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A4256 — Normal, low and high calibrator solution / chips

HCPCS Level II A-code · short descriptor: “Calibrator solution/chips”

Code system
HCPCS Level II
Family
A — Medical & surgical supplies, ambulance
Medicare coverage status
Special coverage instructions apply
DMEPOS payment category
Supplies
Prior authorization
Not on Medicare required-PA 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.

A4256 Medicare fee schedule (April 2026)

Base (no modifier) Supplies

Medicare allowable: $3.38 in all listed states.

StateNon-ruralRural
AK$3.38—
AL$3.38—
AR$3.38—
AZ$3.38—
CA$3.38—
CO$3.38—
CT$3.38—
DC$3.38—
DE$3.38—
FL$3.38—
GA$3.38—
HI$3.38—
IA$3.38—
ID$3.38—
IL$3.38—
IN$3.38—
KS$3.38—
KY$3.38—
LA$3.38—
MA$3.38—
MD$3.38—
ME$3.38—
MI$3.38—
MN$3.38—
MO$3.38—
MS$3.38—
MT$3.38—
NC$3.38—
ND$3.38—
NE$3.38—
NH$3.38—
NJ$3.38—
NM$3.38—
NV$3.38—
NY$3.38—
OH$3.38—
OK$3.38—
OR$3.38—
PA$3.38—
PR$3.38—
RI$3.38—
SC$3.38—
SD$3.38—
TN$3.38—
TX$3.38—
UT$3.38—
VA$3.38—
VI$3.38—
VT$3.38—
WA$3.38—
WI$3.38—
WV$3.38—
WY$3.38—
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

CO-50 medical necessity

Related A-codes

A4206A4207A4208A4209A4210A4211A4212A4213A4215A4216A4217A4218

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