J1446 — Injection, tbo-filgrastim, 5 micrograms
J1446 is a HCPCS Level II code for injection, tbo-filgrastim, 5 micrograms. It belongs to the Drugs Administered Other Than Oral Method section. It was terminated on December 31, 2015 and is not valid on new claims.
This code has been terminated
CMS terminated J1446 on December 31, 2015. It stays in the file as history — a claim you are auditing from before that date may legitimately carry it — but it must not appear on a new claim. The adjacent codes below are the usual place to look for its replacement.
Medicare coverage: Special coverage instructions apply
There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.
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.
The CMS record for J1446
- Long descriptor
- Injection, tbo-filgrastim, 5 micrograms
- Short descriptor
- Inj, tbo-filgrastim, 5 mcg
- Added
- January 1, 2014
- Terminated
- December 31, 2015
- BETOS
- O1E
- Pricing indicator
- 51 — Other
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.
When CMS retired it.
Berenson-Eggers Type of Service — CMS's own analytic grouping.
Drugs.
Codes adjacent to J1446
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If J1446 is not quite right, the correct code is very often within a few positions of it.
- J1437Injection, ferric derisomaltose, 10 mg
- J1438Injection, etanercept, 25 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered)
- J1439Injection, ferric carboxymaltose, 1 mg
- J1440Fecal microbiota, live - jslm, 1 ml
- J1442Injection, filgrastim (g-csf), excludes biosimilars, 1 microgram
- J1443Injection, ferric pyrophosphate citrate solution (triferic), 0.1 mg of ironterminated
- J1444Injection, ferric pyrophosphate citrate powder, 0.1 mg of ironterminated
- J1445Injection, ferric pyrophosphate citrate solution (triferic avnu), 0.1 mg of ironterminated
- J1447Injection, tbo-filgrastim, 1 microgram
- J1448Injection, trilaciclib, 1mg
- J1449Injection, eflapegrastim-xnst, 0.1 mg
- J1450Injection fluconazole, 200 mg
- J1451Injection, fomepizole, 15 mg
- J1452Injection, fomivirsen sodium, intraocular, 1.65 mgterminated
- J1453Injection, fosaprepitant, 1 mg
- J1454Injection, fosnetupitant 235 mg and palonosetron 0.25 mg
Questions about J1446
What is HCPCS code J1446?
J1446 is a HCPCS Level II code for injection, tbo-filgrastim, 5 micrograms. It sits in the Drugs Administered Other Than Oral Method section.
Does Medicare cover J1446?
The CMS HCPCS file marks J1446 as "Special coverage instructions apply". There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.
Is J1446 still valid?
No. J1446 was terminated on December 31, 2015 and should not be used on new claims.