E1HCPCS Level II
Upper left, eyelid
- Usage notes
- Append to eye/eyelid procedure codes to identify the upper left eyelid when a procedure is performed on a single eyelid.
- Common mistakes
- Billing without any eyelid modifier when a payer requires laterality/site detail for eyelid procedures, causing the line to deny for missing information.
Related modifiers
E2Lower left, eyelidE3Upper right, eyelidE4Lower right, eyelidEAErythropoietic stimulating agent (esa) administered to treat anemia due toEBErythropoietic stimulating agent (esa) administered to treat anemia due toECErythropoietic stimulating agent (esa) administered to treat anemia not due toEDHematocrit level has exceeded 39% (or hemoglobin level has exceeded 13.0 g/dl)EEHematocrit level has not exceeded 39% (or hemoglobin level has not exceeded
Frequently asked questions
What does modifier E1 mean?
Upper left, eyelid
When do I use modifier E1?
Append to eye/eyelid procedure codes to identify the upper left eyelid when a procedure is performed on a single eyelid.
What's a common mistake with modifier E1?
Billing without any eyelid modifier when a payer requires laterality/site detail for eyelid procedures, causing the line to deny for missing information.
HCPCS modifier data from CMS. CPT® is a registered trademark of the American Medical Association — CPT modifier descriptions are not included on this site. Always verify codes with authoritative sources before making billing decisions.