Q4171 — Interfyl, 1 mg
Q4171 is a HCPCS Level II code for interfyl, 1 mg. 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 statusC
Contractor-priced. Your MAC establishes the RVUs and the payment amount case by case, usually after reviewing documentation. There is no national amount to compute.
Global period: XXX
Want the dollar amount for your locality? The fee calculator applies your GPCI and the current conversion factor.
The CMS record for Q4171
- Long descriptor
- Interfyl, 1 mg
- Short descriptor
- Interfyl, 1 mg
- Added
- January 1, 2017
- BETOS
- O1E
- Pricing indicator
- 13 — 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 by carriers — not otherwise classified, individual determination, or carrier discretion.
Codes adjacent to Q4171
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If Q4171 is not quite right, the correct code is very often within a few positions of it.
- Q4163Woundex, bioskin, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4164Helicoll, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4165Keramatrix or kerasorb, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4166Cytal, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4167Truskin, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4168Amnioband, 1 mg
- Q4169Artacent wound, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4170Cygnus, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4172Puraply or puraply am, per square centimeterterminated
- Q4173Palingen or palingen xplus, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4174Palingen or promatrx, 0.36 mg per 0.25 cc
- Q4175Miroderm, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4176Neopatch or therion, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4177Floweramnioflo, 0.1 cc
- Q4178Floweramniopatch, per square centimeter (add-on, list separately in addition to primary procedure)
- Q4179Flowerderm, per square centimeter (add-on, list separately in addition to primary procedure)
Questions about Q4171
What is HCPCS code Q4171?
Q4171 is a HCPCS Level II code for interfyl, 1 mg. It sits in the Temporary Codes section.
Does Medicare cover Q4171?
The CMS HCPCS file marks Q4171 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 Q4171 paid under the physician fee schedule?
Q4171 carries PFS status code C. Contractor-priced. Your MAC establishes the RVUs and the payment amount case by case, usually after reviewing documentation. There is no national amount to compute.