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ICD-10 Guide
ICD-10 CodesE10.65

E10.65

Billable

Type 1 diabetes mellitus with hyperglycemia

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

Code Description

ICD-10 E10.65 is a billable code used to indicate a diagnosis of type 1 diabetes mellitus with hyperglycemia.

Key Diagnostic Point:

Type 1 diabetes mellitus (T1DM) is an autoimmune condition characterized by the destruction of insulin-producing beta cells in the pancreas, leading to absolute insulin deficiency. Patients with T1DM often present with symptoms such as polyuria, polydipsia, and unexplained weight loss. Hyperglycemia, defined as elevated blood glucose levels, is a common complication of diabetes and can occur due to inadequate insulin management, dietary indiscretion, or illness. Chronic hyperglycemia can lead to serious complications, including diabetic ketoacidosis (DKA), cardiovascular disease, neuropathy, nephropathy, and retinopathy. Management of T1DM typically involves a combination of insulin therapy, dietary modifications, and regular monitoring of blood glucose levels. The HbA1c test is a critical tool for assessing long-term glycemic control, with target levels generally set below 7% for most adults. However, individual goals may vary based on patient-specific factors. Effective management of T1DM and associated hyperglycemia requires a multidisciplinary approach, including education on insulin administration, carbohydrate counting, and recognition of hypoglycemia and hyperglycemia symptoms.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiation between Type 1 and Type 2 diabetes
  • Management of insulin therapy and dosage adjustments
  • Monitoring and interpretation of HbA1c levels
  • Documentation of hyperglycemia causes and management strategies

Audit Risk Factors

  • Inadequate documentation of hyperglycemia causes
  • Failure to document insulin regimen adjustments
  • Lack of HbA1c level documentation
  • Misclassification of diabetes type

Specialty Focus

Medical Specialties

Endocrinology

Documentation Requirements

Detailed records of insulin therapy, HbA1c levels, and patient education on diabetes management.

Common Clinical Scenarios

Patients presenting with uncontrolled blood glucose levels, frequent DKA episodes, or complications such as neuropathy.

Billing Considerations

Endocrinologists must document the rationale for insulin adjustments and any changes in treatment plans.

Primary Care

Documentation Requirements

Comprehensive patient history, including lifestyle factors, medication adherence, and regular monitoring of blood glucose levels.

Common Clinical Scenarios

Routine follow-ups for diabetes management, addressing acute hyperglycemia, and coordinating care with specialists.

Billing Considerations

Primary care providers should ensure continuity of care and document referrals to specialists when necessary.

Coding Guidelines

Inclusion Criteria

Use E10.65 When
  • According to ICD
  • 10 coding guidelines, E10
  • 65 should be used when a patient with Type 1 diabetes experiences hyperglycemia
  • Coders must ensure that the documentation supports the diagnosis and that any associated complications are also coded appropriately

Exclusion Criteria

Do NOT use E10.65 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used for routine follow-up visits for diabetes management.

Documentation Requirements

Documentation must include patient history, examination findings, and management plan.

Specialty Considerations

Endocrinologists may require more detailed documentation of treatment adjustments.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of diabetes types and complications, improving the accuracy of diabetes management documentation and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of diabetes types and complications, improving the accuracy of diabetes management documentation and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

Resources

Clinical References

  • •
    American Diabetes Association

Coding & Billing References

  • •
    American Diabetes Association

Frequently Asked Questions

What is the difference between E10.65 and E10.9?

E10.65 is used when a patient with Type 1 diabetes has hyperglycemia, while E10.9 is used for Type 1 diabetes without complications. Accurate coding depends on the presence of hyperglycemia and its management.