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A6558 — Gradient compression stocking, thigh length, 40 mmhg or greater, custom, each

HCPCS Level II A-code · short descriptor: “G com stcking thgh 40+ cust”

Code system
HCPCS Level II
Family
A — Medical & surgical supplies, ambulance
Medicare coverage status
Carrier judgment — coverage decided by the DME MAC
DMEPOS payment category
LC
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.

A6558 Medicare fee schedule (April 2026)

Base (no modifier) LC

Medicare allowable: $320.17 in all listed states.

StateNon-ruralRural
AK$320.17
AL$320.17
AR$320.17
AZ$320.17
CA$320.17
CO$320.17
CT$320.17
DC$320.17
DE$320.17
FL$320.17
GA$320.17
HI$320.17
IA$320.17
ID$320.17
IL$320.17
IN$320.17
KS$320.17
KY$320.17
LA$320.17
MA$320.17
MD$320.17
ME$320.17
MI$320.17
MN$320.17
MO$320.17
MS$320.17
MT$320.17
NC$320.17
ND$320.17
NE$320.17
NH$320.17
NJ$320.17
NM$320.17
NV$320.17
NY$320.17
OH$320.17
OK$320.17
OR$320.17
PA$320.17
PR$320.17
RI$320.17
SC$320.17
SD$320.17
TN$320.17
TX$320.17
UT$320.17
VA$320.17
VI$320.17
VT$320.17
WA$320.17
WI$320.17
WV$320.17
WY$320.17
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 A-codes

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