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ICD-10-CM 2027 diagnosis code

E83.49Other disorders of magnesium metabolism

✓ Billable / specific

E83.49 is a valid, billable ICD-10-CM code for other disorders of magnesium metabolism. 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 E83.49

E83.49 is the ICD-10-CM diagnosis code for other disorders of magnesium metabolism. It belongs to category E83 (disorders of mineral 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 E83.4, choose E83.49 (Other disorders of magnesium metabolism) only when documentation doesn't support a more specific option: unspecified (E83.40), Hypermagnesemia (E83.41) and hypomagnesemia (E83.42).

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 275.2 (disorders of magnesium metabolism).

Notes that apply from higher levels

Instructions written at a parent level also apply to E83.49.

› From E83 Disorders of mineral metabolism
Excludes1
  • dietary mineral deficiency (E58-E61)
  • parathyroid disorders (E20-E21)
  • vitamin D deficiency (E55.-)

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

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to E83.49.

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 →
  • 275.2Disorders of magnesium metabolismapproximate

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 E83.49

Is E83.49 billable?

Yes. E83.49 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can E83.49 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict E83.49 as a principal diagnosis.

Is E83.49 a CC or MCC?

No. E83.49 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does E83.49 group to?

E83.49 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 E83.49?

The CMS General Equivalence Mappings map E83.49 to ICD-9-CM 275.2.