E66.1

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.

• 27800Approximate match

Associated MS-DRGs

E66.1 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 606Minor Skin Disorders with MCC
• DRG 607Minor Skin Disorders without MCC
• DRG 640Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC
• DRG 641Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC