercholesterolemia [HoFH]. Related codes cover Heterozygous familial hypercholesterolemia [HeFH] (E78.011) and unspecified (E78.019).

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 642 (Inborn and Other Disorders of Metabolism, relative weight 1.3219), 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 was added in FY2026, effective October 1, 2025.

Notes that apply from higher levels

Instructions written at a parent level also apply to E78.010.

› From E78 Disorders of lipoprotein metabolism and other lipidemias
Excludes1

Broader instructions also apply from E70-E88 Metabolic disorders and Chapter 4: Endocrine, nutritional and metabolic diseases.

Alphabetic index entries

3 entries

Terms in the official ICD-10-CM index that lead to E78.010.

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.

MDC 10 · Endocrine, Nutritional and Metabolic Diseases and Disorders

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
  • FY2026 (effective 10/1/2025): Added
  • No changes since FY2026.

Common questions about E78.010

Is E78.010 billable?

Yes. E78.010 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can E78.010 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict E78.010 as a principal diagnosis.

Is E78.010 a CC or MCC?

No. E78.010 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does E78.010 group to?

E78.010 is used in the MS-DRG v44.0 logic for MS-DRG 642 (Inborn and Other Disorders of Metabolism). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.