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ICD-10-CM 2027 diagnosis code

E74.810Glucose transporter protein type 1 deficiency

✓ Billable / specificCC — complication/comorbidity

E74.810 is a valid, billable ICD-10-CM code for glucose transporter protein type 1 deficiency. 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 GLUT1 deficiency syndrome 1, ICD-10 code for GLUT1 deficiency syndrome 2.

Code last changed in FY2021 (effective October 1, 2020). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About E74.810

E74.810 is the ICD-10-CM diagnosis code for glucose transporter protein type 1 deficiency. It belongs to category E74 (other disorders of carbohydrate metabolism), 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 E74.81 (disorders of glucose transport, not elsewhere classified), E74.810 is specifically for glucose transporter protein type 1 deficiency. Related codes cover other disorders of glucose transport (E74.818) and disorders of glucose transport, unspecified (E74.819).

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 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 FY2021, effective October 1, 2020.

Coding notes

Applicable toConditions and synonyms classified to this code
  • De Vivo syndrome
  • Glucose transport defect, blood-brain barrier
  • Glut1 deficiency
  • GLUT1 deficiency syndrome 1, infantile onset
  • GLUT1 deficiency syndrome 2, childhood onset

Notes that apply from higher levels

Instructions written at a parent level also apply to E74.810.

› From E74 Other disorders of carbohydrate metabolism
Excludes1

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

Alphabetic index entries

6 entries

Terms in the official ICD-10-CM index that lead to E74.810.

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
  • FY2021 (effective 10/1/2020): Added
  • No changes since FY2021.

Common questions about E74.810

Is E74.810 billable?

Yes. E74.810 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can E74.810 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict E74.810 as a principal diagnosis.

Is E74.810 a CC or MCC?

E74.810 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does E74.810 group to?

E74.810 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.