HCPCS code J3304: Triamcinolone injection, extended-release, per 1 mg2026 Medicare rate & RVUs in Texas
J3304 identifies preservative-free, extended-release triamcinolone acetonide in microspheres, generally administered into the knee joint for osteoarthritis.
CMS doesn’t publish an office rate for J3304 in Texas.
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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On this page 9 sections
What J3304 covers
J3304 represents preservative-free triamcinolone acetonide in an extended-release microsphere formulation, marketed as Zilretta. It is administered by intra-articular injection, typically by a physician or other qualified practitioner treating knee osteoarthritis. The code identifies the drug, not the joint-injection procedure; the administration is reported separately when appropriate.
CMS assigns J3304 physician fee schedule status E, meaning it is excluded from the physician fee schedule. When Medicare covers the drug, payment is handled under another payment method; as a Part B drug, it is generally priced using CMS quarterly Average Sales Price files. Special Medicare coverage instructions apply. Each unit represents 1 mg of triamcinolone acetonide, so report the number of units that matches the dose administered.
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.
Where J3304 pays more and less in Texas
The same RVUs, adjusted for each area’s costs. Open a locality for its calculation, history and nearby areas.
8 of 8 payment localities
| Payment locality | Office | Facility |
|---|---|---|
| Austin, TX | Unavailable | Unavailable |
| Beaumont, TX | Unavailable | Unavailable |
| Brazoria, TX | Unavailable | Unavailable |
| Dallas, TX | Unavailable | Unavailable |
| Fort Worth, TX | Unavailable | Unavailable |
| Galveston, TX | Unavailable | Unavailable |
| Houston, TX | Unavailable | Unavailable |
| Rest of Texas | Unavailable | Unavailable |
How the J3304 rate is calculated
Each of J3304’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 · J3304
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 J3304
J3304 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 · J3304
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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J3304 isn’t priced in this setting.
J3304 compared with similar codes
Compare codes · National
4 codes, side by side
How to choose
- J3301Triamcinolone injectionPer 10 mg
- J3301 identifies another triamcinolone acetonide injection. J3304 is specific to the preservative-free extended-release microsphere product.
- J3300Triamcinolone injectionPreservative-free, per 1 mg
- J3300 identifies preservative-free triamcinolone acetonide in a different formulation; J3304 identifies the extended-release microsphere product.
- J3303Triamcinolone hexacetonidePer 5 mg
- J3303 is triamcinolone hexacetonide. Select J3304 only when the extended-release triamcinolone acetonide microsphere product was administered.
J3304 billing questions
When should J3304 be used instead of J3301?
Use J3304 for the preservative-free, extended-release microsphere formulation. J3301 identifies a different triamcinolone acetonide injection and is not a substitute for this formulation.
How many units should be reported?
Each J3304 unit represents 1 mg. Report units corresponding to the milligrams administered.
Does J3304 include the joint injection procedure?
No. J3304 identifies the drug; report the joint-injection procedure separately when appropriate. CPT 20610 describes injection into a major joint or bursa without ultrasound guidance.
How does Medicare treat J3304?
CMS assigns physician fee schedule status E, so the code is excluded from the physician fee schedule. When covered, it is generally paid as a Part B drug using CMS quarterly ASP drug pricing files, and special Medicare coverage instructions apply.
What should the record support?
Document the extended-release product administered, the dose in milligrams, and the injection site. The product and dose support selection of J3304 and calculation of its units.
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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