What is ICD-10 code E83.118?

E83.118 is the ICD-10-CM diagnosis code for Other hemochromatosis. Iron overload in the body caused by factors other than hereditary hemochromatosis, such as repeated blood transfusions or liver disease. It belongs to the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89). E83.118 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. E83.118 is part of the FY2026 ICD-10-CM code set published by the CMS National Center for Health Statistics and used on Medicare, Medicaid, and commercial claims in the United States.

Yes. E83.118 is a billable ICD-10-CM code that can be reported on professional and institutional claims as a primary or secondary diagnosis when the provider documentation supports the specific condition described. Billable codes in ICD-10-CM are coded to the highest level of specificity available for the documented diagnosis. E83.118 is current for fiscal year 2026 and remains in the active CMS ICD-10-CM code set published by the National Center for Health Statistics.

What is the V28 vs V24 difference for E83.118?

E83.118 does not map to a payment HCC under either the CMS-HCC V28 risk adjustment model or the older V24 model. V28 reached 100% phase-in for payment year 2026, replacing V24 which was used during the PY2024–PY2025 transition. Because neither community model rewards E83.118 with a risk adjustment factor, it contributes zero to a Medicare Advantage beneficiary's V28/V24 community RAF score in either version. It does, however, map under the Part D RxHCC model (Other Significant Endocrine and Metabolic Disorders), which affects the ESRD and/or Part D (RxHCC) risk scores. Coders should check whether provider documentation supports a more specific child code that does map to a community payment HCC.

What should coders know when reporting E83.118?

Use this code when hemochromatosis is secondary to another condition or cause Document the underlying cause when possible to support medical necessity

E83.118: Other hemochromatosis — ICD-10

ICD-10-CM Code View

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Code lookupE83.118Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Metabolic disorders (E70-E88)

E83.118

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Other hemochromatosis

Iron overload in the body caused by factors other than hereditary hemochromatosis, such as repeated blood transfusions or liver disease.

Buddy Insight

Other hemochromatosis captures non-hereditary forms of iron overload, most commonly secondary (transfusional) hemochromatosis from repeated blood transfusions in conditions like thalassemia or myelodysplastic syndromes.

CMS-HCC V28

N/A

—

Not risk-adjusted for this model/period.

Not mapped

CMS-HCC V24

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ACA/HHS

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ESRD/PACE

N/A

—

Not risk-adjusted for this model/period.

Not mapped

RXHCC

Mapped

HCC 43

Other Significant Endocrine a...

RAF 0.063

Code Book Path

Official

E83.1Disorders of iron metabolism

E83.11Hemochromatosis

E83.118Other hemochromatosis

Inclusion Terms

Official

ICD-10-CM does not list inclusion terms for E83.118 in this effective period.

Excludes 2

Official

ICD-10-CM does not list Excludes 2 notes for E83.118 in this effective period.

Related Child Codes

Official

E83.110Hereditary hemochromatosis

E83.111Hemochromatosis due to repeated red blood cell transfusions

E83.119Hemochromatosis, unspecified

Includes

Official

ICD-10-CM does not list Includes notes for E83.118 in this effective period.

Excludes 1

Official

GALD (P78.84)
Gestational alloimmune liver disease (P78.84)
Neonatal hemochromatosis (P78.84)

Code First

Official

ICD-10-CM does not list Code First sequencing instructions for E83.118 in this effective period.

Use Additional

Official

ICD-10-CM does not list Use Additional Code instructions for E83.118 in this effective period.

Code Also

Official

ICD-10-CM does not list Code Also instructions for E83.118 in this effective period.

Buddy Documentation Tip

HCC Buddy guidance

Specific etiology of the hemochromatosis (e.g., transfusional, neonatal, African type)

Underlying condition causing secondary iron overload if applicable

Serum ferritin levels and trend over time

Current treatment (iron chelation therapy, phlebotomy, or monitoring)

MEAT Support

HCC Buddy guidance

Specific etiology of the hemochromatosis (e.g., transfusional, neonatal, African type)

Underlying condition causing secondary iron overload if applicable

Serum ferritin levels and trend over time

Current treatment (iron chelation therapy, phlebotomy, or monitoring)

Audit Caution

HCC Buddy guidance

Using this code for hereditary hemochromatosis — hereditary type has its own specific code E83.110 with HCC mapping

Failing to code the underlying cause of secondary iron overload separately (e.g., thalassemia, sickle cell disease)

Missing documentation of the specific type of hemochromatosis, leading to default to unspecified

Not querying the provider when 'iron overload' is documented without specifying hemochromatosis type

Common Mistakes

HCC Buddy guidance

E83.110 — Hereditary hemochromatosis: use when genetic/hereditary form is confirmed; carries HCC mapping unlike E83.118

E83.119 — Hemochromatosis, unspecified: use only when type is unknown; E83.118 is more specific

E83.19 — Other disorders of iron metabolism: broader category for iron metabolism disorders that are not hemochromatosis

D64.9 — Anemia, unspecified: sometimes confused when transfusion-dependent anemia leads to secondary iron overload

Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.

Is E83.118 an HCC code?

E83.118 is not in the CMS-HCC V28 or V24 community payment model, but it does map to Other Significant Endocrine and Metabolic Disorders under the Part D RxHCC model.

HCC Category Mapping

RxHCCHCC 43, Other Significant Endocrine and Metabolic Disorders

0.063

Each model's RAF is its CMS base weight for that model's standard population, so weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.

Work E83.118 in the Code Book — tabular path, V28 RAF, and MEAT checklist →

MEAT Criteria for E83.118

For E83.118to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.

MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
EEvaluate: test results, medication response, or physical findings reviewed by the provider
AAssess: explicit mention in the assessment or plan with acknowledgment of status
TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis

Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed E83.118 during that encounter, not just copy-forwarded from a problem list.

Coder workflow notes

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What This Code Means

E83.118 is the ICD-10-CM diagnosis code for other hemochromatosis. Iron overload in the body caused by factors other than hereditary hemochromatosis, such as repeated blood transfusions or liver disease. E83.118 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering metabolic disorders (e70-e88).

E83.118 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.

This code does not map to a CMS-HCC V28 payment category. Capture depends on documentation that supports the diagnosis; verify the HCC assignment against the current CMS mapping for the applicable payment year. Coders reviewing E83.118 should check whether additional documentation would support a more specific child code in the same hierarchy that does map to a payment HCC, capturing the correct specificity is the highest-impact RAF improvement available within accurate coding.

HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for E83.118 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Use this code when hemochromatosis is secondary to another condition or cause
•Document the underlying cause when possible to support medical necessity

Clinical Significance

Documentation Requirements

✓Specific etiology of the hemochromatosis (e.g., transfusional, neonatal, African type)
✓Underlying condition causing secondary iron overload if applicable
✓Serum ferritin levels and trend over time
✓Current treatment (iron chelation therapy, phlebotomy, or monitoring)
✓Assessment for end-organ damage (hepatic, cardiac, endocrine)

Commonly Confused Codes

•E83.110: Hereditary hemochromatosis: use when genetic/hereditary form is confirmed; carries HCC mapping unlike E83.118
•E83.119: Hemochromatosis, unspecified: use only when type is unknown; E83.118 is more specific
•E83.19: Other disorders of iron metabolism: broader category for iron metabolism disorders that are not hemochromatosis
•D64.9: Anemia, unspecified: sometimes confused when transfusion-dependent anemia leads to secondary iron overload