J3121 — Injection, testosterone enanthate, 1 mg
J3121 is a HCPCS Level II code for injection, testosterone enanthate, 1 mg. It belongs to the Drugs Administered Other Than Oral Method section. Whether Medicare pays it depends on the coverage rule below.
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.
Physician fee schedule statusE
Excluded from the physician fee schedule by regulation. Payment, where it exists, comes from another fee schedule (drugs via ASP, supplies via DMEPOS, and so on).
Global period: XXX
Want the dollar amount for your locality? The fee calculator applies your GPCI and the current conversion factor.
Medically Unlikely Edits — units per day
The most units of J3121 Medicare will pay on one date of service. Bill more on a single line and it is denied. The limit is not the same in every setting, so the row that matters is the one matching the claim you are building.
- practitioner
- 400 units MAI 3 — Date of Service Edit: Clinical · Prescribing Information
- outpatient
- 400 units MAI 3 — Date of Service Edit: Clinical · Prescribing Information
- DME supplier
- 0 — never payable MAI 3 — Date of Service Edit: Clinical · CMS Policy
The adjudication indicator decides whether exceeding the limit is worth appealing at all: MAI 1 is a line edit you can support with documentation, MAI 3 is a date-of-service edit that is also appealable, and MAI 2 is absolute — no documentation overrides it. CMS MUE 2026Q3.
The CMS record for J3121
- Long descriptor
- Injection, testosterone enanthate, 1 mg
- Short descriptor
- Inj testostero enanthate 1mg
- Added
- January 1, 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.
Berenson-Eggers Type of Service — CMS's own analytic grouping.
Drugs.
Codes adjacent to J3121
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If J3121 is not quite right, the correct code is very often within a few positions of it.
- J3070Injection, pentazocine, 30 mg
- J3090Injection, tedizolid phosphate, 1 mg
- J3095Injection, telavancin, 10 mg
- J3101Injection, tenecteplase, 1 mg
- J3105Injection, terbutaline sulfate, up to 1 mg
- J3110Injection, teriparatide, 10 mcg
- J3111Injection, romosozumab-aqqg, 1 mg
- J3120Injection, testosterone enanthate, up to 100 mgterminated
- J3130Injection, testosterone enanthate, up to 200 mgterminated
- J3140Injection, testosterone suspension, up to 50 mgterminated
- J3145Injection, testosterone undecanoate, 1 mg
- J3150Injection, testosterone propionate, up to 100 mgterminated
- J3230Injection, chlorpromazine hcl, up to 50 mg
- J3240Injection, thyrotropin alpha, 0.9 mg, provided in 1.1 mg vial
- J3241Injection, teprotumumab-trbw, 10 mg
- J3243Injection, tigecycline, 1 mg
Questions about J3121
What is HCPCS code J3121?
J3121 is a HCPCS Level II code for injection, testosterone enanthate, 1 mg. It sits in the Drugs Administered Other Than Oral Method section.
Does Medicare cover J3121?
The CMS HCPCS file marks J3121 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.
How is J3121 paid under the physician fee schedule?
J3121 carries PFS status code E. Excluded from the physician fee schedule by regulation. Payment, where it exists, comes from another fee schedule (drugs via ASP, supplies via DMEPOS, and so on).