AHA Coding Clinic® for ICD-9 - 2004 Quarter 2; Clarifications
Insulin Dependent Diabetes Mellitus (IDDM)
We need clarification regarding the appropriate way to code a diagnosis stated only as "insulin dependent diabetes mellitus." The physician does not state whether the patient is a Type I or Type II diabetic. Some of our coders feel that the fifth digit of "1," Diabetes mellitus, type I [insulin dependent type][IDDM][juvenile type], not stated as uncontrolled , should be assigned because IDDM is a nonessential modifier for this fifth digit in the Tabular List of Diseases. How should a diagnosis of IDDM be coded when the specific type is not documented? ...
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Article Overview
This coding clarification article explains how to approach diabetes documentation that mentions insulin dependence but does not identify the underlying diabetes type. It is aimed at coding professionals who need guidance on documentation-based diagnosis assignment and on distinguishing between broad diabetes terminology and the type designations used in the classification system.
Why This Topic Matters
Accurate diabetes coding depends on the provider’s documented type, and ambiguous terminology can lead to inconsistent code selection. This article helps coders understand the documentation issue and the general principle that coding must follow the physician’s stated diabetes type rather than treatment alone.
What You Will Learn
- How to interpret ambiguous diabetes documentation in coding practice.
- Why the provider’s stated diabetes type matters for diagnosis classification.
- The general relationship between insulin use and diabetes type documentation.
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Who Should Read This
- Medical coders
- Coding auditors
- Clinical documentation specialists
- Revenue cycle staff
Codes Discussed
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