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ICD-10 Guide
ICD-10 CodesE11.01

E11.01

Billable

Type 2 diabetes mellitus with hyperosmolarity with coma

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 E11.01 is a billable code used to indicate a diagnosis of type 2 diabetes mellitus with hyperosmolarity with coma.

Key Diagnostic Point:

E11.01 refers to Type 2 diabetes mellitus characterized by hyperosmolar hyperglycemic state (HHS) leading to coma. This condition typically arises in patients with poorly controlled diabetes, where extremely high blood glucose levels result in severe dehydration and electrolyte imbalances. The hyperosmolar state is marked by an elevated serum osmolality, often exceeding 320 mOsm/kg, and can lead to neurological impairment, including coma. Patients may present with symptoms such as extreme thirst, frequent urination, dry skin, and altered mental status. Management involves aggressive rehydration, insulin therapy to lower blood glucose levels, and careful monitoring of electrolytes. The condition is more common in older adults and those with comorbidities, emphasizing the need for comprehensive diabetes management to prevent such acute complications.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Requires understanding of diabetes pathophysiology and complications.
  • Involves distinguishing between hyperosmolarity and other diabetic emergencies.
  • Documentation must clearly indicate the presence of coma.
  • Requires knowledge of associated laboratory values (e.g., serum osmolality).

Audit Risk Factors

  • Inadequate documentation of coma or hyperosmolarity.
  • Failure to document the patient's history of diabetes management.
  • Lack of clear lab results supporting the diagnosis.
  • Misclassification of the type of diabetes.

Specialty Focus

Medical Specialties

Endocrinology

Documentation Requirements

Detailed patient history, including diabetes management and lab results.

Common Clinical Scenarios

Patients presenting with severe hyperglycemia and altered mental status.

Billing Considerations

Ensure clear documentation of the acute nature of the condition and any prior diabetes management.

Emergency Medicine

Documentation Requirements

Immediate assessment findings, lab results, and treatment provided.

Common Clinical Scenarios

Patients arriving in a coma or altered mental status due to hyperglycemia.

Billing Considerations

Document the timeline of events and interventions performed.

Coding Guidelines

Inclusion Criteria

Use E11.01 When
  • According to ICD
  • 10 guidelines, E11
  • 01 should be used when the patient has Type 2 diabetes with hyperosmolarity leading to coma
  • Documentation must support the diagnosis with clinical findings and lab results indicating hyperosmolarity and altered mental status

Exclusion Criteria

Do NOT use E11.01 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99285CPT Code

Emergency department visit, high severity

Clinical Scenario

Used when a patient with E11.01 presents to the emergency department in a coma.

Documentation Requirements

Document the patient's condition, vital signs, and treatment provided.

Specialty Considerations

Emergency physicians should ensure comprehensive documentation of the acute presentation.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of diabetes complications, improving the accuracy of patient records and reimbursement processes. E11.01 provides a clear distinction for severe cases requiring intensive management.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of diabetes complications, improving the accuracy of patient records and reimbursement processes. E11.01 provides a clear distinction for severe cases requiring intensive management.

Reimbursement & Billing Impact

reimbursement processes. E11.01 provides a clear distinction for severe cases requiring intensive management.

Resources

Clinical References

  • •
    American Diabetes Association

Coding & Billing References

  • •
    American Diabetes Association

Frequently Asked Questions

What are the key symptoms of hyperosmolarity in diabetes?

Key symptoms include extreme thirst, frequent urination, dry skin, confusion, and altered mental status, which can progress to coma if untreated.