MyMedi-AI

L5631 — Addition to lower extremity, above knee or knee disarticulation, acrylic socket

HCPCS Level II L-code · short descriptor: “Ak/knee disartic acrylic soc”

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.

L5631 Medicare fee schedule (April 2026)

Base (no modifier) Prosthetics & orthotics

Medicare allowable ranges from $533.24 to $856.60 depending on state and rural status.

Former-CBA payment limits: ceiling $717.21 · floor $537.91

StateNon-ruralRural
AK$533.24
AL$537.91
AR$717.21
AZ$537.91
CA$537.91
CO$537.91
CT$717.21
DC$657.03
DE$657.03
FL$537.91
GA$537.91
HI$570.15
IA$537.91
ID$537.91
IL$537.91
IN$537.91
KS$537.91
KY$537.91
LA$717.21
MA$717.21
MD$657.03
ME$717.21
MI$537.91
MN$537.91
MO$537.91
MS$537.91
MT$537.91
NC$537.91
ND$537.91
NE$537.91
NH$717.21
NJ$717.21
NM$717.21
NV$537.91
NY$717.21
OH$537.91
OK$717.21
OR$537.91
PA$657.03
PR$856.60
RI$717.21
SC$537.91
SD$537.91
TN$537.91
TX$717.21
UT$537.91
VA$657.03
VI$717.21
VT$717.21
WA$537.91
WI$537.91
WV$657.03
WY$537.91
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

Bill L5631 with confidence

MyMedi-AI scrubs whole claims against NCCI pairs, MUE limits, modifier rules, and PA flags before you submit — built for DME teams, no PHI stored on our servers.

Start free trial   Run a CMS-0057-F readiness check

Prefer DIY compliance? Self-audit documentation kits for DME suppliers →

Building an AI agent? Try the agent API in the playground — free PA-required lookups, L5631 included, and starter credits via POST /bot-marketplace/register.