HCPCS code J1442: Filgrastim injection, per 1 microgram2026 Medicare rate & RVUs in Guam
Reports non-biosimilar filgrastim furnished to support neutrophil recovery or mobilize blood-forming cells, with one unit for each microgram administered.
CMS doesn’t publish an office rate for J1442 in Guam.
Medicare allowed amount for participating (non-QP) physicians, before deductible, coinsurance and claim adjustments. Not a patient’s bill or a hospital charge.
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What J1442 covers
J1442 represents filgrastim, a granulocyte colony-stimulating factor that promotes neutrophil production. Oncology and hematology practices commonly furnish it to help prevent or reduce neutropenia associated with myelosuppressive chemotherapy, and it is also used in settings such as severe chronic neutropenia or peripheral blood stem-cell mobilization. The code is for filgrastim itself, not a biosimilar product; the drug may be given subcutaneously or intravenously according to the prescribed regimen.
CMS assigns this code physician fee schedule status E, meaning it is excluded from the physician fee schedule. When Medicare covers the drug, payment is through another method; HCPCS pricing identifies it as a Part B drug generally priced using CMS quarterly ASP drug pricing files. Special Medicare coverage instructions apply. Each billing unit represents 1 microgram, so report units based on the administered filgrastim dose. The code represents the drug quantity, not the administration service.
This summary was written with AI assistance from CMS physician fee schedule data and checked against the CMS billing rules shown here. Rates on this page come directly from CMS files.
J1442 in Hawaii, Guam, HI
| Payment locality | Office | Facility |
|---|---|---|
| Hawaii, Guam, HI | Unavailable | Unavailable |
How the J1442 rate is calculated
Each of J1442’s three RVUs is multiplied by a geographic index (GPCI) for the payment locality, added up, and multiplied by the conversion factor. Drag the indexes or enter a ZIP to see what moves the rate.
How the rate is built · J1442
RVUs × geographic indexes × conversion factor
Work0.00
0.00 RVUs× 1.000 GPCI
Practice expense0.00
0.00 RVUs× 1.000 GPCI
Malpractice0.00
0.00 RVUs× 1.000 GPCI
Adjusted RVUs
0.0000
Conversion factor
$33.4009
Medicare rate
$0.00
Every GPCI starts at 1.000, the national rate. Enter a ZIP or drag a slider.
Payment rules and modifiers for J1442
J1442 has no global surgery period, no multiple-procedure, bilateral or assistant-at-surgery adjustment, and no professional/technical split. What changes the payment is where the service happens: the place of service on the claim decides whether Medicare pays the office or the facility rate.
Place of service · J1442
Which rate does Medicare pay?
The POS code on the claim line (CMS-1500 box 24B).
POS 11 · non-facility rate · national
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J1442 isn’t priced in this setting.
J1442 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- J1447Tbo-filgrastimPer 1 mcg
- J1447 is for tbo-filgrastim, not the non-biosimilar filgrastim represented by J1442. Match the code to the drug product administered.
- Q5101Zarxio injectionPer 1 mcg
- Q5101 identifies filgrastim-sndz, a biosimilar; J1442 excludes biosimilar filgrastim products.
- Q5110NivestymPer 1 mcg
- Q5110 identifies filgrastim-aafi, a biosimilar product. J1442 applies to non-biosimilar filgrastim.
J1442 billing questions
Does J1442 include filgrastim biosimilars?
No. J1442 is for filgrastim excluding biosimilars; use the code for the specific biosimilar product when one was furnished, such as Q5101 or Q5110.
How many units should be reported?
One unit represents 1 microgram of filgrastim. Report units based on the dose administered.
Does J1442 include the injection or infusion service?
J1442 represents the drug quantity, not the administration service.
How does Medicare treat J1442?
CMS assigns status E, so J1442 is excluded from the physician fee schedule. When Medicare covers the drug, it is paid through another method; HCPCS pricing identifies it as a Part B drug generally priced using quarterly ASP drug pricing files.
When would J1447 be used instead?
J1447 identifies tbo-filgrastim, a different neutrophil-stimulating drug. Use the code that matches the product furnished rather than selecting by clinical purpose alone.
Where these rates come from
FeeBase calculates base physician payments from CMS work, practice-expense and malpractice RVUs, adjusted by each locality’s geographic indexes and the conversion factor. Services without a published rate are labeled, never given a made-up amount. Amounts are Medicare allowed amounts before claim adjustments: not a patient’s bill or a commercial rate.
CMS RVU26D · effective Oct 1, 2026 through the day before Jan 1, 2027
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