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L6684 — Upper extremity addition, test socket, shoulder disarticulation or interscapular thoracic

HCPCS Level II L-code · short descriptor: “Test socket shldr disart/tho”

Code system
HCPCS Level II
Family
L — Orthotics & prosthetics
Medicare coverage status
Carrier judgment — coverage decided by the DME MAC
DMEPOS payment category
Prosthetics & orthotics
Prior authorization
Not on Medicare required-PA list
Face-to-face & WOPD
Not on the required list
Status
Active (April 2026 HCPCS)

Prior authorization

Not on the Medicare required-PA list as of the January 13, 2026 update (74 items). Medicare Advantage and commercial plans set their own prior-authorization rules for this code — verify per plan before delivery.

Order readiness — what the written order must contain

Every Medicare DMEPOS claim needs a Standard Written Order with all six elements (42 CFR 410.38(d)):

  • Beneficiary name or Medicare Beneficiary Identifier (MBI) (42 CFR 410.38(d)(1)(i)(A))
  • General description of the item (42 CFR 410.38(d)(1)(i)(B))
  • Quantity to be dispensed, if applicable (42 CFR 410.38(d)(1)(i)(C))
  • Order date (42 CFR 410.38(d)(1)(i)(D))
  • Treating practitioner name or NPI (42 CFR 410.38(d)(1)(i)(E))
  • Treating practitioner signature (42 CFR 410.38(d)(1)(i)(F))

Not on the F2F/WOPD list (April 13, 2026 update — 83 items). The standard written order must reach the supplier before claim submission.

Blank requirements checklist only — MyMedi-AI never collects or stores completed orders.

L6684 Medicare fee schedule (April 2026)

Base (no modifier) Prosthetics & orthotics

Medicare allowable ranges from $426.74 to $767.22 depending on state and rural status.

Former-CBA payment limits: ceiling $568.98 · floor $426.74

StateNon-ruralRural
AK$717.50
AL$426.74
AR$426.74
AZ$568.98
CA$568.98
CO$466.16
CT$525.98
DC$426.74
DE$426.74
FL$426.74
GA$426.74
HI$767.22
IA$426.74
ID$567.74
IL$568.98
IN$568.98
KS$426.74
KY$426.74
LA$426.74
MA$525.98
MD$426.74
ME$525.98
MI$568.98
MN$568.98
MO$426.74
MS$426.74
MT$466.16
NC$426.74
ND$466.16
NE$426.74
NH$525.98
NJ$544.94
NM$426.74
NV$568.98
NY$544.94
OH$568.98
OK$426.74
OR$567.74
PA$426.74
PR$638.80
RI$525.98
SC$426.74
SD$466.16
TN$426.74
TX$426.74
UT$466.16
VA$426.74
VI$544.94
VT$525.98
WA$567.74
WI$568.98
WV$426.74
WY$466.16
Amounts are the Medicare DMEPOS fee-schedule allowables effective April 2026. Medicare typically pays 80% of the allowable after the Part B deductible; the patient owes 20%. A 2% sequestration reduction applies to the Medicare share. Former competitive-bidding-area adjustments and non-continental rates can differ — verify with your DME MAC.

Common denial codes to watch

Related L-codes

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