I12.0

Clinical notes

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

• •If the associated manifestation or related condition noted above is also documented, an additional code should be reported alongside this one.
• •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

ICD-9-CM equivalent

Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.

• 40301Approximate match
• 40311Approximate match
• 40391Approximate match

Associated MS-DRGs

I12.0 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.

Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.

• DRG 643Endocrine Disorders with MCC
• DRG 644Endocrine Disorders with CC
• DRG 645Endocrine Disorders without CC/MCC
• DRG 682Renal Failure with MCC
• DRG 683Renal Failure with CC
• DRG 684Renal Failure without CC/MCC