HCPCS Code L3999: Upper Limb Orthosis, Not Otherwise Specified

Struggling with L3999? Learn when to use this NOC code, the documentation to include, modifiers to add, and how DME MACs review unspecified L-codes.

Use Code

Frequently asked questions

Use L3999 only when no existing HCPCS describes the device accurately. If a defined code covers the design, region, and fabrication method, use that code because it is more precise and typically reimburses without manual pricing.

Many payers require prior authorization for a NOC code. Check your plan’s policy and the DME MAC website for instructions. Submitting a thorough narrative and invoice with the request will speed review.

Humeral fracture braces often fall within the L3980–L3995 range, depending on design. Select the code whose description best matches the brace configuration and fabrication. If no description fits, L3999 may be appropriate with a clear narrative.