2026 ICD-10-CM E10.33: Type 1 diabetes mellitus

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Code lookupE10.33

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

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

E10.33

Header CodeICD-10-CMOfficial ICD-10-CMCodebook guidance

Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

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

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

E10Type 1 diabetes mellitus E10.3Type 1 diabetes mellitus with ophthalmic complications E10.33Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy

Inclusion Terms

Official

No inclusion terms are included in this display for E10.33. Check the code and parent instructions in the Code Book.

Excludes 2

Official

No Excludes 2 notes are included in this display for E10.33. Check the code and parent instructions in the Code Book.

Related Codes

Official

E10.331Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema E10.339Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy without macular edema

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 E10.33. Check the code and parent instructions in the Code Book.

Use Additional

Official

No Use Additional Code instructions are included in this display for E10.33. Check the code and parent instructions in the Code Book.

Code Also

Official

No Code Also instructions are included in this display for E10.33. Check the code and parent instructions in the Code Book.

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 →

Code: E10.33
Description: Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy
HCC (V28): No CMS-HCC V28 mapping
RAF reference coefficient: —
Billable: No
Payment year: 2026

Coder workflow notes

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What This Code Means

E10.33 is the ICD-10-CM diagnosis code for type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy. E10.33 sits in the ICD-10-CM chapter for endocrine, nutritional and metabolic diseases (e00-e89), within the section covering diabetes mellitus (e08-e13).

Header codes like E10.33 cannot be reported on claims directly; they organize child codes that share clinical context. Coders should select the billable child code that matches the documented presentation and then verify its current source-backed HCC mapping. Do not infer a child code or risk adjustment value from the header alone.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for E10.33 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Child Codes

E10.331Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy with macular edema

E10.339Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy without macular edema

Code Hierarchy

└E10Type 1 diabetes mellitus └E10.3Type 1 diabetes mellitus with ophthalmic complications └E10.33Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy

└E10.33Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy

Also searched as

E10 33
E1033

More on E10.33

Code family

Every E10 code with its CMS-HCC V28 statusType 1 diabetes mellitus, 87 billable codes

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