L1 HCPCS Level II modifier: Provider attestation that the hospital laboratory test(s) is not packaged under the hospital opps
CMS terminated L1: its last date of service was Dec 31, 2016. It stays here for looking up older claims; newer services need a current code.
Official description
L1Provider attestation that the hospital laboratory test(s) is not packaged under the hospital opps
Short description: Separately payable lab test
HCPCS · United States
Medicare details
The indicators CMS publishes with L1 in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Carrier judgment
- Added
- Jul 1, 2014
- Terminated after
- Dec 31, 2016
Where L1 sits
- 1GroupHCPCS modifiers
- 2Terminated L1Provider attestation that the hospital laboratory test(s) is not packaged under the hospital opps
Source and release
- Data release
- HCPCS Level II · October 2026
- Effective date
- Oct 1, 2026
- Publisher
- CMS
This page is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes: Centers for Medicare & Medicaid Services’s October 2026 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
Is HCPCS code L1 still valid?
No. CMS terminated L1; its last date of service was Dec 31, 2016. It is listed for looking up services from before then. Use a current code for newer services.
Where is L1 in the HCPCS Level II list?
L1 is listed under Modifiers.
Does Medicare cover L1?
CMS lists L1’s Medicare coverage as “Carrier judgment”. Coverage and payment still depend on the patient, the setting, the documentation and the payer.
Which HCPCS Level II release does this page use?
It uses CMS’s October 2026 release, in effect from Oct 1, 2026 to Dec 31, 2026. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside L1
All modifiersKUDmepos item subject to dmepos competitive bidding program number 3KVDmepos item subject to dmepos competitive bidding program that is furnished as part of a professional serviceKWDmepos item subject to dmepos competitive bidding program number 4KXRequirements specified in the medical policy have been metKYDmepos item subject to dmepos competitive bidding program number 5KZNew coverage not implemented by managed careLCLeft circumflex coronary arteryLDLeft anterior descending coronary arteryLLLease/rental (use the 'll' modifier when dme equipment rental is to be applied against the purchase price)LMLeft main coronary arteryLRLaboratory round tripLSFda-monitored intraocular lens implant