What is ICD-10 code E10.59?

E10.59 is the ICD-10-CM diagnosis code for Type 1 diabetes mellitus with other circulatory complications. Type 1 diabetes with other blood circulation problems not specifically classified, such as blood clots or other vascular complications. It belongs to the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89). E10.59 is a billable code, meaning it can be reported on a claim as a primary or secondary diagnosis when supported by documentation. E10.59 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. E10.59 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. E10.59 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.

Which HCC does E10.59 map to under V28?

E10.59 maps to CMS-HCC V28 HCC 37 (Diabetes with Chronic Complications). The category numbers, labels, and conditions come from the CMS-HCC V28 model file for payment year 2026.

2026 ICD-10-CM E10.59: Type 1 diabetes mellitus

E10.59 maps to CMS-HCC V28 37. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · HCC coding software

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Code lookupE10.59

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Endocrine, nutritional and metabolic diseases (E00-E89) / Diabetes mellitus (E08-E13)

E10.59

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

Type 1 diabetes mellitus with other circulatory complications

Type 1 diabetes with other blood circulation problems not specifically classified, such as blood clots or other vascular complications.

Buddy Insight

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

Mapped

HCC 37

Diabetes with Chronic Complic...

Code-level coefficient reference

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

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 30

Diabetes with Complications

Code-level coefficient reference

Code Book Path

Official

E10Type 1 diabetes mellitus E10.5Type 1 diabetes mellitus with circulatory complications E10.59Type 1 diabetes mellitus with other circulatory complications

Inclusion Terms

Official

No inclusion terms are included in this display for E10.59. Check the code and parent instructions in the Code Book.

Excludes 2

Official

No Excludes 2 notes are included in this display for E10.59. Check the code and parent instructions in the Code Book.

Related Codes

Official

E10.51Type 1 diabetes mellitus with diabetic peripheral angiopathy without gangrene E10.52Type 1 diabetes mellitus with diabetic peripheral angiopathy with gangrene

Includes

Official

brittle diabetes (mellitus)Inherited from E10
diabetes (mellitus) due to autoimmune processInherited from E10
diabetes (mellitus) due to immune mediated pancreatic islet beta-cell destructionInherited from E10
idiopathic diabetes (mellitus)Inherited from E10
juvenile onset diabetes (mellitus)Inherited from E10
ketosis-prone diabetes (mellitus)Inherited from E10

Excludes 1

Official

transitory endocrine and metabolic disorders specific to newborn (P70-P74)Inherited from E00-E89, E10
diabetes mellitus due to underlying condition (E08.-)Inherited from E00-E89, E10
drug or chemical induced diabetes mellitus (E09.-)Inherited from E00-E89, E10
gestational diabetes (O24.4-)Inherited from E00-E89, E10
hyperglycemia NOS (R73.9)Inherited from E00-E89, E10
neonatal diabetes mellitus (P70.2)Inherited from E00-E89, E10
postpancreatectomy diabetes mellitus (E13.-)Inherited from E00-E89, E10
postprocedural diabetes mellitus (E13.-)Inherited from E00-E89, E10
secondary diabetes mellitus NEC (E13.-)Inherited from E00-E89, E10
type 2 diabetes mellitus (E11.-)Inherited from E00-E89, E10

Code First

Official

No Code First sequencing instructions are included in this display for E10.59. Check the code and parent instructions in the Code Book.

Use Additional

Official

No Use Additional Code instructions are included in this display for E10.59. Check the code and parent instructions in the Code Book.

Code Also

Official

No Code Also instructions are included in this display for E10.59. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance

The provider must document the specific circulatory complication and establish its causal relationship to Type 1 diabetes.

Documentation should include relevant vascular studies, laboratory findings, and clinical examination results.

The record should confirm the complication does not fit the peripheral angiopathy codes (E10.51/E10.52) to justify use of this residual category.

MEAT Support

HCC Buddy guidance

The provider must document the specific circulatory complication and establish its causal relationship to Type 1 diabetes.

Documentation should include relevant vascular studies, laboratory findings, and clinical examination results.

The record should confirm the complication does not fit the peripheral angiopathy codes (E10.51/E10.52) to justify use of this residual category.

Audit Caution

HCC Buddy guidance

Do not use this code as a substitute for poorly documented circulatory problems

always query the provider for specificity when possible. Ensure the circulatory complication is attributable to diabetes rather than an independent cardiovascular condition. When multiple circulatory complications exist, capture each with appropriate codes.

Common Mistakes

HCC Buddy guidance

E10.51 and E10.52 are specific to peripheral angiopathy with or without gangrene and should be used when those conditions are documented.

I25.10 (atherosclerotic heart disease) is coded separately from diabetic circulatory complications.

E10.69 (other specified complication) covers non-circulatory complications and should not be confused with this vascular-specific code.

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 E10.59 an HCC code?

Yes. E10.59 (Type 1 diabetes mellitus with other circulatory complications) maps to HCC 37, Diabetes with Chronic Complications under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 0.166. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.

Coder answer: E10.59 is billable and maps to V28 HCC 37, Diabetes with Chronic Complications. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.

Code: E10.59
Description: Type 1 diabetes mellitus with other circulatory complications
HCC (V28): HCC 37 — Diabetes with Chronic Complications
RAF reference coefficient: 0.166
Billable: Yes
Payment year: 2026

HCC Category Mapping

V28HCC 37, Diabetes with Chronic Complications

0.166

RxHCCHCC 30, Diabetes with Complications

Not separately weighted

These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. 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 context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.

Work E10.59 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →

MEAT review for E10.59

For E10.59, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.

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

Coder workflow notes

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What This Code Means

E10.59 is the ICD-10-CM diagnosis code for type 1 diabetes mellitus with other circulatory complications. Type 1 diabetes with other blood circulation problems not specifically classified, such as blood clots or other vascular complications. E10.59 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering diabetes mellitus (e08-e13).

Under the CMS-HCC V28 risk adjustment model, E10.59 maps to Diabetes with Chronic Complications (HCC 37) with a source-labeled community, non-dual, aged reference coefficient of 0.166. No V24 mapping is shown for E10.59; use the applicable model and payment year when reviewing the V28 mapping. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.

Use this code for circulatory complications that don't fit into the peripheral angiopathy categories. For E10.59, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for E10.59 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Use this code for circulatory complications that don't fit into the peripheral angiopathy categories
•Ensure documentation specifies the type of circulatory complication to justify use of this code

Clinical Significance

This code captures Type 1 diabetes mellitus with circulatory complications beyond peripheral angiopathy, such as diabetic microangiopathy affecting various organ systems, thrombotic events, or other vascular manifestations of uncontrolled diabetes. These complications indicate systemic vascular damage from chronic hyperglycemia and carry significant risk for cardiovascular events and organ dysfunction.

Documentation Requirements

✓The provider must document the specific circulatory complication and establish its causal relationship to Type 1 diabetes.
✓Documentation should include relevant vascular studies, laboratory findings, and clinical examination results.
✓The record should confirm the complication does not fit the peripheral angiopathy codes (E10.51/E10.52) to justify use of this residual category.

Commonly Confused Codes

•E10.51 and E10.52 are specific to peripheral angiopathy with or without gangrene and should be used when those conditions are documented.
•I25.10 (atherosclerotic heart disease) is coded separately from diabetic circulatory complications.
•E10.69 (other specified complication) covers non-circulatory complications and should not be confused with this vascular-specific code.