2026 ICD-10-CM Diagnosis Code E10.9Type 1 diabetes mellitus without complications

ICD-10-CM Codes›E00–E89›E08-E13›E10

ICD-10-CM E10.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E10.9 is a billable ICD-10-CM diagnosis code for type 1 diabetes mellitus without complications. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 637 through 639. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Diabetes mellitus without complication; and Diabetes mellitus, Type 1.

This medical diagnosis code is frequently used in Pediatrics medical specialties to designate conditions such diabetes mellitus.

Code Identity

ICD-10-CM Code
E10.9
Billable Status
Yes — Valid for Submission
Code Describes
Type 1 diabetes mellitus without complications
Short Description
Type 1 diabetes mellitus without complications
Same as the full description in the CMS dataset.
Parent Code
E10
Type 1 diabetes mellitus

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE08-E13Diabetes mellitus
CategoryE10Type 1 diabetes mellitus
This CodeE10.9Type 1 diabetes mellitus without complications

Quality Payment Program MeasuresBilling

Medicare quality measures that can apply when E10.9 is part of the patient record.

Diabetes: Hemoglobin A1c (HbA1c) Poor Control (>9%)

High Priority: YES

Measure Type: Intermediateoutcome

Submission Methods: Claims, Electronic Health Record, Cms Web Interface, Registry

Description: Percentage of patients 18-75 years of age with diabetes who had hemoglobin A1c > 9.0% during the measurement period.

View Measure

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Atherosclerosis, deafness, diabetes, epilepsy, nephropathy syndrome
  • Bilateral optic atrophy of eyes
  • Blood sugar charts
  • Brittle diabetes mellitus
  • Brittle type 1 diabetes mellitus
  • Diabetes mellitus
  • Diabetes mellitus in remission
  • Diabetes mellitus type 1 stage 1
  • Diabetes mellitus type 1 stage 2
  • Diabetes mellitus type 1 stage 3
  • Diabetes mellitus type 1 without retinopathy
  • Diabetes monitoring check done
  • Diabetes monitoring default
  • Diabetes monitoring deleted
  • Diabetes: practice program
  • Diabetes: shared care program
  • Diabetic - follow-up default
  • Diabetic - good control
  • Diabetic drug side effects
  • Diabetic monitoring - injection sites
  • Diabetic on insulin
  • Diabetic treatment changed
  • Does rotate site of insulin injection
  • Dysglycemia
  • Fulminant type 1 diabetes mellitus
  • Hemoglobin A1C - diabetic control finding
  • Hemoglobin A1c between 7 percent to 10 percent indicating borderline diabetic control
  • Hemoglobin A1c between 7%-9% indicating borderline diabetic control
  • Hemoglobin A1c greater than 10 percent indicating poor diabetic control
  • Hemoglobin A1c less than 7 percent indicating good diabetic control
  • Hemoglobin A1c within reference range
  • High hemoglobin A1c level
  • Insulin autoimmune syndrome
  • Insulin dependent diabetes mellitus type 1A
  • Insulin dependent diabetes mellitus type 1B
  • Latent autoimmune diabetes mellitus in adult
  • Newly diagnosed diabetes
  • Newly diagnosed type 1 diabetes mellitus
  • Pre-existing type 1 diabetes mellitus
  • Presymptomatic type 1 diabetes mellitus
  • Type 1 diabetes mellitus
  • Type 1 diabetes mellitus maturity onset
  • Type 1 diabetes mellitus, central and peripheral neurodegeneration syndrome
  • Type I diabetes mellitus in remission
  • Urine sugar charts
  • Well controlled type 1 diabetes mellitus
  • Wolfram syndrome
  • Wolfram syndrome type 1
  • Wolfram syndrome type 2

Coding GuidelinesGuidance

The diabetes mellitus codes are combination codes that include the type of diabetes mellitus, the body system affected, and the complications affecting that body system. As many codes within a particular category as are necessary to describe all of the complications of the disease may be used. They should be sequenced based on the reason for a particular encounter. Assign as many codes from categories E08 - E13 as needed to identify all of the associated conditions that the patient has.

The age of a patient is not the sole determining factor, though most type 1 diabetics develop the condition before reaching puberty. For this reason type 1 diabetes mellitus is also referred to as juvenile diabetes.

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Diabetes, diabetic(mellitus) (sugar)
      • type 1

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR END002
Diabetes mellitus without complication
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR END004
Diabetes mellitus, Type 1
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Wolfram Syndrome

    a hereditary condition characterized by multiple symptoms including those of diabetes insipidus; diabetes mellitus; optic atrophy; and deafness. this syndrome is also known as didmoad (first letter of each word) and is usually associated with vasopressin deficiency. it is caused by mutations in gene wfs1 encoding wolframin, a 100-kda transmembrane protein.

  • Diabetes Complications

    conditions or pathological processes associated with the disease of diabetes mellitus. due to the impaired control of blood glucose level in diabetic patients, pathological processes develop in numerous tissues and organs including the eye, the kidney, the blood vessels, and the nerve tissue.

  • Diabetes Mellitus

    a heterogeneous group of disorders characterized by hyperglycemia and glucose intolerance.

  • Diabetes Mellitus, Experimental

    diabetes mellitus induced experimentally by administration of various diabetogenic agents or by pancreatectomy.

  • Diabetes Mellitus, Lipoatrophic

    a type of diabetes mellitus that is characterized by severe insulin resistance and lipodystrophy. the latter may be generalized, partial, acquired, or congenital (lipodystrophy, congenital generalized).

  • Diabetes Mellitus, Type 1

    a subtype of diabetes mellitus that is characterized by insulin deficiency. it is manifested by the sudden onset of severe hyperglycemia, rapid progression to diabetic ketoacidosis, and death unless treated with insulin. the disease may occur at any age, but is most common in childhood or adolescence.

  • Diabetes Mellitus, Type 2

    a subclass of diabetes mellitus that is not insulin-responsive or dependent (niddm). it is characterized initially by insulin resistance and hyperinsulinemia; and eventually by glucose intolerance; hyperglycemia; and overt diabetes. type ii diabetes mellitus is no longer considered a disease exclusively found in adults. patients seldom develop ketosis but often exhibit obesity.

  • Diabetes, Gestational

    diabetes mellitus induced by pregnancy but resolved at the end of pregnancy. it does not include previously diagnosed diabetics who become pregnant (pregnancy in diabetics). gestational diabetes usually develops in late pregnancy when insulin antagonistic hormones peaks leading to insulin resistance; glucose intolerance; and hyperglycemia.

  • Latent Autoimmune Diabetes in Adults

    autoimmune diabetes in adults with slowly progressive pancreatic beta cell failure and the presence of circulating autoantibodies to pancreatic islets cell antigens.

  • Polyendocrinopathies, Autoimmune

    autoimmune diseases affecting multiple endocrine organs. type i is characterized by childhood onset and chronic mucocutaneous candidiasis (candidiasis, chronic mucocutaneous), while type ii exhibits any combination of adrenal insufficiency (addison's disease), lymphocytic thyroiditis (thyroiditis, autoimmune;), hypoparathyroidism; and gonadal failure. in both types organ-specific antibodies against a variety of endocrine glands have been detected. the type ii syndrome differs from type i in that it is associated with hla-a1 and b8 haplotypes, onset is usually in adulthood, and candidiasis is not present.

  • Pancreatectomy

    surgical removal of the pancreas. (dorland, 28th ed)

Patient EducationClinical

Diabetes Type 1

Diabetes means your blood glucose, or blood sugar, levels are too high. With type 1 diabetes, your pancreas does not make insulin. Insulin is a hormone that helps glucose get into your cells to give them energy. Without insulin, too much glucose stays in your blood.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert E10.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
250.01 DMI wo cmp nt st uncntrl
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About E10.9Overview

Is E10.9 (Type 1 diabetes mellitus) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report type 1 diabetes mellitus without complications on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does E10.9 group to?

When type 1 diabetes mellitus without complications is the principal diagnosis on an inpatient stay, it groups to MS-DRG 637, 638, 639, with relative weights from 0.6212 to 1.4367 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of E10.9?

Under the General Equivalence Mappings, type 1 diabetes mellitus without complications converts to ICD-9-CM 250.01 (DMI wo cmp nt st uncntrl). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.