E61.2 ICD-10-CM Code: Magnesium deficiency
HCC Buddy Code Card
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FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Other nutritional deficiencies (E50-E64)
E61.2
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceMagnesium deficiency
A condition where the body lacks sufficient magnesium, an essential mineral needed for muscle and nerve function, energy production, and bone health.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for E61.2 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for E61.2 in this effective period.
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for E61.2 in this effective period.
Excludes 1
Official- disorders of mineral metabolism (E83.-)
- iodine deficiency related thyroid disorders (E00-E02)
- sequelae of malnutrition and other nutritional deficiencies (E64.-)
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for E61.2 in this effective period.
Use Additional
Official- code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Code Also
OfficialICD-10-CM does not list Code Also instructions for E61.2 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is E61.2 an HCC code?
No. E61.2 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
- Code
- E61.2
- Description
- Magnesium deficiency
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- Yes
- Payment year
- 2026
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
E61.2 is the ICD-10-CM diagnosis code for magnesium deficiency. A condition where the body lacks sufficient magnesium, an essential mineral needed for muscle and nerve function, energy production, and bone health. E61.2 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering other nutritional deficiencies (e50-e64).
E61.2 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 underlying cause if known (e.g., malabsorption, medication-induced, dietary insufficiency).
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for E61.2 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Document the underlying cause if known (e.g., malabsorption, medication-induced, dietary insufficiency)
- •Distinguish from other mineral deficiencies and specify if symptomatic (muscle weakness, cramps, cardiac arrhythmias)