Q4123 — Alloskin rt, per square centimeter (add-on, list separately in addition to primary procedure)
Q4123 is a HCPCS Level II code for alloskin rt, per square centimeter (add-on, list separately in addition to primary procedure). It belongs to the Temporary Codes section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Carrier judgment
Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q3-Jul. This states Medicare’s position on the code, not on your particular claim.
Physician fee schedule statusA
Active code. Paid separately under the physician fee schedule.
- Work RVU
- 0.00
- PE (non-facility)
- 3.81
- PE (facility)
- 3.81
- Malpractice RVU
- 0.00
Global period: ZZZ
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The CMS record for Q4123
- Long descriptor
- Alloskin rt, per square centimeter (add-on, list separately in addition to primary procedure)
- Short descriptor
- Alloskin
- Added
- January 1, 2012
- BETOS
- O1E
- Pricing indicator
- 11 — Physician fee schedule
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service — CMS's own analytic grouping.
Price established using national RVUs.
Codes adjacent to Q4123
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If Q4123 is not quite right, the correct code is very often within a few positions of it.
- Q4115Alloskin, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4116Alloderm, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4117Hyalomatrix, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4118Matristem micromatrix, 1 mg
- Q4119Matristem wound matrix, per square centimeterterminated
- Q4120Matristem burn matrix, per square centimeterterminated
- Q4121Theraskin, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4122Dermacell, dermacell awm or dermacell awm porous, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4124Oasis ultra tri-layer wound matrix, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4125Arthroflex, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4126Memoderm, dermaspan, tranzgraft or integuply, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4127Talymed, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4128Flex hd, or allopatch hd, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4129Unite biomatrix, per square centimeterterminated
- Q4130Strattice tm, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4131Epifix or epicord, per square centimeterterminated
Questions about Q4123
What is HCPCS code Q4123?
Q4123 is a HCPCS Level II code for alloskin rt, per square centimeter (add-on, list separately in addition to primary procedure). It sits in the Temporary Codes section.
Does Medicare cover Q4123?
The CMS HCPCS file marks Q4123 as "Carrier judgment". Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
How is Q4123 paid under the physician fee schedule?
Q4123 carries PFS status code A. Active code. Paid separately under the physician fee schedule.