hcpcs data

Q4171

Interfyl, 1 mg

Medicare: Carrier judgmentQ seriesAdded January 01, 2017

What Q4171 means

Q4171 (Interfyl, 1 mg) belongs to the HCPCS Level II Q series (Temporary Codes). Its Medicare coverage status is Carrier judgment. Medicare coverage is left to the judgment of the local Medicare Administrative Contractor (MAC), so check your MAC's local coverage determinations.

Part B pricing: Price established by carriers (e.g., not otherwise classified, individual determination, carrier discretion).

Code details

Short description
Interfyl, 1 mg
Coverage code
C = Carrier judgment
Pricing indicator
13 = Price established by carriers (e.g., not otherwise classified, individual determination, carrier discretion)
Multiple pricing indicator
A = Not applicable as HCPCS priced under one methodology
Type of service
1 = Medical care
Action code
P = Payment change (MOG, pricing indicator codes, anesthesia base units, Ambulatory Surgical Centers)
Action effective date
January 01, 2026
Code added date
January 01, 2017
Data year
2026

Questions about Q4171

What is HCPCS code Q4171?

HCPCS code Q4171 is a Level II code in the Q series (Temporary Codes). Its full description is: "Interfyl, 1 mg"

Is Q4171 a CPT code?

No. Q4171 is a HCPCS Level II code maintained by CMS, not a CPT (Level I) code from the American Medical Association. People often search for it as a CPT code because both code sets are reported on the same claims.

Does Medicare cover HCPCS code Q4171?

The Medicare coverage code for Q4171 is "Carrier judgment". Medicare coverage is left to the judgment of the local Medicare Administrative Contractor (MAC), so check your MAC's local coverage determinations.

When was HCPCS code Q4171 added?

Q4171 was added to the HCPCS code set on January 01, 2017. The most recent action on it (Payment change (MOG, pricing indicator codes, anesthesia base units, Ambulatory Surgical Centers)) took effect on January 01, 2026.

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